On Thu, May 19, 2016 at 8:24 PM, Lance Fredrickson lancethepants@gmail.com wrote:
If not helpful in this case, using --with-sysroot should at least help with other corner cases like I've encountered.
Agree, this may prove be helpful: it limits the locations where ld searchs libs by default to /opt/lib and /opt/usr/lib, which is good.
After I applied gcc-5.3.0-specs-1.patch (https://github.com/lancethepants/tomatoware/blob/ee309db223572ccd1ddc2d58a2a...) patch and rebuilt glibc with proper prefix (uClibc-ng targets had correct prefix already), gcc works without additional flags fine now, so I removed the dirty wrappers. However, uClibc-ng targets still suffer from the atexit issue:
root@unknown:/tmp/home/root# gcc hello.c -o hello -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/lto-wrapper Target: arm-buildroot-linux-uclibcgnueabi Configured with: ../gcc-5.3.0/configure --build=x86_64-pc-linux-gnu --host=arm-buildroot-linux-uclibcgnueabi --target=arm-buildroot-linux-uclibcgnueabi --prefix=/opt --disable-nls --disable-static --with-as=/home/jenkins/Optware-ng/buildroot-armeabi-ng/toolchain/buildroot-arm-linux-2.6.36-uclibc-ng-5.3.0/bin/arm-buildroot-linux-uclibcgnueabi-as --with-ld=/home/jenkins/Optware-ng/buildroot-armeabi-ng/toolchain/buildroot-arm-linux-2.6.36-uclibc-ng-5.3.0/bin/arm-buildroot-linux-uclibcgnueabi-ld --enable-languages=c,c++ --disable-multilib --with-gxx-include-dir=/opt/include/c++/5.3.0 --disable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-libsanitizer --enable-tls --disable-libmudflap --enable-threads --without-isl --without-cloog --with-float=soft --disable-decimal-float --with-abi=aapcs-linux --with-cpu=cortex-a9 --with-mode=arm --enable-shared --disable-libgomp --with-gmp=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-mpfr=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-mpc=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-default-libstdcxx-abi=gcc4-compatible --with-system-zlib Thread model: posix gcc version 5.3.0 (GCC) COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/cc1 -quiet -v -imultilib . -imultiarch arm-linux-gnueabi hello.c -quiet -dumpbase hello.c -mcpu=cortex-a9 -mfloat-abi=soft -mabi=aapcs-linux -marm -mtls-dialect=gnu -auxbase hello -version -o /tmp/cc6Ys36c.s GNU C11 (GCC) version 5.3.0 (arm-buildroot-linux-uclibcgnueabi) compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 ignoring nonexistent directory "/usr/local/include/arm-linux-gnueabi" ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/include" ignoring nonexistent directory "/usr/include/arm-linux-gnueabi" ignoring nonexistent directory "/usr/include" #include "..." search starts here: #include <...> search starts here: /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/include /opt/include /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/include-fixed End of search list. GNU C11 (GCC) version 5.3.0 (arm-buildroot-linux-uclibcgnueabi) compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: 2407f8e2f7e722b4fd559f0775bed36e COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/as -v -mcpu=cortex-a9 -mfloat-abi=soft -meabi=5 -o /tmp/ccJeIKY3.o /tmp/cc6Ys36c.s GNU assembler version 2.25.1 (arm-buildroot-linux-uclibcgnueabi) using BFD version (GNU Binutils) 2.25.1 COMPILER_PATH=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ LIBRARY_PATH=/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/collect2 -plugin /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/liblto_plugin.so -plugin-opt=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/lto-wrapper -plugin-opt=-fresolution=/tmp/cca2Pva6.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --eh-frame-hdr -dynamic-linker /opt/lib/ld-uClibc.so.1 -X -m armelf_linux_eabi -o hello /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crt1.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crti.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/crtbegin.o -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0 -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../.. /tmp/ccJeIKY3.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/crtend.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crtn.o /tmp/ccJeIKY3.o: In function `main': hello.c:(.text+0x44): undefined reference to `atexit' collect2: error: ld returned 1 exit status
Waldemar, or somebody, is there a way I can debug this further? Sorry if this turns out to be uClibc-ng unrelated and I'm spamming the list, but for some reason it happens with uClibc-ng targets only.
Thank you, Alex
Hi Alex, Alex Potapenko wrote,
On Thu, May 19, 2016 at 8:24 PM, Lance Fredrickson lancethepants@gmail.com wrote:
If not helpful in this case, using --with-sysroot should at least help with other corner cases like I've encountered.
Agree, this may prove be helpful: it limits the locations where ld searchs libs by default to /opt/lib and /opt/usr/lib, which is good.
After I applied gcc-5.3.0-specs-1.patch (https://github.com/lancethepants/tomatoware/blob/ee309db223572ccd1ddc2d58a2a...) patch and rebuilt glibc with proper prefix (uClibc-ng targets had correct prefix already), gcc works without additional flags fine now, so I removed the dirty wrappers. However, uClibc-ng targets still suffer from the atexit issue:
root@unknown:/tmp/home/root# gcc hello.c -o hello -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/lto-wrapper Target: arm-buildroot-linux-uclibcgnueabi Configured with: ../gcc-5.3.0/configure --build=x86_64-pc-linux-gnu --host=arm-buildroot-linux-uclibcgnueabi --target=arm-buildroot-linux-uclibcgnueabi --prefix=/opt --disable-nls --disable-static --with-as=/home/jenkins/Optware-ng/buildroot-armeabi-ng/toolchain/buildroot-arm-linux-2.6.36-uclibc-ng-5.3.0/bin/arm-buildroot-linux-uclibcgnueabi-as --with-ld=/home/jenkins/Optware-ng/buildroot-armeabi-ng/toolchain/buildroot-arm-linux-2.6.36-uclibc-ng-5.3.0/bin/arm-buildroot-linux-uclibcgnueabi-ld --enable-languages=c,c++ --disable-multilib --with-gxx-include-dir=/opt/include/c++/5.3.0 --disable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-libsanitizer --enable-tls --disable-libmudflap --enable-threads --without-isl --without-cloog --with-float=soft --disable-decimal-float --with-abi=aapcs-linux --with-cpu=cortex-a9 --with-mode=arm --enable-shared --disable-libgomp --with-gmp=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-mpfr=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-mpc=/home/jenkins/Optware-ng/buildroot-armeabi-ng/staging/opt --with-default-libstdcxx-abi=gcc4-compatible --with-system-zlib Thread model: posix gcc version 5.3.0 (GCC) COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/cc1 -quiet -v -imultilib . -imultiarch arm-linux-gnueabi hello.c -quiet -dumpbase hello.c -mcpu=cortex-a9 -mfloat-abi=soft -mabi=aapcs-linux -marm -mtls-dialect=gnu -auxbase hello -version -o /tmp/cc6Ys36c.s GNU C11 (GCC) version 5.3.0 (arm-buildroot-linux-uclibcgnueabi) compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 ignoring nonexistent directory "/usr/local/include/arm-linux-gnueabi" ignoring nonexistent directory "/usr/local/include" ignoring nonexistent directory "/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/include" ignoring nonexistent directory "/usr/include/arm-linux-gnueabi" ignoring nonexistent directory "/usr/include" #include "..." search starts here: #include <...> search starts here: /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/include /opt/include /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/include-fixed End of search list. GNU C11 (GCC) version 5.3.0 (arm-buildroot-linux-uclibcgnueabi) compiled by GNU C version 5.3.0, GMP version 6.0.0, MPFR version 3.1.3, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: 2407f8e2f7e722b4fd559f0775bed36e COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/as -v -mcpu=cortex-a9 -mfloat-abi=soft -meabi=5 -o /tmp/ccJeIKY3.o /tmp/cc6Ys36c.s GNU assembler version 2.25.1 (arm-buildroot-linux-uclibcgnueabi) using BFD version (GNU Binutils) 2.25.1 COMPILER_PATH=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ LIBRARY_PATH=/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/:/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../:/lib/:/usr/lib/ COLLECT_GCC_OPTIONS='-o' 'hello' '-v' '-mcpu=cortex-a9' '-mfloat-abi=soft' '-mabi=aapcs-linux' '-marm' '-mtls-dialect=gnu' /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/collect2 -plugin /opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/liblto_plugin.so -plugin-opt=/opt/libexec/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/lto-wrapper -plugin-opt=-fresolution=/tmp/cca2Pva6.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --eh-frame-hdr -dynamic-linker /opt/lib/ld-uClibc.so.1 -X -m armelf_linux_eabi -o hello /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crt1.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crti.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/crtbegin.o -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0 -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib -L/opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../.. /tmp/ccJeIKY3.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/crtend.o /opt/lib/gcc/arm-buildroot-linux-uclibcgnueabi/5.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/lib/crtn.o /tmp/ccJeIKY3.o: In function `main': hello.c:(.text+0x44): undefined reference to `atexit' collect2: error: ld returned 1 exit status
Waldemar, or somebody, is there a way I can debug this further? Sorry if this turns out to be uClibc-ng unrelated and I'm spamming the list, but for some reason it happens with uClibc-ng targets only.
I think it is on topic. I have cross-compiled gcc and the resulting gcc with prefix /usr can build hello.c.
Have you tried to add --with-sysroot/--with-build-sysroot while configuring gcc? I normally use it on the host to build a relocatable cross-compiler, but I think it might be a solution for non-standard location, too.
For further debugging you could strace -f -e open -o log to see if still something in /lib is opened while linking.
best regards Waldemar
Hi Waldemar!
On Sat, May 21, 2016 at 10:35 AM, Waldemar Brodkorb wbx@uclibc-ng.org wrote:
I think it is on topic. I have cross-compiled gcc and the resulting gcc with prefix /usr can build hello.c.
Have you tried to add --with-sysroot/--with-build-sysroot while configuring gcc? I normally use it on the host to build a relocatable cross-compiler, but I think it might be a solution for non-standard location, too.
I just tried it, it doesn't help:
root@unknown:/tmp/home/root# gcc hello.c -I/opt/include /tmp/cc2Z3b02.o: In function `main': hello.c:(.text+0x44): undefined reference to `atexit' collect2: error: ld returned 1 exit status
(after setting --with-sysroot option, gcc requires '-I/opt/include' flag)
For further debugging you could strace -f -e open -o log to see if still something in /lib is opened while linking.
It doesn't seem to use anything beyond '/opt/...' (used the sed expression to get rid of those '/../'): see log.txt.
Anything else I can try?
Thank you!
Hi Alex, Alex Potapenko wrote,
Hi Waldemar!
On Sat, May 21, 2016 at 10:35 AM, Waldemar Brodkorb wbx@uclibc-ng.org wrote:
I think it is on topic. I have cross-compiled gcc and the resulting gcc with prefix /usr can build hello.c.
Have you tried to add --with-sysroot/--with-build-sysroot while configuring gcc? I normally use it on the host to build a relocatable cross-compiler, but I think it might be a solution for non-standard location, too.
I just tried it, it doesn't help:
root@unknown:/tmp/home/root# gcc hello.c -I/opt/include /tmp/cc2Z3b02.o: In function `main': hello.c:(.text+0x44): undefined reference to `atexit' collect2: error: ld returned 1 exit status
(after setting --with-sysroot option, gcc requires '-I/opt/include' flag)
For further debugging you could strace -f -e open -o log to see if still something in /lib is opened while linking.
It doesn't seem to use anything beyond '/opt/...' (used the sed expression to get rid of those '/../'): see log.txt.
Anything else I can try?
Indeed I have an idea. I remember now the dirty details. Can you show me your libc.so file? How does it look like?
It shouldn't be a simple symlink, libc.so is special and needs to be a linker file!
I think your existing linker file points to the wrong uClibc-ng files.
best regards Waldemar
On Sat, May 21, 2016 at 12:06 PM, Waldemar Brodkorb wbx@uclibc-ng.org wrote:
Indeed I have an idea. I remember now the dirty details. Can you show me your libc.so file? How does it look like?
It shouldn't be a simple symlink, libc.so is special and needs to be a linker file!
I think your existing linker file points to the wrong uClibc-ng files.
Bingo! libc.so was a link. I changed it to linker file, similar to the one from the toolchain:
/* GNU ld script
- Use the shared library, but some functions are only in
- the static library, so try that secondarily. */
OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm") GROUP ( /lib/uclibc_nonshared.a /lib/libc.so.1 AS_NEEDED ( /lib/ld-uClibc.so.1 ) )
And it's all good now! It was not a uClibc-ng issue, but packaging issue.
Thank you for your help! Alex
-
Alex Potapenko -
Waldemar Brodkorb