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2017-08-15gmon: Add test for basic mcount/gprof functionalityFlorian Weimer
2017-08-04Check linker support for INSERT in linker scriptH.J. Lu
Since gold doesn't support INSERT in linker script: https://sourceware.org/bugzilla/show_bug.cgi?id=21676 tst-split-dynreloc fails to link with gold. Check if linker supports INSERT in linker script before using it. * config.make.in (have-insert): New. * configure.ac (libc_cv_insert): New. Set to yes if linker supports INSERT in linker script. (AC_SUBST(libc_cv_insert): New. * configure: Regenerated. * sysdeps/x86_64/Makefile (tests): Add tst-split-dynreloc only if $(have-insert) == yes.
2017-07-06Add per-thread cache to mallocDJ Delorie
* config.make.in: Enable experimental malloc option. * configure.ac: Likewise. * configure: Regenerate. * manual/install.texi: Document it. * INSTALL: Regenerate. * malloc/Makefile: Likewise. * malloc/malloc.c: Add per-thread cache (tcache). (tcache_put): New. (tcache_get): New. (tcache_thread_freeres): New. (tcache_init): New. (__libc_malloc): Use cached chunks if available. (__libc_free): Initialize tcache if needed. (__libc_realloc): Likewise. (__libc_calloc): Likewise. (_int_malloc): Prefill tcache when appropriate. (_int_free): Likewise. (do_set_tcache_max): New. (do_set_tcache_count): New. (do_set_tcache_unsorted_limit): New. * manual/probes.texi: Document new probes. * malloc/arena.c: Add new tcache tunables. * elf/dl-tunables.list: Likewise. * manual/tunables.texi: Document them. * NEWS: Mention the per-thread cache.
2017-06-28Require binutils 2.25 or later to build glibc.Joseph Myers
This patch implements a requirement of binutils >= 2.25 (up from 2.22) to build glibc. Tests for 2.24 or later on x86_64 and s390 are removed. It was already the case, as indicated by buildbot results, that 2.24 was too old for building tests for 32-bit x86 (produced internal linker errors linking elf/tst-gnu2-tls1mod.so). I don't know if any configure tests for binutils features are obsolete given the increased version requirement. Tested for x86_64. * configure.ac (AS): Require binutils 2.25 or later. (LD): Likewise. * configure: Regenerated. * sysdeps/s390/configure.ac (AS): Remove version check. * sysdeps/s390/configure: Regenerated. * sysdeps/x86_64/configure.ac (AS): Remove version check. * sysdeps/x86_64/configure: Regenerated. * manual/install.texi (Tools for Compilation): Document requirement for binutils 2.25 or later. * INSTALL: Regenerated.
2017-06-28Support building glibc with gold 1.14 or above [BZ #14995]H.J. Lu
This patch changes configure.ac to allow gold 1.14 or above to be used to configire glibc so that gold glibc bugs can be fixed. Tested with CC="gcc -fuse-ld=gold" CXX="g++ -fuse-ld=gold" on Fedora 25 with gold 1.14 (20170623). Gold 1.14 was first released in binutils 2.28. On x86-64, for "make check", I got Error in `/export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1': double free or corruption (fasttop): 0x00000000008755f0 *** ======= Backtrace: ========= /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(+0x772fb)[0x7f85225b52fb] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(+0x7d6c6)[0x7f85225bb6c6] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(+0x7df0e)[0x7f85225bbf0e] /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so.2(+0x182d)[0x7f85226e682d] /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so.2(dlclose+0x1f)[0x7f85226e623f] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload2.so(+0x933)[0x7f8522539933] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so(+0xfd1a)[0x7f85226fbd1a] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(+0x3c5e0)[0x7f852257a5e0] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(+0x3c63a)[0x7f852257a63a] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload2.so(+0x9aa)[0x7f85225399aa] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so(+0xf74a)[0x7f85226fb74a] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so(+0xf85b)[0x7f85226fb85b] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so(+0x13e98)[0x7f85226ffe98] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(_dl_catch_error+0x71)[0x7f85226643c1] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so(+0x13639)[0x7f85226ff639] /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so.2(+0x1156)[0x7f85226e6156] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(_dl_catch_error+0x71)[0x7f85226643c1] /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so.2(+0x1789)[0x7f85226e6789] /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so.2(dlopen+0x32)[0x7f85226e61e2] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1[0x4009ca] /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so.6(__libc_start_main+0xf1)[0x7f8522565231] /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1[0x400a5a] ======= Memory map: ======== 00400000-00401000 r-xp 00000000 08:11 26334965 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1 00401000-00402000 r--p 00000000 08:11 26334965 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1 00402000-00403000 rw-p 00001000 08:11 26334965 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload1 00875000-00896000 rw-p 00000000 00:00 0 [heap] 7f851c000000-7f851c021000 rw-p 00000000 00:00 0 7f851c021000-7f8520000000 ---p 00000000 00:00 0 7f85222f3000-7f8522309000 r-xp 00000000 08:02 136658 /usr/lib64/libgcc_s-6.3.1-20170216.so.1 7f8522309000-7f8522508000 ---p 00016000 08:02 136658 /usr/lib64/libgcc_s-6.3.1-20170216.so.1 7f8522508000-7f8522509000 r--p 00015000 08:02 136658 /usr/lib64/libgcc_s-6.3.1-20170216.so.1 7f8522509000-7f852250a000 rw-p 00016000 08:02 136658 /usr/lib64/libgcc_s-6.3.1-20170216.so.1 7f8522539000-7f852253a000 r-xp 00000000 08:11 26334619 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload2.so 7f852253a000-7f852253b000 r--p 00000000 08:11 26334619 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload2.so 7f852253b000-7f852253c000 rw-p 00001000 08:11 26334619 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/constload2.so 7f852253c000-7f852253e000 rw-p 00000000 00:00 0 7f852253e000-7f85226da000 r-xp 00000000 08:11 26309973 /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so 7f85226da000-7f85226db000 ---p 0019c000 08:11 26309973 /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so 7f85226db000-7f85226de000 r--p 0019c000 08:11 26309973 /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so 7f85226de000-7f85226e1000 rw-p 0019f000 08:11 26309973 /export/build/gnu/glibc-gold/build-x86_64-linux/libc.so 7f85226e1000-7f85226e5000 rw-p 00000000 00:00 0 7f85226e5000-7f85226e8000 r-xp 00000000 08:11 26313777 /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so 7f85226e8000-7f85226e9000 r--p 00002000 08:11 26313777 /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so 7f85226e9000-7f85226ea000 rw-p 00003000 08:11 26313777 /export/build/gnu/glibc-gold/build-x86_64-linux/dlfcn/libdl.so 7f85226ea000-7f85226ec000 rw-p 00000000 00:00 0 7f85226ec000-7f8522711000 r-xp 00000000 08:11 26309972 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so 7f8522711000-7f8522712000 rw-p 00000000 00:00 0 7f8522712000-7f8522713000 r--p 00025000 08:11 26309972 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so 7f8522713000-7f8522714000 rw-p 00026000 08:11 26309972 /export/build/gnu/glibc-gold/build-x86_64-linux/elf/ld.so 7f8522714000-7f8522715000 rw-p 00000000 00:00 0 7ffc5a2bd000-7ffc5a2df000 rw-p 00000000 00:00 0 [stack] 7ffc5a32c000-7ffc5a32e000 r--p 00000000 00:00 0 [vvar] 7ffc5a32e000-7ffc5a330000 r-xp 00000000 00:00 0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall] and make[4]: *** [/export/build/gnu/glibc-gold/build-x86_64-linux/elf/vismain] Error 1 This is because gold doesn't support protected data symbols: configure:5672: checking linker support for protected data symbol configure:5682: gcc -fuse-ld=gold -nostdlib -nostartfiles -fno-stack-protector -fPIC -shared conftest.c -o conftest.so configure:5685: $? = 0 configure:5692: gcc -fuse-ld=gold -nostdlib -nostartfiles -fno-stack-protector conftest.c -o conftest conftest.so /usr/local/bin/ld.gold: error: /tmp/ccXWoofs.o: cannot make copy relocation for protected symbol 'bar', defined in conftest.so collect2: error: ld returned 1 exit status make[4]: *** [/export/build/gnu/glibc-gold/build-x86_64-linux/elf/tst-split-dynreloc] Error 1 This is because gold doesn't support INSERT in linker script: https://sourceware.org/bugzilla/show_bug.cgi?id=21676 The total failures are FAIL: dlfcn/bug-dl-leaf FAIL: elf/constload1 FAIL: elf/global FAIL: elf/ifuncmain1 FAIL: elf/ifuncmain1pic FAIL: elf/ifuncmain1pie FAIL: elf/ifuncmain1vis FAIL: elf/ifuncmain1vispic FAIL: elf/ifuncmain1vispie FAIL: elf/ifuncmain3 FAIL: elf/initfirst FAIL: elf/preloadtest FAIL: elf/tst-audit11 FAIL: elf/tst-audit12 FAIL: elf/tst-audit4 FAIL: elf/tst-audit5 FAIL: elf/tst-audit6 FAIL: elf/tst-audit7 FAIL: elf/tst-dlmodcount FAIL: elf/tst-dlmopen1 FAIL: elf/tst-dlmopen3 FAIL: elf/tst-dlopenrpath FAIL: elf/tst-latepthread FAIL: elf/tst-leaks1-mem FAIL: elf/tst-nodelete-dlclose FAIL: elf/unload6 FAIL: nss/test-netdb FAIL: nss/tst-nss-test1 FAIL: posix/tst-getaddrinfo5 [BZ #14995] * configure.ac: Allow gold 1.14 or above to configire glibc * configure: Regenerated.
2017-06-19Require GCC 4.9 or later for building glibc.Joseph Myers
This patch makes configure require GCC 4.9 or later for building glibc, and documents that requirement. Requiring GCC 4.9 or later allows use of _Generic (as in tzcode). It would allow <stdatomic.h> and _Atomic to be used as well if desired, although we need to avoid any libatomic dependencies on any platforms. This patch is explicitly the minimum to implement a new version requirement, with any consequent cleanups of conditional code (not in installed headers or files shared with gnulib etc.) to be done separately. Tested for x86_64. * configure.ac (libc_cv_compiler_ok): Require GCC 4.9 or later. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Document requirement for GCC 4.9 or later. * INSTALL: Regenerated.
2017-06-15Enable tunables by defaultSiddhesh Poyarekar
All of the major architectures are adopting tunables as a way to add tuning to the library, from hwcap_mask for aarch64 to HLE for s390 and ifunc and cache geometry for x86. Given this adoption and the fact that we don't want additional tuning knobs to be added outside of tunables, it makes sense to enable tunables by default using this trivial patch. Smoke tested on x86 to ensure that tunables code was built without specifying it as a configure flag. I have kept it as --enabled and not changed it to --disable since we want to still keep the option of different kinds of front-ends for tunables. * configure.ac(--enable-tunables): Enable by default. * configure: Regenerate. * NEWS: Mention change. * manual/install.texi (enable-tunables): Adjust documentation. * INSTALL: Regenerate.
2017-06-13configure: Suppress expected compiler error messageFlorian Weimer
2017-06-13Make copy of <bits/std_abs.h> from GCC 7 [BZ #21573]H.J. Lu
<bits/std_abs.h> from GCC 7 will include /usr/include/stdlib.h from "#include_next" (instead of stdlib/stdlib.h in the glibc source directory), and this turns up as a make dependency. Also make a copy of <bits/std_abs.h> to prevent it from including /usr/include/stdlib.h. [BZ #21573] * Makerules [$(c++-bits-std_abs-h) != ""] (before-compile): Add $(common-objpfx)bits/std_abs.h. [$(c++-bits-std_abs-h) != ""] ($(common-objpfx)bits/std_abs.h): New target. * config.make.in (c++-bits-std_abs-h): New. * configure.ac (find_cxx_header): Use "\,$1," with sed. (CXX_BITS_STD_ABS_H): New. (AC_SUBST(CXX_BITS_STD_ABS_H)): Likewise. * configure: Regenerated.
2017-03-21Deprecate libnsl by default (only shared library will beThorsten Kukuk
build for backward compatibility, no linking possible) and disable building of libnss_compat, libnss_nis and libnss_nisplus, except --enable-obsolete-nsl option is given to configure. * config.h.in: Add LINK_OBSOLETE_NSL. * config.make.in: Add build-obsolete-nsl. * configure.ac: Add obsolete-nsl option. * include/libc-symbols.h: Define libnsl_hidden_nolink_def. * include/rpcsvc/yp.h: Add missing functions as libnsl_hidden_proto. * include/rpcsvc/nislib.h: Likewise. * include/rpcsvc/ypclnt.h: Likewise. * manual/install.texi: Document --enable-obsolete-nsl. * nis/Makefile: Build only libnsl by default (add build-obsolete-nsl). * nis/nis_add.c: Replace libnsl_hidden_def with libnsl_hidden_nolink_def. * nis/nis_addmember.c: Likewise. * nis/nis_call.c: Likewise. * nis/nis_clone_obj.c: Likewise. * nis/nis_defaults.c: Likeise. * nis/nis_domain_of_r.c: Likewise. * nis/nis_error.c: Likewise. * nis/nis_file.c: Likewise. * nis/nis_free.c: Likewise. * nis_local_names.c: Likewise. * nis/nis_lookup.c: Likewise. * nis/nis_modify.c: Likewise. * nis/nis_print.c: Likewise. * nis/nis_remove.c: Likewise. * nis/nis_table.c: Likewise. * nis/nis_util.c: Likewise. * nis/nis_xdr.c: Likewise. * nis/yp_xdr.c: Likewise. * nis/ypclnt.c: Likewise. * nis/ypupdate_xdr.c: Likewise. * nis/nis_checkpoint.c: Add libnsl_hidden_nolink_def to all functions. * nis/nis_clone_dir.c: Likewise. * nis/nis_clone_res.c: Likewise. * nis/nis_creategroup.c: Likewise. * nis/nis_destroygroup.c: Likewise. * nis/nis_domain_of.c: Likewise. * nis/nis_getservlist.c: Likewise. * nis/nis_ismember.c: Likewise. * nis/nis_mkdir.c: Likewise. * nis/nis_ping.c: Likewise. * nis/nis_print_group_entry.c: Likewise. * nis/nis_removemember.c: Likewise. * nis/nis_rmdir.c: Likewise. * nis/nis_server.c: Likewise. * nis/nis_subr.c: Likewise. * nis/nis_verifygroup.c: Likewise. Signed-off-by: Thorsten Kukuk <kukuk@suse.com>
2017-03-15Fix combreloc test with BSD grepAlexey Neyman
The test for "-z combreloc" fails when cross-compiling on a machine that uses BSD grep (e.g. on macos). grep complains about empty subexpression and exits with non-zero status, which is interpreted by configure as "not found". As a result, support for "-z combreloc" (HAVE_Z_COMBRELOC) is not detected, leading to link failure on SPARC. While there, replace fgrep with 'grep -F', as fgrep is non-POSIX. * configure.ac: Avoid empty subexpression in grep. Signed-off-by: Alexey Neyman <stilor@att.net>
2016-12-31Enhance --enable-tunables to select tunables frontend at build timeSiddhesh Poyarekar
At the GNU Tools Cauldron 2016, the state of the current tunables patchset was considered OK with the addition of a way to select the frontend to be used for the tunables. That is, to avoid being locked in to one type of frontend initially, it should be possible to build tunables with a different frontend with something as simple as a configure switch. To that effect, this patch enhances the --enable-tunables option to accept more values than just 'yes' or 'no'. The current frontend (and default when enable-tunables is 'yes') is called 'valstring', to select the frontend where a single environment variable is set to a colon-separated value string. More such frontends can be added in future. * Makeconfig (have-tunables): Check for non-negative instead of positive. * configure.ac: Add 'valstring' as a valid value for --enable-tunables. * configure: Regenerate. * elf/Makefile (have-tunables): Check for non-negative instead of positive. (CPPFLAGS-dl-tunables.c): Define TUNABLES_FRONTEND for dl-tunables.c. * elf/dl-tunables.c (GLIBC_TUNABLES): Define only when TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. (tunables_strdup): Likewise. (disable_tunables): Likewise. (parse_tunables): Likewise. (__tunables_init): Process GLIBC_TUNABLES envvar only when. TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. * elf/dl-tunables.h (TUNABLES_FRONTEND_valstring): New macro. (TUNABLES_FRONTEND_yes): New macro, define as TUNABLES_FRONTEND_valstring by default. * manual/install.texi: Document new acceptable values for --enable-tunables. * INSTALL: Regenerate.
2016-12-31Add framework for tunablesSiddhesh Poyarekar
The tunables framework allows us to uniformly manage and expose global variables inside glibc as switches to users. tunables/README has instructions for glibc developers to add new tunables. Tunables support can be enabled by passing the --enable-tunables configure flag to the configure script. This patch only adds a framework and does not pose any limitations on how tunable values are read from the user. It also adds environment variables used in malloc behaviour tweaking to the tunables framework as a PoC of the compatibility interface. * manual/install.texi: Add --enable-tunables option. * INSTALL: Regenerate. * README.tunables: New file. * Makeconfig (CPPFLAGS): Define TOP_NAMESPACE. (before-compile): Generate dl-tunable-list.h early. * config.h.in: Add HAVE_TUNABLES. * config.make.in: Add have-tunables. * configure.ac: Add --enable-tunables option. * configure: Regenerate. * csu/init-first.c (__libc_init_first): Move __libc_init_secure earlier... * csu/init-first.c (LIBC_START_MAIN):... to here. Include dl-tunables.h, libc-internal.h. (LIBC_START_MAIN) [!SHARED]: Initialize tunables for static binaries. * elf/Makefile (dl-routines): Add dl-tunables. * elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE namespace. * elf/dl-support (_dl_nondynamic_init): Unset MALLOC_CHECK_ only when !HAVE_TUNABLES. * elf/rtld.c (process_envvars): Likewise. * elf/dl-sysdep.c [HAVE_TUNABLES]: Include dl-tunables.h (_dl_sysdep_start): Call __tunables_init. * elf/dl-tunable-types.h: New file. * elf/dl-tunables.c: New file. * elf/dl-tunables.h: New file. * elf/dl-tunables.list: New file. * malloc/tst-malloc-usable-static.c: New test case. * malloc/Makefile (tests-static): Add it. * malloc/arena.c [HAVE_TUNABLES]: Include dl-tunables.h. Define TUNABLE_NAMESPACE. (DL_TUNABLE_CALLBACK (set_mallopt_check)): New function. (DL_TUNABLE_CALLBACK_FNDECL): New macro. Use it to define callback functions. (ptmalloc_init): Set tunable values. * scripts/gen-tunables.awk: New file. * sysdeps/mach/hurd/dl-sysdep.c: Include dl-tunables.h. (_dl_sysdep_start): Call __tunables_init.
2016-12-26Work even with compilers which enable -fstack-protector by default [BZ #7065]Nick Alcock
With all the machinery we just added, we can easily arrange to work even when the compiler passes in -fstack-protector automatically: all the necessary bits of glibc are always compiled with -fno-stack-protector now. So tear out the check in configure, and add appropriate calls to -fno-stack-protector in tests that need them (largely those that use -nostdlib), since we don't yet have a __stack_chk_fail that those tests can rely upon. (GCC often provides one, but we cannot rely on this, especially not when bootstrapping.) When stack protection is disabled, explicitly pass -fno-stack-protector to everything, to stop a compiler hacked to enable it from inserting calls to __stack_chk_fail via the PLT in every object file.
2016-12-26Do not stack-protect ifunc resolvers [BZ #7065]Nick Alcock
When dynamically linking, ifunc resolvers are called before TLS is initialized, so they cannot be safely stack-protected. We avoid disabling stack-protection on large numbers of files by using __attribute__ ((__optimize__ ("-fno-stack-protector"))) to turn it off just for the resolvers themselves. (We provide the attribute even when statically linking, because we will later use it elsewhere too.)
2016-12-26Configure support for --enable-stack-protector [BZ #7065]Nick Alcock
This adds =all and =strong, with obvious semantics, defaulting to off. We don't validate the value of the option yet: that's in a later patch. Nor do we use it for anything at this stage. We differentiate between 'the compiler understands -fstack-protector' and 'the user wanted -fstack-protector' so that we can pass -fno-stack-protector in appropriate places even if the user didn't want to turn on -fstack-protector for other parts. (This helps us overcome another existing limitation, that glibc doesn't work with GCCs hacked to pass in -fstack-protector by default.) We also arrange to set the STACK_PROTECTOR_LEVEL #define to a value appropriate for the stack-protection level in use for each file in particular.
2016-12-22Add configure check for python programSiddhesh Poyarekar
Add a configure check that looks for python3 and python in that order since we had agreed in the past to prefer python3 over python in all our code. The patch also adjusts invocations through the various Makefiles to use the set variable. * configure.ac: Check for python3 or python. * configure: Regenerated. * config.make.in (PYTHON): New variable. * benchtests/Makefile: Don't define PYTHON. (bench): Define target only if PYTHON was defined. * Rules: Don't define PYTHON. Define pretty printer targets only if PYTHON was defined. (tests-printers): Add to tests-unsupported if PYTHON is not found. (python-flags, python-invoke): Remove. (tests-printers-out): Use PYTHON instead of python-invoke.
2016-12-02Bug 20918 - Building with --enable-nss-crypt fails tst-linkall-staticCarlos O'Donell
Some configurations may use NSS cryptographic routines but have no static library for those routines. The following changes allow glibc to be built and tested with --enable-nss-crypt, but without having a static NSS library. At a high level the change does two things: (1) Detect at configure time if static NSS crypto libraries are available. Assumes libfreebl3.a (instead of the existing Fedora libfreebl.a which is incomplete) which matches libfreebl3.so. (2) If static NSS crypto libraries are _not_ available then adjust the way in which we build tst-linkall-static. This includes excluding a reference to crypt and not linking against libcrypt.a, all of which will fail otherwise. Testing assumptions: * Static library is named libfreebl3.a (not libfreebl.a as is currently provided in Fedora), matching libfreebl3.so shared link name. Tested on x86_64 on Fedora with: (a) --enable-nss-crypt, with no static NSS library support: PASS (previous FAIL) (b) --enable-nss-crypt, with faked static NSS library support: PASS (unsupported) * Requires changing elf/Makefile to include a stub /lib64/libfreebl3.a for testing purposes. (c) --disable-nss-crypt: PASS (default) No regressions on x86_64. For details see: https://www.sourceware.org/ml/libc-alpha/2016-11/msg00647.html
2016-11-15configure: accept __stack_chk_fail_local for ssp support too [BZ #20662]Denis Kaganovich
When glibc is compiled with gcc 6.2 that has been configured with --enable-default-pie and --enable-default-ssp, the configure script fails to detect that the compiler has ssp turned on by default when being built for i686-linux-gnu. This is because gcc is emitting __stack_chk_fail_local but the script is only looking for __stack_chk_fail. Support both. Example output: checking whether x86_64-pc-linux-gnu-gcc -m32 -Wl,-O1 -Wl,--as-needed implicitly enables -fstack-protector... no
2016-10-07Add configure check to test if gcc supports attribute ifunc.Stefan Liebler
This patch adds a configure check to test if gcc supports attribute ifunc. The support can either be enabled in <gcc-src>/gcc/config.gcc for one architecture in general by setting default_gnu_indirect_function variable to yes or by configuring gcc with --enable-gnu-indirect-function. The next patch rewrites libc_ifunc macro to use gcc attribute ifunc instead of inline assembly to generate the IFUNC symbols due to false debuginfo. If gcc does not support attribute ifunc, the old approach for generating ifunc'ed symbols is used. Then the debug-information is false. Thus it is recommended to use a gcc with indirect function support (See notes in INSTALL). After this patch-series these inline assemblies for ifunc-handling are not scattered in multiple files but are used only indirect via ifunc-macros and can simply removed in libc-symbols.h in future. If glibc is configured with --enable-multi-arch and gcc does not support attribute ifunc, a configure warning is dumped! ChangeLog: * config.h.in (HAVE_GCC_IFUNC): New undef. * configure.ac: Add check if gcc supports attribute ifunc feature. * configure: Regenerated. * manual/install.texi: Add recommendation for gcc with indirect-function support. * INSTALL: Regenerated.
2016-09-21Avoid running $(CXX) during build to obtain header file pathsFlorian Weimer
This reduces the build time somewhat and is particularly noticeable during rebuilds with few code changes.
2016-07-12x86-64: Properly align stack in _dl_tlsdesc_dynamic [BZ #20309]H.J. Lu
Since _dl_tlsdesc_dynamic is called via PLT, we need to add 8 bytes for push in the PLT entry to align the stack. [BZ #20309] * configure.ac (have-mtls-dialect-gnu2): Set to yes if -mtls-dialect=gnu2 works. * configure: Regenerated. * elf/Makefile [have-mtls-dialect-gnu2 = yes] (tests): Add tst-gnu2-tls1. (modules-names): Add tst-gnu2-tls1mod. ($(objpfx)tst-gnu2-tls1): New. (tst-gnu2-tls1mod.so-no-z-defs): Likewise. (CFLAGS-tst-gnu2-tls1mod.c): Likewise. * elf/tst-gnu2-tls1.c: New file. * elf/tst-gnu2-tls1mod.c: Likewise. * sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Add 8 bytes for push in the PLT entry to align the stack.
2016-05-24Avoid an extra branch to PLT for -z nowH.J. Lu
When --enable-bind-now is used to configure glibc build, we can avoid an extra branch to the PLT entry by using indirect branch via the GOT slot instead, which is similar to the first instructuon in the PLT entry. Changes in the shared library sizes in text sections: Shared library Before (bytes) After (bytes) libm.so 1060813 1060797 libmvec.so 160881 160805 libpthread.so 94992 94984 librt.so 25064 25048 * config.h.in (BIND_NOW): New. * configure.ac (BIND_NOW): New. Defined for --enable-bind-now. * configure: Regenerated. * sysdeps/x86_64/sysdep.h (JUMPTARGET)[BIND_NOW]: Defined to indirect branch via the GOT slot.
2016-02-18Regenerated configure scripts.Adhemerval Zanella
2016-01-17configure: make the unsupported error message less hostileMike Frysinger
2015-12-02Use shell's builtin pwd.Ludovic Courtès
Insisting on /bin/pwd is unnecessary nowadays. Autoconf-generated scripts have been using the shell's built-in "pwd" for a long time.`
2015-11-27Rename localedir to complocaledir (bug 14259).Carlos O'Donell
In preparation to fix the --localedir configure argument we must move the existing conflicting definition of localedir to a more appropriate name. Given that all current internal uses of localedir relate to the compiled locales we rename to complocaledir.
2015-11-14Run tst-prelink test for GLOB_DAT relocH.J. Lu
Run tst-prelink test on targets with GLOB_DAT relocaton. * config.make.in (have-glob-dat-reloc): New. * configure.ac (libc_cv_has_glob_dat): New. Set to yes if target supports GLOB_DAT relocaton. AC_SUBST. * configure: Regenerated. * elf/Makefile (tests): Add tst-prelink. (tests-special): Add $(objpfx)tst-prelink-cmp.out. (tst-prelink-ENV): New. ($(objpfx)tst-prelink-conflict.out): Likewise. ($(objpfx)tst-prelink-cmp.out): Likewise. * sysdeps/x86/tst-prelink.c: Moved to ... * elf/tst-prelink.c: Here. * sysdeps/x86/tst-prelink.exp: Moved to ... * elf/tst-prelink.exp: Here. * sysdeps/x86/Makefile (tests): Don't add tst-prelink. (tst-prelink-ENV): Removed. ($(objpfx)tst-prelink-conflict.out): Likewise. ($(objpfx)tst-prelink-cmp.out): Likewise. (tests-special): Don't add $(objpfx)tst-prelink-cmp.out.
2015-11-06Remove configure tests for some linker -z options.Joseph Myers
There are configure tests for the linker -z nodelete, -z nodlopen and -z initfirst options. These options were added in binutils 2.11, so the tests are obsolete; this patch removes them. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_z_nodelete): Remove configure test. (libc_cv_z_nodlopen): Likewise. (libc_cv_z_initfirst): Likewise. * configure: Regenerated.
2015-11-03Remove --no-whole-archive configure test.Joseph Myers
There is a configure test for the --no-whole-archive linker option. This option was added in binutils 2.7, so the test is obsolete; this patch removes it. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_ld_no_whole_archive): Remove configure test. * configure: Regenerated.
2015-11-02Remove init_array / fini_array configure test.Joseph Myers
There is a configure test "for .preinit_array/.init_array/.fini_array support". Support for this feature was added in binutils 2.13, so the configure test is obsolete; this patch removes it. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_initfini_array): Remove configure test. * configure: Regenerated.
2015-10-29Remove configure tests for visibility support.Joseph Myers
There are various configure tests for visibility support in the compiler and assember. GCC support for visibility attributes was added in GCC 3.3. I don't know what specific fix was intended by the test "for broken __attribute__((visibility())", but it was added by <https://sourceware.org/ml/libc-hacker/2002-08/msg00030.html>, and GCC 3.3 appears not to have that breakage, so I suspect it was only ever in development versions before 3.3 was released. The assembler support was added in binutils 2.10. This patch removes the tests in question as obsolete. Two tests that were formerly conditional on "if test $libc_cv_visibility_attribute = yes", including the one for linker support for protected data, are now unconditional. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_protected_directive): Remove configure test. (libc_cv_visibility_attribute): Likewise. (libc_cv_protected_data): Test unconditionally. (libc_cv_broken_visibility_attribute): Remove configure test. (libc_cv_have_sdata_section): Test unconditionally. * configure: Regenerated.
2015-10-27Use -std=gnu11 instead of -std=gnu99.Joseph Myers
Now that GCC 4.7 or later is required to build glibc, this patch moves the build from using -std=gnu99 to -std=gnu11 (option added in 4.7). This allows use of C11 features from GCC's headers, such as new float.h macros and max_align_t. Tested for x86_64 and x86 (testsuite; installed stripped shared libraries are unchanged by the patch on x86_64, while I see some slight code reordering of no significance on x86). * Makeconfig (CFLAGS): Use -std=gnu11 instead of -std=gnu99. * Makefile ($(objpfx)c++-types-check.out): Filter out -std=gnu11 instead of -std=gnu99. * configure.ac (systemtap): Test with -std=gnu11 instead of -std=gnu99. * configure: Regenerated. * math/gen-auto-libm-tests.c: Use -std=gnu11 instead of -std=gnu99 in compilation command in comment.
2015-10-27Remove sysdeps/nptl/configure.ac.Joseph Myers
sysdeps/nptl/configure.ac tests for forced unwind support and the C cleanup attribute, giving errors if either is unsupported. It does nothing beyond running those two tests. Both the attribute, and _Unwind_GetCFA which is used in the forced unwind test, were added in GCC 3.3. Thus these tests are long obsolete, and this patch removes the configure fragment running them, along with associated conditionals. Tested for x86_64 and x86 (testsuite, and that installed stripped shared libraries are unchanged by the patch). * sysdeps/nptl/configure.ac: Remove file. * sysdeps/nptl/configure: Remove generated file. * configure.ac (libc_cv_forced_unwind): Do not substitute. * configure: Regenerated. * config.h.in (HAVE_FORCED_UNWIND): Remove #undef. * config.make.in (have-forced-unwind): Remove variable. * nptl/Makefile [$(have-forced-unwind) = yes]: Make code unconditional. * nptl/descr.h [HAVE_FORCED_UNWIND]: Likewise. * nptl/unwind.c [HAVE_FORCED_UNWIND]: Likewise. (__pthread_unwind) [!HAVE_FORCED_UNWIND]: Remove conditional code. * nptl/version.c [HAVE_FORCED_UNWIND]: Make code unconditional. * sysdeps/nptl/Makefile [$(have-forced-unwind) = yes]: Make code unconditional.
2015-10-27Require GCC 4.7 or later to build glibc.Joseph Myers
This patch implements a requirement of GCC 4.7 or later to build glibc. This was discussed in the thread starting at <https://sourceware.org/ml/libc-alpha/2015-08/msg00851.html>. Concerns were expressed by Mike and David. At <https://sourceware.org/ml/libc-alpha/2015-10/msg00453.html> I have provided a 14-patch series showing in outline the cleanups facilitated by this version requirement, as requested by Mike (this patch is the first in that series, with the addition of a NEWS entry). Given the absence of further concerns or alternative proposals for criteria for updates to this version requirement as requested in <https://sourceware.org/ml/libc-alpha/2015-10/msg00065.html>, I am interpreting this as "absence of sustained opposition" under Carlos's definition at <https://sourceware.org/glibc/wiki/Consensus> and proposing this patch for inclusion in glibc. I'd like to remind people testing with 4.6 that if they move to testing with GCC 5 then it will probably be about four years before they need to update the compiler they use to test glibc again. Although on the principles of time-based updates I think a move to requiring binutils 2.23 would be reasonable, I'm not currently aware of any cleanups that would facilitate so am not proposing that at this time (but would expect to propose a move to requiring binutils 2.24 in a year's time, as that brings features such as AVX512 support that should allow some conditionals to be cleaned up). If someone thinks a move to requiring 2.23 would help clean things up for their architecture, please speak up. (And in general, I suspect there are lots of architecture-specific configure tests that could be removed on the basis of current GCC and binutils version requirements, given how I've found architecture-independent tests obsolete on the basis of version requirements going back 20 years.) Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_compiler_ok): Require GCC 4.7 or later. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Document requirement for GCC 4.7 or later. * INSTALL: Regenerated.
2015-10-27Remove TLS configure tests.Joseph Myers
There seemed to be support in response to <https://sourceware.org/ml/libc-alpha/2015-10/msg00510.html> for removing configure tests that exist only to produce errors, where we expect that tool versions failing the tests would also fail the tests of minimum GCC / binutils versions. This patch removes the tests for TLS support as one instance of such tests. Since the addition of TLS emulation support in GCC 4.3, I don't think these tests would have failed even if proper TLS support (as required by glibc) was missing in that architecture's GCC back end, so any new glibc ports wanting a substantive test (if there are actual GCC or binutils versions for those architectures, with supported version numbers, missing TLS support) would have needed an architecture-specific test anyway. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_gcc___thread): Remove configure test. (libc_cv_gcc_tls_model_attr): Likewise. * configure: Regenerated.
2015-10-27Remove configure test for needing -P for .S files.Joseph Myers
There is a configure test for "whether we need to use -P to assemble .S files". I think this test is long obsolete. I don't have a specific reference to a binutils change or version that obsoleted this test, but: (a) we only support GNU binutils; (b) it looks like every architecture supported by glibc has '#' as a line comment character in its gas port; (c) in any case, if the (compiler, assembler) combination in use cannot compile a .S file without special options, that would clearly be a substantially broken combination, which I don't think we need to allow for at all. The test in question was added by: Thu Jan 27 16:46:03 1994 Roland McGrath (roland@churchy.gnu.ai.mit.edu) * configure.in (asm-CPPFLAGS): Add new check to see if assembling a .S file loses without -P. If so, set asm-CPPFLAGS=-P in config.make. This patch removes the test and the reference to this issue in the comment on the default empty definition of asm-CPPFLAGS. (Various other settings of asm-CPPFLAGS remain in sysdeps Makefile fragments.) Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_need_minus_P): Remove configure test. * configure: Regenerated. * Makeconfig (asm-CPPFLAGS): Remove reference to -P in comment.
2015-10-26Remove support for removing glibc 2.0 headers.Joseph Myers
There is a configure test for the presence of glibc 2.0 headers (that were renamed / no longer installed in glibc 2.1) and associated support for removing them on "make install". Normal practice for subsequent removal / renaming of installed files has been not to do anything special about removing them; if you want installed files from an old installation removed reliably, you need to use a packaging system that tracks what files were installed by a previous glibc package (via installing in an intermediate directory with install_root). I think it's been long enough since 2.0 that it's not particularly useful to have that special logic for those old headers either; this patch removes it. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (old_glibc_headers): Remove configure test. * configure: Regenerated. * config.make.in (old-glibc-headers): Remove variable. * Makefile [!$(install_root) && $(old-glibc-headers) = yes] (install): Remove dependency on remove-old-headers. (headers2_0): Remove variable. (remove-old-headers): Remove rule.
2015-10-26Remove configure test for assembler .text directive.Joseph Myers
There is a configure test for assembler support for the .text directive. I suppose this test must have been aimed at some non-ELF platform or non-GNU assembler. Certainly the GNU assembler has had ELF-specific architecture-independent handling for .text since version 2.2, and generic non-ELF-specific support predates that. This patch removes this test as obsolete. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_dot_text): Remove configure test. (libc_cv_asm_set_directive): Use .text instead of ${libc_cv_dot_text} in configure test. * configure: Regenerated.
2015-10-26Use the CXX compiler only if it can create dynamic and static programsFlorian Weimer
* configure.ac (CXX): Clear the variable if the C++ toolchain does not support static linking. * configure: Regenerate.
2015-10-19Remove gnu_unique_object configure test.Joseph Myers
There is a configure test for assembler support for the gnu_unique_object symbol type. This support was added in binutils 2.20, so is present in all versions supported for building glibc. Thus, I think the configure test can be removed; this patch does so. Now, there is a caveat that the gas NEWS entry refers to this as a feature for GNU/Linux targets. But the condition is use of ELFOSABI_GNU or ELFOSABI_NONE. ELFOSABI_GNU covers Hurd as well as GNU/Linux (as was the case with the older ELFOSABI_LINUX name), and ELFOSABI_NONE means this is effectively OS-independent. Furthermore, I think a correct binutils port for any glibc target ought to support this feature for use with glibc; glibc supports this as an OS-independent feature (the configure test is only about glibc testcases). Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_unique_object): Remove configure test. * configure: Regenerated. * config.h.in (HAVE_ASM_UNIQUE_OBJECT): Remove #undef. * elf/tst-unique1.c (do_test) [HAVE_ASM_UNIQUE_OBJECT]: Make code unconditional. * elf/tst-unique1mod1.c [HAVE_ASM_UNIQUE_OBJECT]: Likewise. * elf/tst-unique1mod2.c [HAVE_ASM_UNIQUE_OBJECT]: Likewise. * elf/tst-unique2.c (do_test) [HAVE_ASM_UNIQUE_OBJECT]: Likewise. (do_test) [!HAVE_ASM_UNIQUE_OBJECT]: Remove conditional code. * elf/tst-unique2mod1.c [HAVE_ASM_UNIQUE_OBJECT]: Make code unconditional. * elf/tst-unique2mod2.c [HAVE_ASM_UNIQUE_OBJECT]: Likewise.
2015-10-19use -fstack-protector-strong when availableMike Frysinger
With gcc-4.9, a new -fstack-protector-strong flag is available that is between -fstack-protector (pretty weak) and -fstack-protector-all (pretty strong) that provides good trade-offs between overhead but still providing good coverage. Update the places in glibc that use ssp to use this flag when it's available. This also kills off the indirection of hardcoding the flag name in the Makefiles and adding it based on a have-ssp boolean. Instead, the build always expands the $(stack-protector) variable to the best ssp setting. This makes the build logic a bit simpler and allows people to easily set to a diff flag like: make stack-protector=-fstack-protector-all
2015-10-19timezone: polish grammar a bit in documentationMike Frysinger
Reported-by: ricaljasan@pacific.net
2015-10-19Remove -fgnu89-inline configure test.Joseph Myers
There is a configure test for -fgnu89-inline. This option was added in GCC 4.2, so the test is obsolete; this patch removes it. Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_gnu89_inline): Remove configure test. * configure: Regenerated. * config.make.in (gnu89-inline-CFLAGS): Remove variable. * Makeconfig (CFLAGS): Use -fgnu89-inline instead of $(gnu89-inline-CFLAGS).
2015-10-19Remove .weak, .weakext configure tests.Joseph Myers
There are configure tests for assembler .weak support, and, as a fallback, for .weakext support. .weakext appears to be an ECOFF thing (although a few ELF targets support it as well). .weak has been supported by the GNU assembler for ELF targets since version 2.2, so given the requirement for ELF the configure tests are obsolete; this patch removes them. Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_weak_directive): Remove configure test. (libc_cv_asm_weakext_directive): Likewise. * configure: Regenerated. * config.h.in (HAVE_ASM_WEAK_DIRECTIVE): Remove #undef. (HAVE_ASM_WEAKEXT_DIRECTIVE): Likewise. * include/libc-symbols.h [!HAVE_ASM_WEAK_DIRECTIVE && !HAVE_ASM_WEAKEXT_DIRECTIVE]: Remove #error. [HAVE_ASM_WEAKEXT_DIRECTIVE]: Remove conditional code. [!HAVE_ASM_WEAKEXT_DIRECTIVE]: Make code unconditional.
2015-10-15Remove -Bgroup configure test.Joseph Myers
There is a configure test for the -Bgroup linker option whose results aren't used anywhere. This patch removes that test. Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_Bgroup): Remove configure test. * configure: Regenerated. * config.make.in (have-Bgroup): Remove variable.
2015-10-15Remove sizeof (long double) configure test.Joseph Myers
There is a configure test for sizeof (long double) whose results aren't used anywhere. This patch removes that test. Tested for x86_64 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (sizeof_long_double): Remove configure test. * configure: Regenerated. * config.make.in (sizeof-long-double): Remove variable.
2015-10-15Remove -fexceptions configure test.Joseph Myers
There is a configure test for -fexceptions. This option was added in GCC 2.8, so the test is obsolete - and indeed plenty of code is using -fexceptions directly. This patch removes the configure test and makes all uses of $(exceptions) use -fexceptions directly. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_gcc_exceptions): Remove configure test. * configure: Regenerated. * sysdeps/arm/configure.ac (libc_cv_gcc_exceptions): Do not set variable. (exceptions): Likewise. * sysdeps/arm/configure: Regenerated. * config.make.in (exceptions): Remove variable. * Makeconfig (uses-callbacks): Use -fexceptions instead of $(exceptions). * debug/Makefile (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-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. * libio/Makefile (CFLAGS-fileops.c): Likewise. (CFLAGS-fputc.c): Likewise. (CFLAGS-fputwc.c): Likewise. (CFLAGS-freopen64.c): Likewise. (CFLAGS-freopen.c): Likewise. (CFLAGS-fseek.c): Likewise. (CFLAGS-fseeko64.c): Likewise. (CFLAGS-fseeko.c): Likewise. (CFLAGS-ftello64.c): Likewise. (CFLAGS-ftello.c): Likewise. (CFLAGS-fwide.c): Likewise. (CFLAGS-genops.c): Likewise. (CFLAGS-getc.c): Likewise. (CFLAGS-getchar.c): Likewise. (CFLAGS-getwc.c): Likewise. (CFLAGS-getwchar.c): Likewise. (CFLAGS-iofclose.c): Likewise. (CFLAGS-iofflush.c): Likewise. (CFLAGS-iofgetpos64.c): Likewise. (CFLAGS-iofgetpos.c): Likewise. (CFLAGS-iofgets.c): Likewise. (CFLAGS-iofgetws.c): Likewise. (CFLAGS-iofputs.c): Likewise. (CFLAGS-iofputws.c): Likewise. (CFLAGS-iofread.c): Likewise. (CFLAGS-iofsetpos64.c): Likewise. (CFLAGS-iofsetpos.c): Likewise. (CFLAGS-ioftell.c): Likewise. (CFLAGS-iofwrite.c): Likewise. (CFLAGS-iogetdelim.c): Likewise. (CFLAGS-iogetline.c): Likewise. (CFLAGS-iogets.c): Likewise. (CFLAGS-iogetwline.c): Likewise. (CFLAGS-ioputs.c): Likewise. (CFLAGS-ioseekoff.c): Likewise. (CFLAGS-ioseekpos.c): Likewise. (CFLAGS-iosetbuffer.c): Likewise. (CFLAGS-iosetvbuf.c): Likewise. (CFLAGS-ioungetc.c): Likewise. (CFLAGS-ioungetwc.c): Likewise. (CFLAGS-oldfileops.c): Likewise. (CFLAGS-oldiofclose.c): Likewise. (CFLAGS-oldiofgetpos64.c): Likewise. (CFLAGS-oldiofgetpos.c): Likewise. (CFLAGS-oldiofsetpos64.c): Likewise. (CFLAGS-oldiofsetpos.c): Likewise. (CFLAGS-peekc.c): Likewise. (CFLAGS-putc.c): Likewise. (CFLAGS-putchar.c): Likewise. (CFLAGS-putwc.c): Likewise. (CFLAGS-putwchar.c): Likewise. (CFLAGS-rewind.c): Likewise. (CFLAGS-wfileops.c): Likewise. (CFLAGS-wgenops.c): Likewise. (CFLAGS-oldiofopen.c): Likewise. (CFLAGS-iofopen.c): Likewise. (CFLAGS-iofopen64.c): Likewise. (CFLAGS-oldtmpfile.c): Likewise. * stdio-common/Makefile (CFLAGS-vfprintf.c): Likewise. (CFLAGS-fprintf.c): Likewise. (CFLAGS-printf.c): Likewise. (CFLAGS-vfwprintf.c): Likewise. (CFLAGS-vfscanf.c): Likewise. (CFLAGS-vfwscanf.c): Likewise. (CFLAGS-fscanf.c): Likewise. (CFLAGS-scanf.c): Likewise. (CFLAGS-isoc99_vfscanf.c): Likewise. (CFLAGS-isoc99_vscanf.c): Likewise. (CFLAGS-isoc99_fscanf.c): Likewise. (CFLAGS-isoc99_scanf.c): Likewise. * wcsmbs/Makefile (CFLAGS-isoc99_wscanf.c): Likewise. (CFLAGS-isoc99_fwscanf.c): Likewise. (CFLAGS-isoc99_vwscanf.c): Likewise. (CFLAGS-isoc99_vfwscanf.c): Likewise.
2015-10-15Remove .previous, .popsection configure tests.Joseph Myers
There is a configure test for the assembler .previous directive, and, as a fallback, for .popsection. glibc now only supports ELF. For ELF, the GNU assembler has supported .previous since version 2.2 (support added by Mon Jul 19 15:21:20 1993 Ken Raeburn (raeburn@rtl.cygnus.com) * config/obj-elf.c (obj_elf_previous): New function. (previous_section, previous_subsection): New vars. (obj_elf_section): Save current place in case DWARF code wants us to pop back to it. Handle unquoted section name as well as quoted section name. Don't crash on invalid strings. (obj_pseudo_table): Handle new pseudos "previous", "2byte", and "4byte". ). Thus this configure test is obsolete, and this patch removes it (and with it the fallback .popsection test). Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_asm_previous_directive): Remove configure test. (libc_cv_asm_popsection_directive): Likewise. * configure: Regenerated. * config.h.in (HAVE_ASM_PREVIOUS_DIRECTIVE): Remove #undef. (HAVE_ASM_POPSECTION_DIRECTIVE): Likewise. * include/libc-symbols.h [HAVE_ASM_PREVIOUS_DIRECTIVE] (__make_section_unallocated): Make definition unconditional. [HAVE_ASM_POPSECTION_DIRECTIVE] (__make_section_unallocated): Remove conditional definition. [!HAVE_ASM_PREVIOUS_DIRECTIVE && !HAVE_ASM_POPSECTION_DIRECTIVE] (__make_section_unallocated): Likewise.
2015-10-15Remove -static-libgcc configure test.Joseph Myers
There is a configure test for -static-libgcc. GCC added this option in version 3.0, so this test is obsolete; this patch removes it. Tested for x86_64 and x86 (testsuite, and that installed shared libraries are unchanged by the patch). * configure.ac (libc_cv_gcc_static_libgcc): Remove configure test. * configure: Regenerated. * config.make.in (static-libgcc): Remove variable. * Makerules (build-shlib-helper): Use -static-libgcc instead of $(static-libgcc). (build-module-helper): Likewise.
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