May 2017 - devel - example.com

[PATCH] include/features.h: add _DEFAULT_SOURCE macro
by Anthony G. Basile 22 Jun '17

22 Jun '17

From: "Anthony G. Basile" <blueness(a)gentoo.org> man feature_test_macros(7) specifies that _BSD_SOURCE and _SVID_SOURCE have been deprecated in favor of _DEFAULT_SOURCE since libc 2.20. Specifying either of the former is now equivalent to specifying just the latter. We add this macro to conform to this standard, but do not add the compiler warning to maintain full backwards compatibility with earlier version of glibc and uclibc. Signed-off-by: Anthony G. Basile <blueness(a)gentoo.org> --- include/features.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/features.h b/include/features.h index f9820791b..362b811fd 100644 --- a/include/features.h +++ b/include/features.h @@ -40,6 +40,7 @@ _SVID_SOURCE ISO C, POSIX, and SVID things. _ATFILE_SOURCE Additional *at interfaces. _GNU_SOURCE All of the above, plus GNU extensions. + _DEFAULT_SOURCE Equivalent to defining _BSD_SOURCE and _SVID_SOURCE. _REENTRANT Select additionally reentrant object. _THREAD_SAFE Same as _REENTRANT, often used by other systems. _FORTIFY_SOURCE If set to numeric value > 0 additional security @@ -140,6 +141,19 @@ # define __GNUC_PREREQ(maj, min) 0 #endif +/* _DEFAULT_SOURCE is equivalent to defining _BSD_SOURCE and _SVID_SOURCE + * and vice versa. */ +#ifdef _DEFAULT_SOURCE +# undef _BSD_SOURCE +# define _BSD_SOURCE 1 +# undef _SVID_SOURCE +# define _SVID_SOURCE 1 +#endif + +#if defined _BSD_SOURCE || defined _SVID_SOURCE +# undef _DEFAULT_SOURCE +# define _DEFAULT_SOURCE 1 +#endif /* If _BSD_SOURCE was defined by the user, favor BSD over POSIX. */ #if defined _BSD_SOURCE && \ -- 2.13.0

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[PATCH] include/sys/reboot.h: add constants RB_SW_SUSPEND and RB_KEXEC
by Anthony G. Basile 22 May '17

22 May '17

From: "Anthony G. Basile" <blueness(a)gentoo.org> This syncs up <sys/reboot.h> with the GNU C library, see their commit 1a09dc56. These constants are needed by init systems like openrc. Signed-off-by: Anthony G. Basile <blueness(a)gentoo.org> --- include/sys/reboot.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/sys/reboot.h b/include/sys/reboot.h index bc685aebb..fafd2fb0c 100644 --- a/include/sys/reboot.h +++ b/include/sys/reboot.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -38,6 +38,12 @@ /* Stop system and switch power off if possible. */ #define RB_POWER_OFF 0x4321fedc +/* Suspend system using software suspend. */ +#define RB_SW_SUSPEND 0xd000fce2 + +/* Reboot system into new kernel. */ +#define RB_KEXEC 0x45584543 + __BEGIN_DECLS /* Reboot or halt the system. */ -- 2.13.0

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[PATCH] include/sys/reboot.h: add constants RB_SW_SUSPEND and RB_KEXEC
by Anthony G. Basile 22 May '17

22 May '17

This syncs up <sys/reboot.h> with the GNU C library, see their commit 1a09dc56. These constants are needed by init systems like openrc. Signed-off-by: Anthony G. Basile <blueness(a)gentoo.org> --- include/sys/reboot.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/sys/reboot.h b/include/sys/reboot.h index bc685aebb..fafd2fb0c 100644 --- a/include/sys/reboot.h +++ b/include/sys/reboot.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -38,6 +38,12 @@ /* Stop system and switch power off if possible. */ #define RB_POWER_OFF 0x4321fedc +/* Suspend system using software suspend. */ +#define RB_SW_SUSPEND 0xd000fce2 + +/* Reboot system into new kernel. */ +#define RB_KEXEC 0x45584543 + __BEGIN_DECLS /* Reboot or halt the system. */ -- 2.13.0

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[PATCH] include/sys/reboot.h: add constants RB_SW_SUSPEND and RB_KEXEC
by Anthony G. Basile 22 May '17

22 May '17

This syncs up <sys/reboot.h> with the GNU C library, see their commit 1a09dc56. These constants are needed by init systems like openrc. Signed-off-by: Anthony G. Basile <blueness(a)gentoo.org> --- include/sys/reboot.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/include/sys/reboot.h b/include/sys/reboot.h index bc685aebb..fafd2fb0c 100644 --- a/include/sys/reboot.h +++ b/include/sys/reboot.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1996-2017 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -38,6 +38,12 @@ /* Stop system and switch power off if possible. */ #define RB_POWER_OFF 0x4321fedc +/* Suspend system using software suspend. */ +#define RB_SW_SUSPEND 0xd000fce2 + +/* Reboot system into new kernel. */ +#define RB_KEXEC 0x45584543 + __BEGIN_DECLS /* Reboot or halt the system. */ -- 2.13.0

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[PATCH] pthread_getcpuclockid.c: fix clockid calculation
by Sergey Korolev 12 May '17

12 May '17

Current uClibc-ng version incorrectly calculates clockid in pthread_getcpuclockid (at least for modern kernels). The simplest test program #include <time.h> #include <errno.h> #include <stdio.h> #include <stdlib.h> #include <pthread.h> int main() { clockid_t clk; struct timespec ts; const int err = pthread_getcpuclockid(pthread_self(), &clk); if (err != 0) { errno = err; perror("pthread_getcpuclockid"); return EXIT_FAILURE; } if (clock_gettime(clk, &ts) == -1) { perror("clock_gettime"); return EXIT_FAILURE; } printf("Thread time is %lu.%06lu.\n", ts.tv_sec, ts.tv_nsec / 1000); return EXIT_SUCCESS; } fails with clock_gettime: Invalid argument Tested on Linux 3.4 / MIPS built with GCC 5.4.0. Other implementations, for example musl, use a simple calculation https://git.musl-libc.org/cgit/musl/tree/src/thread/pthread_getcpuclockid.c Looks strange, but the official glibc repository https://sourceware.org/git/?p=glibc.git;a=blob_plain;f=nptl/pthread_getcpuc… has the same implementation as in uClibc-ng. This fork https://github.com/lattera/glibc/blob/master/nptl/sysdeps/unix/sysv/linux/p… use more accurate approach relying on __NR_clock_getres (defined in the kernel since 2.6.24) with MAKE_THREAD_CPUCLOCK macro copied from the kernel ( http://lxr.free-electrons.com/source/include/linux/posix-timers.h?v=2.6.24#…, Linux 4.10 has the same one). I propose an intermediate solution: use MAKE_THREAD_CPUCLOCK like computation of clockid when __NR_clock_getres defined and do a fallback to an older implementation when not.

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Conflict between uClibc-ng if_arp.h and kernel headers since Linux 4.11 ?
by Thomas Petazzoni 09 May '17

09 May '17

Hello, Since a few days, we are seeing build failures of the radvd package in Buildroot: http://autobuild.buildroot.net/?reason=radvd-2.12 The build failure is: /home/buildroot/autobuild/run/instance-2/output/host/usr/arc-buildroot-linux-uclibc/sysroot/usr/include/linux/if_arp.h:121:8: error: redefinition of 'struct arpreq_old' struct arpreq_old { ^~~~~~~~~~ In file included from includes.h:90:0, from recv.c:17: /home/buildroot/autobuild/run/instance-2/output/host/usr/arc-buildroot-linux-uclibc/sysroot/usr/include/net/if_arp.h:147:8: note: originally defined here struct arpreq_old ^~~~~~~~~~ [...] The build failures happens with uClibc-ng toolchains in combination with Linux 4.11 kernel headers, so it seems to be a new thing caused by Linux 4.11 headers. However the kernel Git history doesn't show any change on this header file between 4.10 and 4.11. Any idea? Thanks, Thomas -- Thomas Petazzoni, CTO, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com

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