devel October 2018

devel@uclibc-ng.org

11 participants
10 discussions

uclibc-ng-test and math complex functions
by Laurent Thévenoux 20 Dec '18

20 Dec '18

Hi, I'm trying to build uclibc-ng-test, but I can't link with complex trigo functions (such as cacos, casin, catan, etc.). They are required for the following test targets: test-double, test-double-finite, test-float, test-float-finite, test-idouble, and test-ifloat. They are declared in uclibc-ng/sysdeps/linux/common/bits/cmathcalls.h, but I can't find their definitions. Does uclibc-ng define them? Thanks, -- Laurent Thévenoux lthevenoux(a)kalray.eu Kalray S.A. 180 Avenue de l'Europe 38330 Montbonnot FRANCE

5 7

SIGSEGV on pthread cancelation
by Александр Усов 30 Oct '18

30 Oct '18

Hello. I faced a problem I can't solve by myself so I will be grateful for any help. This code causes segfault: #include <poll.h> #include <pthread.h> static void * thread_func (void *arg) { int count = 0; struct pollfd pfds[1] = { 0 }; poll(pfds, count, 1000); } int main () { pthread_t thread; if (pthread_create(&thread, NULL, thread_func, NULL)) return 1; if (pthread_cancel(thread)) return 2; if (pthread_join(thread, NULL)) return 3; return 0; } This is how backtrace looks: Thread 2 received signal SIG32. Thread 2: #0 0xb76b24f6 in __poll_nocancel (fds=0xb76a0414, nfds=0, timeout=1000) at libc/sysdeps/linux/common/poll.c:27 #1 0xb76b2585 in __GI_poll (fds=0xb76a0414, nfds=0, timeout=1000) at libc/sysdeps/linux/common/poll.c:208 #2 0x080484c3 in thread_func () #3 0xb77954b0 in start_thread (arg=0xb76ebba0) at libpthread/nptl/pthread_create.c:285 #4 0xb76fcae7 in clone () at libc/sysdeps/linux/i386/clone.S:103 Thread 1: #0 0xb77996f1 in pthread_join (threadid=3077487520, thread_return=0x0) at libpthread/nptl/pthread_join.c:88 #1 0x08048522 in main () Architecture is i386. Interesting thing is that segmentation fault only happens when uClibc-ng built with debug enabled (DODEBUG=y). Thank you.

2 2

[ARM][FDPIC]: Add support for Thumb-only processors.
by Christophe Lyon 29 Oct '18

29 Oct '18

Hi, This patch enables to compile uClibc-ng in FDPIC mode with a compiler defaulting to Thumb mode (eg. targeting a cortex-M processor). OK? Thanks, Christophe

2 4

[PATCH] mkostemp64: clear flags, as mkostemp does
by Carlos Santos 29 Oct '18

29 Oct '18

This should have been made in commit 9649721950 but was forgotten. Signed-off-by: Carlos Santos <casantos(a)datacom.com.br> --- Test: $ cat test.c #include <errno.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> void fatal(int n) { fprintf(stderr, "fatal[%d]: %s\n", n, strerror(errno)); exit(1); } int main(int argc, char *argv[]) { FILE *f; int cur_mode; char template[64]; strncpy(template, argc > 1 ? argv[1] : "testXXXXXX", 63); umask(077); printf("main[1]: %s, %07o\n", template, O_WRONLY|O_CLOEXEC); int fd = mkostemp(template, O_WRONLY|O_CLOEXEC); if (fd < 0) { fatal(1); } cur_mode = fcntl(fd, F_GETFL); printf("main[2]: %s, %07o\n", template, cur_mode); printf("main[3]: %d, %s\n", fd, "we"); f = fdopen(fd, "we"); if (!f) { fatal(2); } if (fclose(f) == EOF) { fatal(3); } return 0; } $ x86_64-buildroot-linux-uclibc-cc -Wall -Werror -D_GNU_SOURCE \ -o mkostemp-test test.c $ x86_64-buildroot-linux-uclibc-cc -Wall -Werror -D_GNU_SOURCE \ -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 \ -o mkostemp-test-large test.c [ copy executables to target device (qemu, in this case) ] Without patch: # mkostemp-test main[1]: testXXXXXX, 2000001 random: fast init done main[2]: testIPn9UR, 0100002 main[3]: 3, we # mkostemp-test-large main[1]: testXXXXXX, 2000001 main[2]: testiXRydb, 0100003 main[3]: 3, we fatal[2]: Invalid argument With patch: # mkostemp-test main[1]: testXXXXXX, 2000001 main[2]: testcVhbXs, 0100002 main[3]: 3, we # mkostemp-test-large main[1]: testXXXXXX, 2000001 main[2]: testDAulBF, 0100002 main[3]: 3, we --- Change-Id: I07226e166de1d8d7b8398cd54939ad43768352cf --- libc/stdlib/mkostemp64.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libc/stdlib/mkostemp64.c b/libc/stdlib/mkostemp64.c index aa9736cd6..f4674bb0c 100644 --- a/libc/stdlib/mkostemp64.c +++ b/libc/stdlib/mkostemp64.c @@ -15,9 +15,9 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#include <fcntl.h> #include <stdio.h> #include <stdlib.h> +#include <fcntl.h> #include "../misc/internals/tempname.h" /* Generate a unique temporary file name from TEMPLATE. @@ -27,6 +27,7 @@ int mkostemp64 (char *template, int flags) { + flags -= flags & O_ACCMODE; /* Remove O_RDONLY, O_WRONLY, and O_RDWR. */ return __gen_tempname (template, __GT_BIGFILE, flags | O_LARGEFILE, 0, S_IRUSR | S_IWUSR); } -- 2.17.1

1 0

[PATCH 1/1] time.h: Add CLOCK_TAI
by Petr Vorel 28 Oct '18

28 Oct '18

Added in kernel in kernel 3.10 in 1ff3c9677bff ("timekeeping: Add CLOCK_TAI clockid") NOTE: CLOCK_SGI_CYCLE was not added, as it has been lately removed. Signed-off-by: Petr Vorel <petr.vorel(a)gmail.com> --- Hi, added in glibc 2.21 and in musl 0.9.12. Kind regards, Petr --- libc/sysdeps/linux/common/bits/time.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libc/sysdeps/linux/common/bits/time.h b/libc/sysdeps/linux/common/bits/time.h index c4269ae47..e35fa867f 100644 --- a/libc/sysdeps/linux/common/bits/time.h +++ b/libc/sysdeps/linux/common/bits/time.h @@ -65,6 +65,8 @@ # define CLOCK_REALTIME_ALARM 8 /* Like CLOCK_BOOTTIME but also wakes suspended system. */ # define CLOCK_BOOTTIME_ALARM 9 +/* Like CLOCK_REALTIME but in International Atomic Time. */ +# define CLOCK_TAI 11 /* Flag to indicate time is absolute. */ # define TIMER_ABSTIME 1 -- 2.19.1

2 1

Re: [uclibc-ng-devel] [PATCH] ARC: Accommodate TLS fix in Binutils
by Vineet Gupta 24 Oct '18

24 Oct '18

On 10/24/2018 07:11 AM, Evgeniy Didin wrote: > [1] fixes clash of TLS variables on ARC and since LD now calculates relocations > a bit different now we need to update dynamic loader as well otherwise relocs > will be calculated improperly. > > Note this is an ABI change and should go in-line with corresponding ARC tools. > That said either arc-2018.09 (to be released in few weeks) or the next version of upstream > Binutils (2.32) are required for normal TLS work on ARC. > > Testcase: > ----------------------------------8<------------------------------- > #include <stdio.h> > int foo3(void); > int foo1(void); > > #ifdef _SHARED > int foo1(){ > static __thread int val3=1; > val3 += 2; > return val3; > } > > #elif _SHARED2 > int foo3(){ > static __thread int val2=0; > val2 += 2; > return val2; > } > #else > int main(){ > printf("foo1 = %d \n", foo1()); > printf("foo3 = %d \n", foo3()); > return 0; > } > #endif > --------------------------------->8--------------------------------------- > > The result shoud be: > ----8<---- > foo1 = 3 > foo3 = 2 > ---->8---- > > Commands to build artefacts: > ----------------------------------------8<------------------------------- > arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \ > -fPIC -o testtls.o -D_SHARED -c tst.c > arc-linux-gcc -fPIE -ffunction-sections -fdata-sections -pthread -Os \ > -fPIC -o testtls2.o -D_SHARED2 -c tst.c > arc-linux-gcc -shared -o libtesttls.so testtls.o testtls2.o -lm -Os > arc-linux-gcc tst.c -o tst.out -L./ -ltesttls -Os -fPIE > --------------------------------->8--------------------------------------- > > Add path to libtesttls.so file to LD_LIBRARY_PATH before runnig > tst.out application. > > [1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=714e9a9… > > Signed-off-by: Alexey Brodkin <abrodkin(a)synopsys.com> > Signed-off-by: Evgeniy Didin <didin(a)synopsys.com> > CC: Cupertino Miranda <cmiranda(a)synopsys.com> > CC: Vineet Gupta <vgupta(a)synopsys.com> Acked-by: Vineet Gupta <vgupta(a)synopsys.com> > CC: Waldemar Brodkorb <wbx(a)uclibc-ng.org> > --- > ldso/ldso/arc/elfinterp.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/ldso/ldso/arc/elfinterp.c b/ldso/ldso/arc/elfinterp.c > index a30c19bcb..61029185f 100644 > --- a/ldso/ldso/arc/elfinterp.c > +++ b/ldso/ldso/arc/elfinterp.c > @@ -165,7 +165,7 @@ _dl_do_reloc(struct elf_resolve *tpnt, struct r_scope_elem *scope, > *reloc_addr = tls_tpnt->l_tls_modid; > break; > case R_ARC_TLS_DTPOFF: > - *reloc_addr = symbol_addr; > + *reloc_addr += symbol_addr; > break; > case R_ARC_TLS_TPOFF: > CHECK_STATIC_TLS ((struct link_map *) tls_tpnt);

1 0

buildroot uclibc-ng static libm support
by servo gmrt 20 Oct '18

20 Oct '18

Hi, Hi, I am using buildroot for my development work. I build a minimal linux for ICOP VDX6354 board. I am using rtai-4.1 for hard realtime task for my application. I need to link the static libm to rtai_math.ko module to use math function support in rtai. When I use buildroot with uclibc I am able to generate libm.a. But when I try to disassabmle the libm.a it lists lot of unknown symbols. Also when I try to insert the rtai_math.ko it also reports the unknown symbols. Is there any way to build the uclibc static libm.a with all symbols included in it. Buildroot Version : 2018.02.5 with rtai-4.1 Pl. comment. *Kernel Error MessagesOct 9 07:50:59 buildroot kern.info <http://kern.info> kernel: [ 150.912353] I-pipe: head domain RTAI registered.Oct 9 07:50:59 buildroot kern.info <http://kern.info> kernel: [ 150.912644] RTAI[hal]: mounted. ISOL_CPUS_MASK: 0.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.912988] SYSINFO - # CPUs: 1, TIMER NAME: 'lapic', TIMER IRQ: 2306, TIMER FREQ: 62425609, CLOCK NAME: 'tsc', CLOCK FREQ: 2992451000, CPU FREQ: 2992451000, LINUX TIMER IRQ: 2306.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] REMARK: RTAI WILL NOT ACCESS USER SPACE ON STACKS ARGS ITS WAY.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.037668] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.043926] , kstacks pool size = 524288 bytesOct 9 07:51:03 buildroot kern.warn kernel: [ 154.044298] .Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.044673] RTAI[sched]: hard timer type/freq = lapic/62425609(Hz); timing: ONESHOT; Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.045091] linear timed lists.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.045471] RTAI[sched]: Linux timer freq = 1000 (Hz), TimeBase freq = 2992451000 hz.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.045846] RTAI[sched]: timer setup = 2569 ns, resched latency = 0 ns.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.047169] RTAI[usi]: enabled.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.067972] USERMODE CHECK: OK.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.068754] USERMODE CHECK PROVIDED (ns): KernelLatency -1, UserLatency -1.Oct 9 07:51:04 buildroot kern.warn kernel: [ 155.044665] KERNEL SPACE LATENCY ENDED AT CYCLE: 9706, LATENCY = 499704, VARIANCE = 2743/10004569, GAIN = 68563/1000000000, LEAST = 9828.Oct 9 07:51:04 buildroot kern.warn kernel: [ 155.144175] AFTER KERNEL CALIBRATION (WITH RTAI TASK, ns): KernelLatency 166989, UserLatency -1 (CALIBRATION: PERIOD 10000 (ns), TIME 1074635480 (ns)).Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.153787] USER SPACE LATENCY ENDED AT CYCLE: 10000, LATENCY = 208549, VARIANCE = 0.000632709, GAIN = 0.000158177, LEAST = 28692.Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.156272] USERMODE USER SPACE CALIBRATION: OK.Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.156942] AFTER USER CALIBRATION (ns): KernelLatency 166989, UserLatency 69691 (CALIBRATION: PERIOD 10000 (ns), TIME 1011276710 (ns)).Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.158248] FINAL CALIBRATION SUMMARY (ns): KernelLatency 166989, UserLatency 69691.Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.457001] rtai_math: Unknown symbol expm1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.457699] rtai_math: Unknown symbol fmodf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.458650] rtai_math: Unknown symbol fabs (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461533] rtai_math: Unknown symbol log (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461533] rtai_math: Unknown symbol sqrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461787] rtai_math: Unknown symbol cosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.462702] rtai_math: Unknown symbol asinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.463434] rtai_math: Unknown symbol lroundf (err 0)* *Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.464418] rtai_math: Unknown symbol exp2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.465166] rtai_math: Unknown symbol ldexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.465803] rtai_math: Unknown symbol tgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.466709] rtai_math: Unknown symbol logb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.467461] rtai_math: Unknown symbol round (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.468338] rtai_math: Unknown symbol atanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.468979] rtai_math: Unknown symbol remquof (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.470590] rtai_math: Unknown symbol nextafterf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.471333] rtai_math: Unknown symbol powf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.472320] rtai_math: Unknown symbol lround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.472948] rtai_math: Unknown symbol modff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.473841] rtai_math: Unknown symbol tanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.474584] rtai_math: Unknown symbol ceil (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.475467] rtai_math: Unknown symbol logf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.476193] rtai_math: Unknown symbol floor (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.476843] rtai_math: Unknown symbol j1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.477733] rtai_math: Unknown symbol sqrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.478471] rtai_math: Unknown symbol y0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.479455] rtai_math: Unknown symbol fdimf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.480185] rtai_math: Unknown symbol lgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.480830] rtai_math: Unknown symbol roundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.481824] rtai_math: Unknown symbol truncf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.482571] rtai_math: Unknown symbol ldexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.483448] rtai_math: Unknown symbol yn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.484224] rtai_math: Unknown symbol __fpclassifyf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.484867] rtai_math: Unknown symbol erf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.485781] rtai_math: Unknown symbol scalbln (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.486522] rtai_math: Unknown symbol fabsf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.487402] rtai_math: Unknown symbol gamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.488203] rtai_math: Unknown symbol acoshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.488831] rtai_math: Unknown symbol llrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.489733] rtai_math: Unknown symbol nearbyint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.491002] rtai_math: Unknown symbol remainderf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.491998] rtai_math: Unknown symbol cosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.492795] rtai_math: Unknown symbol __signbit (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.493713] rtai_math: Unknown symbol rint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.494432] rtai_math: Unknown symbol lgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.495317] rtai_math: Unknown symbol lrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.495943] rtai_math: Unknown symbol lrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.496833] rtai_math: Unknown symbol hypotf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.497586] rtai_math: Unknown symbol __fpclassify (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.498528] rtai_math: Unknown symbol j1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.499267] rtai_math: Unknown symbol asinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.499887] rtai_math: Unknown symbol log10f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.500794] rtai_math: Unknown symbol modf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.501613] rtai_math: Unknown symbol y1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.502522] rtai_math: Unknown symbol fmod (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.503340] rtai_math: Unknown symbol cos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.503949] rtai_math: Unknown symbol tanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.504837] rtai_math: Unknown symbol exp2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.505562] rtai_math: Unknown symbol tgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.506460] rtai_math: Unknown symbol coshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.507244] rtai_math: Unknown symbol sin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.507845] rtai_math: Unknown symbol fma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.508794] rtai_math: Unknown symbol atan2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.509538] rtai_math: Unknown symbol gammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.511287] rtai_math: Unknown symbol pow (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.511904] rtai_math: Unknown symbol sinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.512786] rtai_math: Unknown symbol cbrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.513597] rtai_math: Unknown symbol atanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.514476] rtai_math: Unknown symbol log10 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.515214] rtai_math: Unknown symbol fdim (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.515826] rtai_math: Unknown symbol cbrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.516719] rtai_math: Unknown symbol log2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.517470] rtai_math: Unknown symbol lgamma_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.518477] rtai_math: Unknown symbol erff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.519235] rtai_math: Unknown symbol scalbnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.519868] rtai_math: Unknown symbol llroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.529870] rtai_math: Unknown symbol fmaxf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.531363] rtai_math: Unknown symbol ilogbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.532282] rtai_math: Unknown symbol jnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.532915] rtai_math: Unknown symbol matherr (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.533966] rtai_math: Unknown symbol jn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.534734] rtai_math: Unknown symbol nextafter (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.535689] rtai_math: Unknown symbol exp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.536430] rtai_math: Unknown symbol lgammaf_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.537349] rtai_math: Unknown symbol tan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.538178] rtai_math: Unknown symbol copysign (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.538814] rtai_math: Unknown symbol acosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.539733] rtai_math: Unknown symbol copysignf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.540501] rtai_math: Unknown symbol atan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.541495] rtai_math: Unknown symbol remainder (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.542282] rtai_math: Unknown symbol asin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.542919] rtai_math: Unknown symbol scalbn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.543844] rtai_math: Unknown symbol atan2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.544598] rtai_math: Unknown symbol log1pf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.545509] rtai_math: Unknown symbol y0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.546300] rtai_math: Unknown symbol j0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.546940] rtai_math: Unknown symbol acosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.547881] rtai_math: Unknown symbol sinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.548598] rtai_math: Unknown symbol scalblnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.549558] rtai_math: Unknown symbol ceilf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.551154] rtai_math: Unknown symbol tanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.551812] rtai_math: Unknown symbol fmaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.552720] rtai_math: Unknown symbol fmax (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.553485] rtai_math: Unknown symbol ilogb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.554401] rtai_math: Unknown symbol llround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.555218] rtai_math: Unknown symbol log2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.555879] rtai_math: Unknown symbol frexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.557555] rtai_math: Unknown symbol atanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.558279] rtai_math: Unknown symbol log1p (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.558933] rtai_math: Unknown symbol __signbitf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.559885] rtai_math: Unknown symbol expf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.560715] rtai_math: Unknown symbol rintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.561724] rtai_math: Unknown symbol llrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.562482] rtai_math: Unknown symbol j0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.563377] rtai_math: Unknown symbol sinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.564159] rtai_math: Unknown symbol floorf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.564830] rtai_math: Unknown symbol nearbyintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.565751] rtai_math: Unknown symbol asinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.566533] rtai_math: Unknown symbol acos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.567518] rtai_math: Unknown symbol hypot (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.568258] rtai_math: Unknown symbol trunc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.568908] rtai_math: Unknown symbol expm1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.569833] rtai_math: Unknown symbol y1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.571212] rtai_math: Unknown symbol logbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.571951] rtai_math: Unknown symbol frexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.572892] rtai_math: Unknown symbol erfc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.573705] rtai_math: Unknown symbol ynf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.574637] rtai_math: Unknown symbol erfcf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.575411] rtai_math: Unknown symbol remquo (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.580006] rtai_math: Unknown symbol expm1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.580803] rtai_math: Unknown symbol fmodf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.581829] rtai_math: Unknown symbol fabs (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.582602] rtai_math: Unknown symbol log (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.583539] rtai_math: Unknown symbol sqrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.584288] rtai_math: Unknown symbol cosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.584962] rtai_math: Unknown symbol asinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.585908] rtai_math: Unknown symbol lroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.586671] rtai_math: Unknown symbol exp2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.587667] rtai_math: Unknown symbol ldexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.588432] rtai_math: Unknown symbol tgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.589367] rtai_math: Unknown symbol logb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.590125] rtai_math: Unknown symbol round (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.590795] rtai_math: Unknown symbol atanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.592397] rtai_math: Unknown symbol remquof (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.593182] rtai_math: Unknown symbol nextafterf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.593848] rtai_math: Unknown symbol powf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.594855] rtai_math: Unknown symbol lround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.595657] rtai_math: Unknown symbol modff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.596586] rtai_math: Unknown symbol tanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.597342] rtai_math: Unknown symbol ceil (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.597992] rtai_math: Unknown symbol logf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.598942] rtai_math: Unknown symbol floor (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.599727] rtai_math: Unknown symbol j1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.600707] rtai_math: Unknown symbol sqrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.601543] rtai_math: Unknown symbol y0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.602440] rtai_math: Unknown symbol fdimf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.603201] rtai_math: Unknown symbol lgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.603848] rtai_math: Unknown symbol roundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.604775] rtai_math: Unknown symbol truncf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.605582] rtai_math: Unknown symbol ldexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.606566] rtai_math: Unknown symbol yn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.607331] rtai_math: Unknown symbol __fpclassifyf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.607998] rtai_math: Unknown symbol erf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.608918] rtai_math: Unknown symbol scalbln (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.609677] rtai_math: Unknown symbol fabsf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.611331] rtai_math: Unknown symbol gamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.611980] rtai_math: Unknown symbol acoshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.612995] rtai_math: Unknown symbol llrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.613773] rtai_math: Unknown symbol nearbyint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.614716] rtai_math: Unknown symbol remainderf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.615477] rtai_math: Unknown symbol cosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.616380] rtai_math: Unknown symbol __signbit (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.617180] rtai_math: Unknown symbol rint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.617812] rtai_math: Unknown symbol lgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.618750] rtai_math: Unknown symbol lrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.619525] rtai_math: Unknown symbol lrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.620515] rtai_math: Unknown symbol hypotf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.621361] rtai_math: Unknown symbol __fpclassify (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.622299] rtai_math: Unknown symbol j1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.622948] rtai_math: Unknown symbol asinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.623907] rtai_math: Unknown symbol log10f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.624699] rtai_math: Unknown symbol modf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.625607] rtai_math: Unknown symbol y1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.626364] rtai_math: Unknown symbol fmod (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.627280] rtai_math: Unknown symbol cos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.627942] rtai_math: Unknown symbol tanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.628880] rtai_math: Unknown symbol exp2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.629661] rtai_math: Unknown symbol tgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.631333] rtai_math: Unknown symbol coshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.632001] rtai_math: Unknown symbol sin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.632947] rtai_math: Unknown symbol fma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.633710] rtai_math: Unknown symbol atan2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.634674] rtai_math: Unknown symbol gammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.636002] rtai_math: Unknown symbol pow (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.638171] rtai_math: Unknown symbol sinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.638836] rtai_math: Unknown symbol cbrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.639765] rtai_math: Unknown symbol atanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.640527] rtai_math: Unknown symbol log10 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.641527] rtai_math: Unknown symbol fdim (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.642257] rtai_math: Unknown symbol cbrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.642908] rtai_math: Unknown symbol log2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.643841] rtai_math: Unknown symbol lgamma_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.644588] rtai_math: Unknown symbol erff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.645533] rtai_math: Unknown symbol scalbnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.646329] rtai_math: Unknown symbol llroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.646985] rtai_math: Unknown symbol fmaxf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.647933] rtai_math: Unknown symbol ilogbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.648690] rtai_math: Unknown symbol jnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.649577] rtai_math: Unknown symbol matherr (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.650391] rtai_math: Unknown symbol jn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.652002] rtai_math: Unknown symbol nextafter (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.652769] rtai_math: Unknown symbol exp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.653699] rtai_math: Unknown symbol lgammaf_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.654457] rtai_math: Unknown symbol tan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.655374] rtai_math: Unknown symbol copysign (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.656131] rtai_math: Unknown symbol acosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.656793] rtai_math: Unknown symbol copysignf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.657729] rtai_math: Unknown symbol atan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.658483] rtai_math: Unknown symbol remainder (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.659449] rtai_math: Unknown symbol asin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.660214] rtai_math: Unknown symbol scalbn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.660861] rtai_math: Unknown symbol atan2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.661852] rtai_math: Unknown symbol log1pf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.662614] rtai_math: Unknown symbol y0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.663514] rtai_math: Unknown symbol j0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.664320] rtai_math: Unknown symbol acosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.664954] rtai_math: Unknown symbol sinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.665884] rtai_math: Unknown symbol scalblnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.666639] rtai_math: Unknown symbol ceilf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.667554] rtai_math: Unknown symbol tanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.668348] rtai_math: Unknown symbol fmaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.669001] rtai_math: Unknown symbol fmax (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.669941] rtai_math: Unknown symbol ilogb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.670714] rtai_math: Unknown symbol llround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.672314] rtai_math: Unknown symbol log2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.672955] rtai_math: Unknown symbol frexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.673940] rtai_math: Unknown symbol atanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.674717] rtai_math: Unknown symbol log1p (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.675632] rtai_math: Unknown symbol __signbitf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.676397] rtai_math: Unknown symbol expf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.677328] rtai_math: Unknown symbol rintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.677979] rtai_math: Unknown symbol llrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.678896] rtai_math: Unknown symbol j0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.679665] rtai_math: Unknown symbol sinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.680614] rtai_math: Unknown symbol floorf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.681462] rtai_math: Unknown symbol nearbyintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.682388] rtai_math: Unknown symbol asinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.683173] rtai_math: Unknown symbol acos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.683806] rtai_math: Unknown symbol hypot (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.684704] rtai_math: Unknown symbol trunc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.685471] rtai_math: Unknown symbol expm1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.686434] rtai_math: Unknown symbol y1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.687959] rtai_math: Unknown symbol logbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.688874] rtai_math: Unknown symbol frexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.689633] rtai_math: Unknown symbol erfc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.690551] rtai_math: Unknown symbol ynf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.701296] rtai_math: Unknown symbol erfcf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.702155] rtai_math: Unknown symbol remquo (err 0)* *Regards,* *GMRT-Servo*

2 1

uclibc-ng static libm.a support
by servo gmrt 09 Oct '18

09 Oct '18

Hi, I am using buildroot for my development work. I build a minimal linux for ICOP VDX6354 board. I am using rtai-4.1 for hard realtime task for my application. I need to link the static libm to rtai_math.ko module to use math function support in rtai. When I use buildroot with uclibc I am able to generate libm.a. But when I try to disassabmle the libm.a it lists lot of unknown symbols. Also when I try to insert the rtai_math.ko it also reports the unknown symbols. Is there any way to build the uclibc static libm.a with all symbols included in it. Buildroot Version : 2018.02.5 with rtai-4.1 Pl. comment. *Kernel Error MessagesOct 9 07:50:59 buildroot kern.info <http://kern.info> kernel: [ 150.912353] I-pipe: head domain RTAI registered.Oct 9 07:50:59 buildroot kern.info <http://kern.info> kernel: [ 150.912644] RTAI[hal]: mounted. ISOL_CPUS_MASK: 0.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.912988] SYSINFO - # CPUs: 1, TIMER NAME: 'lapic', TIMER IRQ: 2306, TIMER FREQ: 62425609, CLOCK NAME: 'tsc', CLOCK FREQ: 2992451000, CPU FREQ: 2992451000, LINUX TIMER IRQ: 2306.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] REMARK: RTAI WILL NOT ACCESS USER SPACE ON STACKS ARGS ITS WAY.Oct 9 07:50:59 buildroot kern.warn kernel: [ 150.913750] Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.037668] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.043926] , kstacks pool size = 524288 bytesOct 9 07:51:03 buildroot kern.warn kernel: [ 154.044298] .Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.044673] RTAI[sched]: hard timer type/freq = lapic/62425609(Hz); timing: ONESHOT; Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.045091] linear timed lists.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.045471] RTAI[sched]: Linux timer freq = 1000 (Hz), TimeBase freq = 2992451000 hz.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.045846] RTAI[sched]: timer setup = 2569 ns, resched latency = 0 ns.Oct 9 07:51:03 buildroot kern.info <http://kern.info> kernel: [ 154.047169] RTAI[usi]: enabled.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.067972] USERMODE CHECK: OK.Oct 9 07:51:03 buildroot kern.warn kernel: [ 154.068754] USERMODE CHECK PROVIDED (ns): KernelLatency -1, UserLatency -1.Oct 9 07:51:04 buildroot kern.warn kernel: [ 155.044665] KERNEL SPACE LATENCY ENDED AT CYCLE: 9706, LATENCY = 499704, VARIANCE = 2743/10004569, GAIN = 68563/1000000000, LEAST = 9828.Oct 9 07:51:04 buildroot kern.warn kernel: [ 155.144175] AFTER KERNEL CALIBRATION (WITH RTAI TASK, ns): KernelLatency 166989, UserLatency -1 (CALIBRATION: PERIOD 10000 (ns), TIME 1074635480 (ns)).Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.153787] USER SPACE LATENCY ENDED AT CYCLE: 10000, LATENCY = 208549, VARIANCE = 0.000632709, GAIN = 0.000158177, LEAST = 28692.Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.156272] USERMODE USER SPACE CALIBRATION: OK.Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.156942] AFTER USER CALIBRATION (ns): KernelLatency 166989, UserLatency 69691 (CALIBRATION: PERIOD 10000 (ns), TIME 1011276710 (ns)).Oct 9 07:51:05 buildroot kern.warn kernel: [ 156.158248] FINAL CALIBRATION SUMMARY (ns): KernelLatency 166989, UserLatency 69691.Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.457001] rtai_math: Unknown symbol expm1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.457699] rtai_math: Unknown symbol fmodf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.458650] rtai_math: Unknown symbol fabs (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461533] rtai_math: Unknown symbol log (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461533] rtai_math: Unknown symbol sqrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.461787] rtai_math: Unknown symbol cosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.462702] rtai_math: Unknown symbol asinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.463434] rtai_math: Unknown symbol lroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.464418] rtai_math: Unknown symbol exp2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.465166] rtai_math: Unknown symbol ldexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.465803] rtai_math: Unknown symbol tgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.466709] rtai_math: Unknown symbol logb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.467461] rtai_math: Unknown symbol round (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.468338] rtai_math: Unknown symbol atanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.468979] rtai_math: Unknown symbol remquof (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.470590] rtai_math: Unknown symbol nextafterf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.471333] rtai_math: Unknown symbol powf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.472320] rtai_math: Unknown symbol lround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.472948] rtai_math: Unknown symbol modff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.473841] rtai_math: Unknown symbol tanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.474584] rtai_math: Unknown symbol ceil (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.475467] rtai_math: Unknown symbol logf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.476193] rtai_math: Unknown symbol floor (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.476843] rtai_math: Unknown symbol j1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.477733] rtai_math: Unknown symbol sqrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.478471] rtai_math: Unknown symbol y0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.479455] rtai_math: Unknown symbol fdimf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.480185] rtai_math: Unknown symbol lgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.480830] rtai_math: Unknown symbol roundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.481824] rtai_math: Unknown symbol truncf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.482571] rtai_math: Unknown symbol ldexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.483448] rtai_math: Unknown symbol yn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.484224] rtai_math: Unknown symbol __fpclassifyf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.484867] rtai_math: Unknown symbol erf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.485781] rtai_math: Unknown symbol scalbln (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.486522] rtai_math: Unknown symbol fabsf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.487402] rtai_math: Unknown symbol gamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.488203] rtai_math: Unknown symbol acoshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.488831] rtai_math: Unknown symbol llrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.489733] rtai_math: Unknown symbol nearbyint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.491002] rtai_math: Unknown symbol remainderf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.491998] rtai_math: Unknown symbol cosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.492795] rtai_math: Unknown symbol __signbit (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.493713] rtai_math: Unknown symbol rint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.494432] rtai_math: Unknown symbol lgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.495317] rtai_math: Unknown symbol lrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.495943] rtai_math: Unknown symbol lrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.496833] rtai_math: Unknown symbol hypotf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.497586] rtai_math: Unknown symbol __fpclassify (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.498528] rtai_math: Unknown symbol j1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.499267] rtai_math: Unknown symbol asinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.499887] rtai_math: Unknown symbol log10f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.500794] rtai_math: Unknown symbol modf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.501613] rtai_math: Unknown symbol y1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.502522] rtai_math: Unknown symbol fmod (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.503340] rtai_math: Unknown symbol cos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.503949] rtai_math: Unknown symbol tanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.504837] rtai_math: Unknown symbol exp2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.505562] rtai_math: Unknown symbol tgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.506460] rtai_math: Unknown symbol coshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.507244] rtai_math: Unknown symbol sin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.507845] rtai_math: Unknown symbol fma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.508794] rtai_math: Unknown symbol atan2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.509538] rtai_math: Unknown symbol gammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.511287] rtai_math: Unknown symbol pow (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.511904] rtai_math: Unknown symbol sinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.512786] rtai_math: Unknown symbol cbrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.513597] rtai_math: Unknown symbol atanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.514476] rtai_math: Unknown symbol log10 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.515214] rtai_math: Unknown symbol fdim (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.515826] rtai_math: Unknown symbol cbrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.516719] rtai_math: Unknown symbol log2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.517470] rtai_math: Unknown symbol lgamma_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.518477] rtai_math: Unknown symbol erff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.519235] rtai_math: Unknown symbol scalbnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.519868] rtai_math: Unknown symbol llroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.529870] rtai_math: Unknown symbol fmaxf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.531363] rtai_math: Unknown symbol ilogbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.532282] rtai_math: Unknown symbol jnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.532915] rtai_math: Unknown symbol matherr (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.533966] rtai_math: Unknown symbol jn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.534734] rtai_math: Unknown symbol nextafter (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.535689] rtai_math: Unknown symbol exp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.536430] rtai_math: Unknown symbol lgammaf_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.537349] rtai_math: Unknown symbol tan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.538178] rtai_math: Unknown symbol copysign (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.538814] rtai_math: Unknown symbol acosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.539733] rtai_math: Unknown symbol copysignf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.540501] rtai_math: Unknown symbol atan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.541495] rtai_math: Unknown symbol remainder (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.542282] rtai_math: Unknown symbol asin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.542919] rtai_math: Unknown symbol scalbn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.543844] rtai_math: Unknown symbol atan2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.544598] rtai_math: Unknown symbol log1pf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.545509] rtai_math: Unknown symbol y0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.546300] rtai_math: Unknown symbol j0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.546940] rtai_math: Unknown symbol acosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.547881] rtai_math: Unknown symbol sinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.548598] rtai_math: Unknown symbol scalblnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.549558] rtai_math: Unknown symbol ceilf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.551154] rtai_math: Unknown symbol tanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.551812] rtai_math: Unknown symbol fmaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.552720] rtai_math: Unknown symbol fmax (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.553485] rtai_math: Unknown symbol ilogb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.554401] rtai_math: Unknown symbol llround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.555218] rtai_math: Unknown symbol log2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.555879] rtai_math: Unknown symbol frexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.557555] rtai_math: Unknown symbol atanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.558279] rtai_math: Unknown symbol log1p (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.558933] rtai_math: Unknown symbol __signbitf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.559885] rtai_math: Unknown symbol expf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.560715] rtai_math: Unknown symbol rintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.561724] rtai_math: Unknown symbol llrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.562482] rtai_math: Unknown symbol j0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.563377] rtai_math: Unknown symbol sinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.564159] rtai_math: Unknown symbol floorf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.564830] rtai_math: Unknown symbol nearbyintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.565751] rtai_math: Unknown symbol asinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.566533] rtai_math: Unknown symbol acos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.567518] rtai_math: Unknown symbol hypot (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.568258] rtai_math: Unknown symbol trunc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.568908] rtai_math: Unknown symbol expm1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.569833] rtai_math: Unknown symbol y1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.571212] rtai_math: Unknown symbol logbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.571951] rtai_math: Unknown symbol frexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.572892] rtai_math: Unknown symbol erfc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.573705] rtai_math: Unknown symbol ynf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.574637] rtai_math: Unknown symbol erfcf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.575411] rtai_math: Unknown symbol remquo (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.580006] rtai_math: Unknown symbol expm1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.580803] rtai_math: Unknown symbol fmodf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.581829] rtai_math: Unknown symbol fabs (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.582602] rtai_math: Unknown symbol log (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.583539] rtai_math: Unknown symbol sqrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.584288] rtai_math: Unknown symbol cosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.584962] rtai_math: Unknown symbol asinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.585908] rtai_math: Unknown symbol lroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.586671] rtai_math: Unknown symbol exp2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.587667] rtai_math: Unknown symbol ldexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.588432] rtai_math: Unknown symbol tgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.589367] rtai_math: Unknown symbol logb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.590125] rtai_math: Unknown symbol round (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.590795] rtai_math: Unknown symbol atanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.592397] rtai_math: Unknown symbol remquof (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.593182] rtai_math: Unknown symbol nextafterf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.593848] rtai_math: Unknown symbol powf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.594855] rtai_math: Unknown symbol lround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.595657] rtai_math: Unknown symbol modff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.596586] rtai_math: Unknown symbol tanhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.597342] rtai_math: Unknown symbol ceil (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.597992] rtai_math: Unknown symbol logf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.598942] rtai_math: Unknown symbol floor (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.599727] rtai_math: Unknown symbol j1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.600707] rtai_math: Unknown symbol sqrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.601543] rtai_math: Unknown symbol y0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.602440] rtai_math: Unknown symbol fdimf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.603201] rtai_math: Unknown symbol lgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.603848] rtai_math: Unknown symbol roundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.604775] rtai_math: Unknown symbol truncf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.605582] rtai_math: Unknown symbol ldexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.606566] rtai_math: Unknown symbol yn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.607331] rtai_math: Unknown symbol __fpclassifyf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.607998] rtai_math: Unknown symbol erf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.608918] rtai_math: Unknown symbol scalbln (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.609677] rtai_math: Unknown symbol fabsf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.611331] rtai_math: Unknown symbol gamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.611980] rtai_math: Unknown symbol acoshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.612995] rtai_math: Unknown symbol llrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.613773] rtai_math: Unknown symbol nearbyint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.614716] rtai_math: Unknown symbol remainderf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.615477] rtai_math: Unknown symbol cosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.616380] rtai_math: Unknown symbol __signbit (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.617180] rtai_math: Unknown symbol rint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.617812] rtai_math: Unknown symbol lgammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.618750] rtai_math: Unknown symbol lrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.619525] rtai_math: Unknown symbol lrint (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.620515] rtai_math: Unknown symbol hypotf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.621361] rtai_math: Unknown symbol __fpclassify (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.622299] rtai_math: Unknown symbol j1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.622948] rtai_math: Unknown symbol asinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.623907] rtai_math: Unknown symbol log10f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.624699] rtai_math: Unknown symbol modf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.625607] rtai_math: Unknown symbol y1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.626364] rtai_math: Unknown symbol fmod (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.627280] rtai_math: Unknown symbol cos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.627942] rtai_math: Unknown symbol tanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.628880] rtai_math: Unknown symbol exp2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.629661] rtai_math: Unknown symbol tgamma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.631333] rtai_math: Unknown symbol coshf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.632001] rtai_math: Unknown symbol sin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.632947] rtai_math: Unknown symbol fma (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.633710] rtai_math: Unknown symbol atan2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.634674] rtai_math: Unknown symbol gammaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.636002] rtai_math: Unknown symbol pow (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.638171] rtai_math: Unknown symbol sinh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.638836] rtai_math: Unknown symbol cbrtf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.639765] rtai_math: Unknown symbol atanh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.640527] rtai_math: Unknown symbol log10 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.641527] rtai_math: Unknown symbol fdim (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.642257] rtai_math: Unknown symbol cbrt (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.642908] rtai_math: Unknown symbol log2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.643841] rtai_math: Unknown symbol lgamma_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.644588] rtai_math: Unknown symbol erff (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.645533] rtai_math: Unknown symbol scalbnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.646329] rtai_math: Unknown symbol llroundf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.646985] rtai_math: Unknown symbol fmaxf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.647933] rtai_math: Unknown symbol ilogbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.648690] rtai_math: Unknown symbol jnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.649577] rtai_math: Unknown symbol matherr (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.650391] rtai_math: Unknown symbol jn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.652002] rtai_math: Unknown symbol nextafter (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.652769] rtai_math: Unknown symbol exp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.653699] rtai_math: Unknown symbol lgammaf_r (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.654457] rtai_math: Unknown symbol tan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.655374] rtai_math: Unknown symbol copysign (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.656131] rtai_math: Unknown symbol acosf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.656793] rtai_math: Unknown symbol copysignf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.657729] rtai_math: Unknown symbol atan (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.658483] rtai_math: Unknown symbol remainder (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.659449] rtai_math: Unknown symbol asin (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.660214] rtai_math: Unknown symbol scalbn (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.660861] rtai_math: Unknown symbol atan2f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.661852] rtai_math: Unknown symbol log1pf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.662614] rtai_math: Unknown symbol y0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.663514] rtai_math: Unknown symbol j0 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.664320] rtai_math: Unknown symbol acosh (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.664954] rtai_math: Unknown symbol sinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.665884] rtai_math: Unknown symbol scalblnf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.666639] rtai_math: Unknown symbol ceilf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.667554] rtai_math: Unknown symbol tanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.668348] rtai_math: Unknown symbol fmaf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.669001] rtai_math: Unknown symbol fmax (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.669941] rtai_math: Unknown symbol ilogb (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.670714] rtai_math: Unknown symbol llround (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.672314] rtai_math: Unknown symbol log2 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.672955] rtai_math: Unknown symbol frexpf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.673940] rtai_math: Unknown symbol atanf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.674717] rtai_math: Unknown symbol log1p (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.675632] rtai_math: Unknown symbol __signbitf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.676397] rtai_math: Unknown symbol expf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.677328] rtai_math: Unknown symbol rintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.677979] rtai_math: Unknown symbol llrintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.678896] rtai_math: Unknown symbol j0f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.679665] rtai_math: Unknown symbol sinhf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.680614] rtai_math: Unknown symbol floorf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.681462] rtai_math: Unknown symbol nearbyintf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.682388] rtai_math: Unknown symbol asinf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.683173] rtai_math: Unknown symbol acos (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.683806] rtai_math: Unknown symbol hypot (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.684704] rtai_math: Unknown symbol trunc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.685471] rtai_math: Unknown symbol expm1f (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.686434] rtai_math: Unknown symbol y1 (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.687959] rtai_math: Unknown symbol logbf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.688874] rtai_math: Unknown symbol frexp (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.689633] rtai_math: Unknown symbol erfc (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.690551] rtai_math: Unknown symbol ynf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.701296] rtai_math: Unknown symbol erfcf (err 0)Oct 9 07:51:11 buildroot kern.warn kernel: [ 162.702155] rtai_math: Unknown symbol remquo (err 0)* Regards B.Thiyagarajan

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recvmmsg/sendmmsg not in kernel < Linux 2.6.33
by Lance Fredrickson 09 Oct '18

09 Oct '18

Hi, I'm having an issue where it seems recvmmsg/sendmmsg is being included into the c library regardless of kernel version. I work with kernel versions < 2.6.33 before this feature was included. When compiling applications, autoconf is then mistakenly told from the c-library that recvmmsg/sendmmsg is supported by the kernel, resulting in runtime errors. I use buildroot to compile my toolchains. Looking through uclibc-ng git, it looks like this feature was added with this commit. https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=6e15fafa200666… thanks, Lance Fredrickson

2 3

Re: [uclibc-ng-devel] devel Digest, Vol 52, Issue 2
by Guo Ren 08 Oct '18

08 Oct '18

Hello, On Sat, Oct 06, 2018 at 12:00:02PM +0200, devel-request(a)uclibc-ng.org wrote: > Message: 1 > Date: Fri, 5 Oct 2018 07:48:40 -0600 > From: Lance Fredrickson <lancethepants(a)gmail.com> > To: devel(a)uclibc-ng.org > Subject: [uclibc-ng-devel] Fwd: recvmmsg/sendmmsg not in kernel < > Linux 2.6.33 > Message-ID: <fc65bbd1-8cfa-f4cb-9a5b-25e21a273494(a)gmail.com> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Hi, > > I'm having an issue where it seems recvmmsg/sendmmsg is being included > into the c library regardless of kernel version. I work with kernel > versions < 2.6.33 before this feature was included. When compiling > applications, autoconf is then mistakenly told from the c-library that > recvmmsg/sendmmsg is supported by the kernel, resulting in runtime > errors. I use buildroot to compile my toolchains. > > Looking through uclibc-ng git, it looks like this feature was added with > this commit. > https://cgit.uclibc-ng.org/cgi/cgit/uclibc-ng.git/commit/?id=6e15fafa200666… +# ifdef __NR_recvmmsg ^^^^^^^^^^^^^ + return (ssize_t)INLINE_SYSCALL(recvmmsg, 5, sockfd, msg, vlen, flags, tmo); +# else ...... + return (ssize_t)__socketcall(SYS_RECVMMSG, args); +# endif +} You kernel define __NR_recvmmsg in unistd.h ? Best Regards Guo Ren

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devel October 2018