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2025-01-01Update copyright dates with scripts/update-copyrightsPaul Eggert52-52/+52
2024-12-14tst-minsigstksz-1.c: Return EXIT_UNSUPPORTED for GCC 4.9 or olderH.J. Lu1-1/+1
Since ATOMIC_INT_LOCK_FREE in GCC 4.9 is defined as #define ATOMIC_INT_LOCK_FREE \ __atomic_type_lock_free (atomic_int) GCC 4.9 fails to compile tst-minsigstksz-1.c: tst-minsigstksz-1.c:45:6: error: missing binary operator before token "(" # if ATOMIC_INT_LOCK_FREE != 2 ^ Change tst-minsigstksz-1.c to define TEST_ATOMIC_OPS to 0 for GCC 4.9 or older. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Sam James <sam@gentoo.org>
2024-10-08stdlib: Make abort/_Exit AS-safe (BZ 26275)Adhemerval Zanella1-2/+13
The recursive lock used on abort does not synchronize with a new process creation (either by fork-like interfaces or posix_spawn ones), nor it is reinitialized after fork(). Also, the SIGABRT unblock before raise() shows another race condition, where a fork or posix_spawn() call by another thread, just after the recursive lock release and before the SIGABRT signal, might create programs with a non-expected signal mask. With the default option (without POSIX_SPAWN_SETSIGDEF), the process can see SIG_DFL for SIGABRT, where it should be SIG_IGN. To fix the AS-safe, raise() does not change the process signal mask, and an AS-safe lock is used if a SIGABRT is installed or the process is blocked or ignored. With the signal mask change removal, there is no need to use a recursive loc. The lock is also taken on both _Fork() and posix_spawn(), to avoid the spawn process to see the abort handler as SIG_DFL. A read-write lock is used to avoid serialize _Fork and posix_spawn execution. Both sigaction (SIGABRT) and abort() requires to lock as writer (since both change the disposition). The fallback is also simplified: there is no need to use a loop of ABORT_INSTRUCTION after _exit() (if the syscall does not terminate the process, the system is broken). The proposed fix changes how setjmp works on a SIGABRT handler, where glibc does not save the signal mask. So usage like the below will now always abort. static volatile int chk_fail_ok; static jmp_buf chk_fail_buf; static void handler (int sig) { if (chk_fail_ok) { chk_fail_ok = 0; longjmp (chk_fail_buf, 1); } else _exit (127); } [...] signal (SIGABRT, handler); [....] chk_fail_ok = 1; if (! setjmp (chk_fail_buf)) { // Something that can calls abort, like a failed fortify function. chk_fail_ok = 0; printf ("FAIL\n"); } Such cases will need to use sigsetjmp instead. The _dl_start_profile calls sigaction through _profil, and to avoid pulling abort() on loader the call is replaced with __libc_sigaction. Checked on x86_64-linux-gnu and aarch64-linux-gnu. Reviewed-by: DJ Delorie <dj@redhat.com>
2024-07-01signal/Makefile: Split and sort testsMichel Lind1-5/+16
This will make it easier to add tests later; see also the test section in malloc/Makefile that inspires this. Signed-off-by: Michel Lind <salimma@fedoraproject.org> Suggested-by: Arjun Shankar <arjun@redhat.com> Reviewed-by: Arjun Shankar <arjun@redhat.com>
2024-04-02Always define __USE_TIME_BITS64 when 64 bit time_t is usedAdhemerval Zanella1-1/+1
It was raised on libc-help [1] that some Linux kernel interfaces expect the libc to define __USE_TIME_BITS64 to indicate the time_t size for the kABI. Different than defined by the initial y2038 design document [2], the __USE_TIME_BITS64 is only defined for ABIs that support more than one time_t size (by defining the _TIME_BITS for each module). The 64 bit time_t redirects are now enabled using a different internal define (__USE_TIME64_REDIRECTS). There is no expected change in semantic or code generation. Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and arm-linux-gnueabi [1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html [2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign Reviewed-by: DJ Delorie <dj@redhat.com>
2024-03-27signal: Avoid system signal disposition to interfere with testsAdhemerval Zanella1-0/+4
Both tst-sigset2 and tst-signal1 expectes that SIGINT disposition is set to SIG_DFL.
2024-03-12linux/sigsetops: fix type confusion (bug 31468)Andreas Schwab1-0/+11
Each mask in the sigset array is an unsigned long, so fix __sigisemptyset to use that instead of int. The __sigword function returns a simple array index, so it can return int instead of unsigned long.
2024-01-01Update copyright dates with scripts/update-copyrightsPaul Eggert52-52/+52
2023-01-06Update copyright dates with scripts/update-copyrightsJoseph Myers52-52/+52
2022-06-30Refactor internal-signals.hAdhemerval Zanella4-4/+4
The main drive is to optimize the internal usage and required size when sigset_t is embedded in other data structures. On Linux, the current supported signal set requires up to 8 bytes (16 on mips), was lower than the user defined sigset_t (128 bytes). A new internal type internal_sigset_t is added, along with the functions to operate on it similar to the ones for sigset_t. The internal-signals.h is also refactored to remove unused functions Besides small stack usage on some functions (posix_spawn, abort) it lower the struct pthread by about 120 bytes (112 on mips). Checked on x86_64-linux-gnu. Reviewed-by: Arjun Shankar <arjun@redhat.com>
2022-01-01Update copyright dates with scripts/update-copyrightsPaul Eggert52-52/+52
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2021-09-03Remove "Contributed by" linesSiddhesh Poyarekar5-5/+0
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2021-06-15y2038: Add support for 64-bit time on legacy ABIsAdhemerval Zanella1-0/+13
A new build flag, _TIME_BITS, enables the usage of the newer 64-bit time symbols for legacy ABI (where 32-bit time_t is default). The 64 bit time support is only enabled if LFS (_FILE_OFFSET_BITS=64) is also used. Different than LFS support, the y2038 symbols are added only for the required ABIs (armhf, csky, hppa, i386, m68k, microblaze, mips32, mips64-n32, nios2, powerpc32, sparc32, s390-32, and sh). The ABIs with 64-bit time support are unchanged, both for symbol and types redirection. On Linux the full 64-bit time support requires a minimum of kernel version v5.1. Otherwise, the 32-bit fallbacks are used and might results in error with overflow return code (EOVERFLOW). The i686-gnu does not yet support 64-bit time. This patch exports following rediretions to support 64-bit time: * libc: adjtime adjtimex clock_adjtime clock_getres clock_gettime clock_nanosleep clock_settime cnd_timedwait ctime ctime_r difftime fstat fstatat futimens futimes futimesat getitimer getrusage gettimeofday gmtime gmtime_r localtime localtime_r lstat_time lutimes mktime msgctl mtx_timedlock nanosleep nanosleep ntp_gettime ntp_gettimex ppoll pselec pselect pthread_clockjoin_np pthread_cond_clockwait pthread_cond_timedwait pthread_mutex_clocklock pthread_mutex_timedlock pthread_rwlock_clockrdlock pthread_rwlock_clockwrlock pthread_rwlock_timedrdlock pthread_rwlock_timedwrlock pthread_timedjoin_np recvmmsg sched_rr_get_interval select sem_clockwait semctl semtimedop sem_timedwait setitimer settimeofday shmctl sigtimedwait stat thrd_sleep time timegm timerfd_gettime timerfd_settime timespec_get utime utimensat utimes utimes wait3 wait4 * librt: aio_suspend mq_timedreceive mq_timedsend timer_gettime timer_settime * libanl: gai_suspend Reviewed-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
2021-03-26nptl: Remove __libc_allocate_rtsig, __libc_current_sigrtmax, and ↵Adhemerval Zanella1-8/+1
__libc_current_sigrtmin The libc version is identical and built with same flags. Checked on x86_64-linux-gnu.
2021-03-26nptl: Move sigaction to libcAdhemerval Zanella1-0/+3
The libc version is identical and built with same flags. Checked on x86_64-linux-gnu.
2021-03-18signal: Add __libc_sigactionAdhemerval Zanella3-6/+35
The generic implementation basically handle the system agnostic logic (filtering out the invalid signals) while the __libc_sigaction is the function with implements the system and architecture bits. Checked on x86_64-linux-gnu and i686-linux-gnu.
2021-02-01sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305]H.J. Lu3-2/+88
Add _SC_MINSIGSTKSZ for the minimum signal stack size derived from AT_MINSIGSTKSZ, which is the minimum number of bytes of free stack space required in order to gurantee successful, non-nested handling of a single signal whose handler is an empty function, and _SC_SIGSTKSZ which is the suggested minimum number of bytes of stack space required for a signal stack. If AT_MINSIGSTKSZ isn't available, sysconf (_SC_MINSIGSTKSZ) returns MINSIGSTKSZ. On Linux/x86 with XSAVE, the signal frame used by kernel is composed of the following areas and laid out as: ------------------------------ | alignment padding | ------------------------------ | xsave buffer | ------------------------------ | fsave header (32-bit only) | ------------------------------ | siginfo + ucontext | ------------------------------ Compute AT_MINSIGSTKSZ value as size of xsave buffer + size of fsave header (32-bit only) + size of siginfo and ucontext + alignment padding. If _SC_SIGSTKSZ_SOURCE or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are redefined as /* Default stack size for a signal handler: sysconf (SC_SIGSTKSZ). */ # undef SIGSTKSZ # define SIGSTKSZ sysconf (_SC_SIGSTKSZ) /* Minimum stack size for a signal handler: SIGSTKSZ. */ # undef MINSIGSTKSZ # define MINSIGSTKSZ SIGSTKSZ Compilation will fail if the source assumes constant MINSIGSTKSZ or SIGSTKSZ. The reason for not simply increasing the kernel's MINSIGSTKSZ #define (apart from the fact that it is rarely used, due to glibc's shadowing definitions) was that userspace binaries will have baked in the old value of the constant and may be making assumptions about it. For example, the type (char [MINSIGSTKSZ]) changes if this #define changes. This could be a problem if an newly built library tries to memcpy() or dump such an object defined by and old binary. Bounds-checking and the stack sizes passed to things like sigaltstack() and makecontext() could similarly go wrong.
2021-01-02Update copyright dates with scripts/update-copyrightsPaul Eggert50-50/+50
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
2020-11-13Remove tls.h inclusion from internal errno.hAdhemerval Zanella2-0/+2
The tls.h inclusion is not really required and limits possible definition on more arch specific headers. This is a cleanup to allow inline functions on sysdep.h, more specifically on i386 and ia64 which requires to access some tls definitions its own. No semantic changes expected, checked with a build against all affected ABIs.
2020-07-07signal: Move sys_siglist to a compat symbolAdhemerval Zanella1-6/+0
The symbol was deprecated by strsignal and its usage imposes issues such as copy relocations. Its internal name is changed to __sys_siglist and __sys_sigabbrev to avoid static linking usage. The compat code is also refactored, since both Linux and Hurd usage the same strategy: export the same array with different object sizes. The libSegfault change avoids calling strsignal on the SIGFAULT signal handler (the current usage is already sketchy, adding a call that potentially issue locale internal function is even sketchier). Checked on x86_64-linux-gnu and i686-linux-gnu. I also run a check-abi on all affected platforms. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2020-07-07signal: Add signum-{generic,arch}.hAdhemerval Zanella2-2/+2
It refactor how signals are defined by each architecture. Instead of include a generic header (bits/signum-generic.h) and undef non-default values in an arch specific header (bits/signum.h) the new scheme uses a common definition (bits/signum-generic.h) and each architectures add its specific definitions on a new header (bits/signum-arch.h). For Linux it requires copy some system default definitions to alpha, hppa, and sparc. They are historical values and newer ports uses the generic Linux signum-arch.h. For Hurd the BSD signum is removed and moved to a new header (it is used currently only on Hurd). Checked on a build against all affected ABIs. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
2020-05-25signal: Deprecate additional legacy signal handling functionsFlorian Weimer3-7/+23
This needs a few test adjustments: In some cases, sigignore was used for convenience (replaced with xsignal with SIG_IGN). Tests for the deprecated functions need to disable -Wdeprecated-declarations, and for the sigmask deprecation, -Wno-error. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2020-05-08signal: Use <sigsetops.h> for sigemptyset, sigfillsetFlorian Weimer2-7/+4
This avoids changing the entire sigset_t structure. Updating the actually used part is sufficient.
2020-04-21signal: Only handle on NSIG signals on signal functions (BZ #25657)Adhemerval Zanella3-6/+102
The upper bits of the sigset_t s not fully initialized in the signal mask calls that return information from kernel (sigprocmask, sigpending, and pthread_sigmask), since the exported sigset_t size (1024 bits) is larger than Linux support one (64 or 128 bits). It might make sigisemptyset/sigorset/sigandset fail if the mask is filled prior the call. This patch changes the internal signal function to handle up to supported Linux signal number (_NSIG), the remaining bits are untouched. Checked on x86_64-linux-gnu and i686-linux-gnu.
2020-01-24Build raise with -fasynchronous-unwind-tables.Joseph Myers1-0/+1
In testing glibc for Arm and MIPS, I see: FAIL: misc/tst-sigcontext-get_pc If this test - backtracing through a call to raise - is valid, then raise needs to be built with -fasynchronous-unwind-tables (as the test itself is) to have the required unwind information for that backtracing to work. Adding that option, which this patch does, causes the test for pass for Arm. For MIPS, the test still does not pass (the backtrace has an address that is 2 bytes after the "address in signal handler", for unknown reasons), although the patch allows a longer backtrace to be produced.
2020-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers49-49/+49
2019-09-07Prefer https to http for gnu.org and fsf.org URLsPaul Eggert49-49/+49
Also, change sources.redhat.com to sourceware.org. This patch was automatically generated by running the following shell script, which uses GNU sed, and which avoids modifying files imported from upstream: sed -ri ' s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g ' \ $(find $(git ls-files) -prune -type f \ ! -name '*.po' \ ! -name 'ChangeLog*' \ ! -path COPYING ! -path COPYING.LIB \ ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \ ! -path manual/texinfo.tex ! -path scripts/config.guess \ ! -path scripts/config.sub ! -path scripts/install-sh \ ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \ ! -path INSTALL ! -path locale/programs/charmap-kw.h \ ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \ ! '(' -name configure \ -execdir test -f configure.ac -o -f configure.in ';' ')' \ ! '(' -name preconfigure \ -execdir test -f preconfigure.ac ';' ')' \ -print) and then by running 'make dist-prepare' to regenerate files built from the altered files, and then executing the following to cleanup: chmod a+x sysdeps/unix/sysv/linux/riscv/configure # Omit irrelevant whitespace and comment-only changes, # perhaps from a slightly-different Autoconf version. git checkout -f \ sysdeps/csky/configure \ sysdeps/hppa/configure \ sysdeps/riscv/configure \ sysdeps/unix/sysv/linux/csky/configure # Omit changes that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines git checkout -f \ sysdeps/powerpc/powerpc64/ppc-mcount.S \ sysdeps/unix/sysv/linux/s390/s390-64/syscall.S # Omit change that caused a pre-commit check to fail like this: # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-05-14Linux: Add the tgkill functionFlorian Weimer2-1/+4
The tgkill function is sometimes used in crash handlers. <bits/signal_ext.h> follows the same approach as <bits/unistd_ext.h> (which was added for the gettid system call wrapper). Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2019-01-18Disable lazy binding on tests for minimal signal handlerH.J. Lu1-0/+8
Since MINSIGSTKSZ may not have sufficent stack space to allow lazy binding, build tests for minimal signal handler with -Wl,-z,now to disable lazy binding. * signal/Makefile (LDFLAGS-tst-minsigstksz-1): New. Set to -Wl,-z,now. (LDFLAGS-tst-minsigstksz-2): Likewise. (LDFLAGS-tst-minsigstksz-3): Likewise. (LDFLAGS-tst-minsigstksz-3a): Likewise. (LDFLAGS-tst-minsigstksz-4): Likewise. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
2019-01-16Tests for minimal signal handler functionality in MINSIGSTKSZ space.Zack Weinberg6-0/+397
There is general agreement that the very short list of things that ISO C says you can do in an async signal handler should all work when the handler is running on an alternate signal stack with only MINSIGSTKSZ space. This patch adds tests to make sure those things do work. To facilitate this, there is a new set of test support routines for setting up alternate signal stacks; see support/xsignal.h for the API. * support/xsignal.h (xalloc_sigstack, xfree_sigstack) (xget_sigstack_location): New test support functions. * support/xsigstack.c: New file, implementing them. * support/tst-xsigstack.c: New test for them. * support/Makefile: Update. * signal/tst-minsigstksz-1.c * signal/tst-minsigstksz-2.c * signal/tst-minsigstksz-3.c * signal/tst-minsigstksz-3a.c * signal/tst-minsigstksz-4.c: New tests. * signal/Makefile: Run them.
2019-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers44-44/+44
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
2018-04-26Add tst-sigaction.c to test BZ #23069Aurelien Jarno2-1/+57
This simple test uses sigaction to define a signal handler. It then uses sigaction again to fetch the information about the same signal handler, and check that they are consistent. This is enough to detect mismatches between struct kernel_sigaction and the kernel version of struct sigaction, like in BZ #23069. Changelog: * signal/tst-sigaction.c: New file to test BZ #23069. * signal/Makefile (tests): Fix indentation. Add tst-sigaction.
2018-04-04hurd: fix buildSamuel Thibault2-0/+2
* signal/sigaddset.c: Include <sigsetopts.h>. * signal/sigdelset.c: Likewise.
2018-04-03Filter out NPTL internal signals (BZ #22391)Adhemerval Zanella5-38/+76
This patch filters out the internal NPTL signals (SIGCANCEL/SIGTIMER and SIGSETXID) from signal functions. GLIBC on Linux requires both signals to proper implement pthread cancellation, posix timers, and set*id posix thread synchronization. And not filtering out the internal signal is troublesome: - A conformant program on a architecture that does not filter out the signals might inadvertently disable pthread asynchronous cancellation, set*id synchronization or posix timers. - It might also to security issues if SIGSETXID is masked and set*id functions are called (some threads might have effective user or group id different from the rest). The changes are basically: - Change __is_internal_signal to bool and used on all signal function that has a signal number as input. Also for signal function which accepts signals sets (sigset_t) it assumes that canonical function were used to add/remove signals which lead to some input simplification. - Fix tst-sigset.c to avoid check for SIGCANCEL/SIGTIMER and SIGSETXID. It is rewritten to check each signal indidually and to check realtime signals using canonical macros. - Add generic __clear_internal_signals and __is_internal_signal version since both symbols are used on generic implementations. - Remove superflous sysdeps/nptl/sigfillset.c. - Remove superflous SIGTIMER handling on Linux __is_internal_signal since it is the same of SIGCANCEL. - Remove dangling define and obvious comment on nptl/sigaction.c. Checked on x86_64-linux-gnu. [BZ #22391] * nptl/sigaction.c (__sigaction): Use __is_internal_signal to check for internal nptl signals. * nptl/sigaction.c (__sigaction): Likewise. * signal/sigaddset.c (sigaddset): Likewise. * signal/sigdelset.c (sigdelset): Likewise. * sysdeps/posix/signal.c (__bsd_signal): Likewise. * sysdeps/posix/sigset.c (sigset): Call and check sigaddset return value. * signal/sigfillset.c (sigfillset): User __clear_internal_signals to filter out internal nptl signals. * signal/tst-sigset.c (do_test): Check ech signal indidually and also check realtime signals using standard macros. * sysdeps/generic/internal-signals.h (__clear_internal_signals, __is_internal_signal, __libc_signal_block_all, __libc_signal_block_app, __libc_signal_restore_set): New functions. * sysdeps/nptl/sigfillset.c: Remove file. * sysdeps/unix/sysv/linux/internal-signals.h (__is_internal_signal): Change return to bool. (__clear_internal_signals): Remove SIGTIMER clean since it is equal to SIGCANEL on Linux. * sysdeps/unix/sysv/linux/sigtimedwait.c (__sigtimedwait): Assume signal set was constructed using standard functions. Reported-by: Yury Norov <ynorov@caviumnetworks.com>
2018-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers43-43/+43
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
2017-12-11Replace = with += in CFLAGS-xxx.c/CPPFLAGS-xxx.cH.J. Lu1-6/+6
Replace = with += in CFLAGS-xxx.c and CPPFLAGS-xxx.c to allow Makefile under sysdeps to define CFLAGS-xx.c and CPPFLAGS-xxx.c. * argp/Makefile (CFLAGS-argp-help.c): Replace = with +=. (CFLAGS-argp-parse.c): Likewise. (CFLAGS-argp-fmtstream.c): Likewise. * crypt/Makefile (CPPFLAGS-sha256-crypt.c): Likewise. (CPPFLAGS-sha512-crypt.c): Likewise. (CPPFLAGS-md5-crypt.c): Likewise. * debug/Makefile (CFLAGS-stack_chk_fail.c): Likewise. (CFLAGS-stack_chk_fail_local.c): Likewise. (CFLAGS-backtrace.c): Likewise. (CFLAGS-sprintf_chk.c): Likewise. (CFLAGS-snprintf_chk.c): Likewise. (CFLAGS-vsprintf_chk.c): Likewise. (CFLAGS-vsnprintf_chk.c): Likewise. (CFLAGS-asprintf_chk.c): Likewise. (CFLAGS-vasprintf_chk.c): Likewise. (CFLAGS-obprintf_chk.c): Likewise. (CFLAGS-dprintf_chk.c): Likewise. (CFLAGS-vdprintf_chk.c): Likewise. (CFLAGS-printf_chk.c): Likewise. (CFLAGS-fprintf_chk.c): Likewise. (CFLAGS-vprintf_chk.c): Likewise. (CFLAGS-vfprintf_chk.c): Likewise. (CFLAGS-gets_chk.c): Likewise. (CFLAGS-fgets_chk.c): Likewise. (CFLAGS-fgets_u_chk.c): Likewise. (CFLAGS-fread_chk.c): Likewise. (CFLAGS-fread_u_chk.c): Likewise. (CFLAGS-swprintf_chk.c): Likewise. (CFLAGS-vswprintf_chk.c): Likewise. (CFLAGS-wprintf_chk.c): Likewise. (CFLAGS-fwprintf_chk.c): Likewise. (CFLAGS-vwprintf_chk.c): Likewise. (CFLAGS-vfwprintf_chk.c): Likewise. (CFLAGS-fgetws_chk.c): Likewise. (CFLAGS-fgetws_u_chk.c): Likewise. (CFLAGS-read_chk.c): Likewise. (CFLAGS-pread_chk.c): Likewise. (CFLAGS-pread64_chk.c): Likewise. (CFLAGS-recv_chk.c): Likewise. (CFLAGS-recvfrom_chk.c): Likewise. (CFLAGS-tst-longjmp_chk.c): Likewise. (CPPFLAGS-tst-longjmp_chk.c): Likewise. (CFLAGS-tst-longjmp_chk2.c): Likewise. (CPPFLAGS-tst-longjmp_chk2.c): Likewise. (CFLAGS-tst-longjmp_chk3.c): Likewise. (CPPFLAGS-tst-longjmp_chk3.c): Likewise. (CFLAGS-tst-chk1.c): Likewise. (CFLAGS-tst-chk2.c): Likewise. (CFLAGS-tst-chk3.c): Likewise. (CFLAGS-tst-chk4.cc): Likewise. (CFLAGS-tst-chk5.cc): Likewise. (CFLAGS-tst-chk6.cc): Likewise. (CFLAGS-tst-lfschk1.c): Likewise. (CFLAGS-tst-lfschk2.c): Likewise. (CFLAGS-tst-lfschk3.c): Likewise. (CFLAGS-tst-lfschk4.cc): Likewise. (CFLAGS-tst-lfschk5.cc): Likewise. (CFLAGS-tst-lfschk6.cc): Likewise. (CFLAGS-tst-ssp-1.c): Likewise. * dirent/Makefile (CFLAGS-scandir.c): Likewise. (CFLAGS-scandir64.c): Likewise. (CFLAGS-scandir-tail.c): Likewise. (CFLAGS-scandir64-tail.c): Likewise. * elf/Makefile (CPPFLAGS-dl-tunables.c): Likewise. (CFLAGS-dl-tunables.c): Likewise. (CFLAGS-dl-runtime.c): Likewise. (CFLAGS-dl-lookup.c): Likewise. (CFLAGS-dl-iterate-phdr.c): Likewise. (CFLAGS-vismain.c): Likewise. (CFLAGS-tst-linkall-static.c): Likewise. (CFLAGS-tst-linkall-static.c): Likewise. (CPPFLAGS-dl-load.c): Likewise. (CFLAGS-ldconfig.c): Likewise. (CFLAGS-dl-cache.c): Likewise. (CFLAGS-cache.c): Likewise. (CFLAGS-rtld.c): Likewise. (CFLAGS-multiload.c): Likewise. (CFLAGS-filtmod1.c): Likewise. (CFLAGS-tst-align.c): Likewise. (CFLAGS-tst-align2.c): Likewise. (CFLAGS-tst-alignmod.c): Likewise. (CFLAGS-tst-alignmod2.c): Likewise. (CPPFLAGS-tst-execstack.c): Likewise. (CFLAGS-tst-ptrguard1-static.c): Likewise. (CFLAGS-tst-latepthreadmod.c): Likewise. * grp/Makefile (CFLAGS-getgrgid_r.c): Likewise. (CFLAGS-getgrnam_r.c): Likewise. (CFLAGS-getgrent_r.c): Likewise. (CFLAGS-getgrent.c): Likewise. (CFLAGS-fgetgrent.c): Likewise. (CFLAGS-fgetgrent_r.c): Likewise. (CFLAGS-putgrent.c): Likewise. (CFLAGS-initgroups.c): Likewise. (CFLAGS-getgrgid.c): Likewise. * gshadow/Makefile (CFLAGS-getsgent_r.c): Likewise. (CFLAGS-getsgent.c): Likewise. (CFLAGS-fgetsgent.c): Likewise. (CFLAGS-fgetsgent_r.c): Likewise. (CFLAGS-putsgent.c): Likewise. (CFLAGS-getsgnam.c): Likewise. (CFLAGS-getsgnam_r.c): Likewise. * iconv/Makefile (CFLAGS-iconv_prog.c): Likewise. (CFLAGS-iconv_charmap.c): Likewise. (CFLAGS-dummy-repertoire.c): Likewise. (CFLAGS-charmap.c): Likewise. (CFLAGS-linereader.c): Likewise. (CFLAGS-simple-hash.c): Likewise. (CFLAGS-gconv_conf.c): Likewise. (CFLAGS-iconvconfig.c): Likewise. * inet/Makefile (CFLAGS-gethstbyad_r.c): Likewise. (CFLAGS-gethstbyad.c): Likewise. (CFLAGS-gethstbynm_r.c): Likewise. (CFLAGS-gethstbynm.c): Likewise. (CFLAGS-gethstbynm2_r.c): Likewise. (CFLAGS-gethstbynm2.c): Likewise. (CFLAGS-gethstent_r.c): Likewise. (CFLAGS-gethstent.c): Likewise. (CFLAGS-rcmd.c): Likewise. (CFLAGS