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* Update newest tested versions of dependencies in install.texiSiddhesh Poyarekar2020-02-011-5/+5
| | | | Updated versions of gcc, binutils, awk, bison and perl.
* Prefer https to http for gnu.org and fsf.org URLsPaul Eggert2019-09-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* Update install and NEWS for 2.30 release.Carlos O'Donell2019-08-011-5/+5
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* Extend BIND_NOW to installed programs with --enable-bind-nowFlorian Weimer2019-04-251-4/+4
| | | | | | | | Commit 2d6ab5df3b675e96ee587ae6a8c2ce004c6b1ba9 ("Document and fix --enable-bind-now [BZ #21015]") extended BIND_NOW to all installed shared objects. This change also covers installed programs. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Require GCC 6.2 or later to build glibc.Joseph Myers2019-02-011-7/+2
| | | | | | | | | | | | | | | | | | | | | | | | As discussed during development for glibc 2.29, when we increased the required minimum GCC version for building glibc to GCC 5, working purely based on the times at which such requirements have been increased in the past it would be appropriate for glibc 2.30 to require GCC 6 (matching GCC 4.9 having been required for glibc 2.26). Naming 6.2 specifically as the minimum version then means a separate version requirement no longer needs to be specified for powerpc64le. Thus, this patch increases the minimum to 6.2, removing the documentation of the separate requirement for powerpc64le. It does not remove the powerpc64le configure test, or any __GNUC_PREREQ that could be removed as not being in installed headers or files shared with gnulib; I think such cleanups are best done separately. Tested for x86_64. * configure.ac (libc_cv_compiler_ok): Require GCC 6.2 or later. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Update minimum GCC version. * INSTALL: Regenerated.
* Prepare for 2.29 releaseSiddhesh Poyarekar2019-01-311-7/+7
| | | | | | | | | * NEWS: Add the list of bugs fixed in 2.29. * manual/contrib.texi: Update contributors list with some more names. * manual/install.texi: Update latest versions of packages tested. * INSTALL: Regenerated.
* Require GCC 5 or later to build glibc (bug 23993).Joseph Myers2018-12-211-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | We know that building glibc with GCC 4.9 is broken on various platforms (bug 23993). As it's more than a year since we last increased the minimum GCC version to build glibc, this patch changes the requirement to be GCC 5 or later (indeed, based on 4.9 having been required for building 2.26, it would be consistent in terms of timing to require GCC 6 or later from the 2.30 release onwards). It deliberately just updates the configure test and corresponding documentation, leaving removal of no-longer-needed __GNUC_PREREQ tests for a separate patch. In the NEWS entry, the requirement for a newer GCC version for powerpc64le is reiterated (as in the entry for the 4.9 requirement in 2.26) to avoid suggesting the version requirement there has gone down. (If that version goes up further as part of support for binary128 long double, of course the wording would change at that time.) Tested for x86_64. [BZ #23993] * configure.ac (libc_cv_compiler_ok): Require GCC 5 or later. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Update minimum GCC version. * INSTALL: Regenerated.
* locale: Rewrite locale/gen-translit.pl in PythonFlorian Weimer2018-12-181-4/+3
| | | | | | This commit does not change the generated output file. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* Patch to require Python 3.4 or later to build glibc.Joseph Myers2018-10-291-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes Python 3.4 or later a required tool for building glibc, so allowing changes of awk, perl etc. code used in the build and test to Python code without any such changes needing makefile conditionals or to handle older Python versions. This patch makes the configure test for Python check the version and give an error if Python is missing or too old, and removes makefile conditionals that are no longer needed. It does not itself convert any code from another language to Python, and does not remove any compatibility with older Python versions from existing scripts. Tested for x86_64. * configure.ac (PYTHON_PROG): Use AC_CHECK_PROG_VER. Set critic_missing for versions before 3.4. * configure: Regenerated. * manual/install.texi (Tools for Compilation): Document requirement for Python to build glibc. * INSTALL: Regenerated. * Rules [PYTHON]: Make code unconditional. * benchtests/Makefile [PYTHON]: Likewise. * conform/Makefile [PYTHON]: Likewise. * manual/Makefile [PYTHON]: Likewise. * math/Makefile [PYTHON]: Likewise.
* Use gen-libm-test.py to generate ulps table for manual.Joseph Myers2018-10-241-2/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch extends gen-libm-test.py to generate the ulps table for the manual, so meaning there is only a single ulps file parser needed and another Perl script is eliminated. As with the introduction of gen-libm-test.py, this is designed to generate exactly the same libm-err.texi as libm-err-tab.pl did. (gen-libm-test.py is still shorter in lines than the old gen-libm-test.pl even after this patch.) Note that this introduces a Python dependency for building the manual, which is thus noted in install.texi and NEWS. Tested building html / info / pdf versions of the manual. * math/gen-libm-test.py: Import os. (ALL_FLOATS_MANUAL): New constant. (ALL_FLOATS_SUFFIX): Likewise. (Ulps.all_functions): New function. (real_all_ulps): Likewise. (generate_err_table_sub): Likewise. (generate_err_table): Likewise. (main): Handle -s and -m options. * manual/libm-err-tab.pl: Remove. * manual/Makefile ($(objpfx)stamp-libm-err): Use gen-libm-test.py instead of libm-err-tab.pl. [$(PERL) != no]: Change condition to [$(if $(PYTHON),$(PERL),no) != no]. * manual/install.texi (Tools for Compilation): Document requirement for Python to build manual. * INSTALL: Regenerated.
* Don't build libnsl for new ABIsAndreas Schwab2018-09-241-1/+4
| | | | | | For architectures and ABIs that are added in version 2.29 or later the option --enable-obsolete-nsl is no longer available, and no libnsl compatibility library is built.
* Add --with-nonshared-cflags option to configureFlorian Weimer2018-08-171-0/+16
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* Update install.texi documentation of uses of Perl and Python.Joseph Myers2018-08-131-36/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The install.texi documentation of uses of Perl and Python is substantially out of date. The description of Perl is "to test the installation" (which I interpret as referring to test-installation.pl), but it's used for more tests than that, and to build the manual, and to regenerate one file in the source tree. The description of Python is only for pretty-printer tests, but it's used for other tests / benchmarks as well (and for other internal uses such as updating Unicode data, for which we already require Python 3, but I think install.texi only needs to describe uses from the main glibc Makefiles). This patch updates the descriptions of what those tools are used for. The Python information (and information about other tools for testing pretty printers) was awkwardly in the middle of the general description of building and testing glibc, rather than with the rest of information about tools used in glibc build and test; this patch moves the information about those tools into the main list. Tested with regeneration of INSTALL as well as "make info" and "make pdf". * manual/install.texi (Configuring and compiling): Do not list tools used for testing pretty printers here. (Tools for Compilation): List Python, PExpect and GDB here. Update descriptions of uses of Perl and Python. * INSTALL: Regenerate.
* Add convenience target 'install-locale-files'.Carlos O'Donell2018-08-021-6/+26
| | | | | | | | | The convenience install target 'install-locale-files' is created to allow distributions to install all of the SUPPORTED locales as files instead of into the locale-archive. You invoke the new convenience target like this: make localedata/install-locale-files DESTDIR=<prefix>
* Update tooling versions verified to work with glibc.Carlos O'Donell2018-07-311-10/+23
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* INSTALL: Add a note for Intel CET statusH.J. Lu2018-07-191-0/+5
| | | | | | * NEWS: Add a note for Intel CET status. * manual/install.texi: Likewise. * INSTALL: Regenerated.
* Intel CET: Document --enable-cetH.J. Lu2018-07-181-0/+11
| | | | | | * NEWS: Mention --enable-cet. * manual/install.texi: Document --enable-cet. * INSTALL: Regenerated.
* testrun.sh: Implement --tool=strace, --tool=valgrindFlorian Weimer2018-07-041-7/+1
| | | | | | | | $(file …) appears to be the only convenient way to create files with newlines and make substitution variables. This needs make 4.0 (released in 2013), so update the requirement to match. Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* New configure option --disable-crypt.Zack Weinberg2018-06-291-0/+11
| | | | | | | | Some Linux distributions are experimenting with a new, separately maintained and hopefully more agile implementation of the crypt API. To facilitate this, add a configure option which disables glibc's embedded libcrypt. When this option is given, libcrypt.* and crypt.h will not be built nor installed.
* Document use of CC and CFLAGS in more detail (bug 20980, bug 21234).Joseph Myers2018-02-151-5/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | There are some bug reports from people setting CFLAGS not including a -O option and then being confused when the build fails. This patch addresses this by documenting the proper use of CC and CFLAGS in more detail - saying what options should go where and specifying the requirement to compile with optimization. The previous text incorrectly used @var markup with CC and CFLAGS. The correct markup for environment variables is @env, but it's also the case that passing such variables explicitly on the configure command line is preferred to passing them in the environment, so this patch changes the documentation to describe passing them on the command line (and uses @code). In many cases putting options in the wrong place may in fact work, but I believe what I've specified is the correct rule for which options to put where. [BZ #20980] [BZ #21234] * manual/install.texi (Configuring and compiling): Describe passing CC and CFLAGS on configure command line, not as environment variables. Use @code markup on those variables. Specify what options go in CC and what go in CFLAGS. Note the requirement to compile with optimization. * INSTALL: Regenerated.
* Fix typo in the previous commitDmitry V. Levin2018-01-311-1/+1
| | | | The version of GCC was 7.3, not 7.3.1.
* Update information about the newest versions of tools used to build glibcDmitry V. Levin2018-01-311-6/+7
| | | | | | * manual/install.texi (Tools for Compilation): Update the newest versions of gcc, binutils, texinfo, gawk, bison, and sed. * INSTALL: Regenerated.
* Document that --enable-static-pie implies PIEH.J. Lu2017-12-191-1/+3
| | | | | | | | | | | | | | To build static PIE, all .o files are compiled with -fPIE. Since --enable-static-pie is designed to provide additional security hardening benefits, it also implies that glibc programs and tests are created as dynamic position independent executables (PIE) by default for better security hardening. Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> * manual/install.texi: Document that --enable-static-pie implies PIE. * INSTALL: Regenerated.
* Add --enable-static-pie configure option to build static PIE [BZ #19574]H.J. Lu2017-12-151-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Static PIE extends address space layout randomization to static executables. It provides additional security hardening benefits at the cost of some memory and performance. Dynamic linker, ld.so, is a standalone program which can be loaded at any address. This patch adds a configure option, --enable-static-pie, to embed the part of ld.so in static executable to create static position independent executable (static PIE). A static PIE is similar to static executable, but can be loaded at any address without help from a dynamic linker. When --enable-static-pie is used to configure glibc, libc.a is built as PIE and all static executables, including tests, are built as static PIE. The resulting libc.a can be used together with GCC 8 or above to build static PIE with the compiler option, -static-pie. But GCC 8 isn't required to build glibc with --enable-static-pie. Only GCC with PIE support is needed. When an older GCC is used to build glibc with --enable-static-pie, proper input files are passed to linker to create static executables as static PIE, together with "-z text" to prevent dynamic relocations in read-only segments, which are not allowed in static PIE. The following changes are made for static PIE: 1. Add a new function, _dl_relocate_static_pie, to: a. Get the run-time load address. b. Read the dynamic section. c. Perform dynamic relocations. Dynamic linker also performs these steps. But static PIE doesn't load any shared objects. 2. Call _dl_relocate_static_pie at entrance of LIBC_START_MAIN in libc.a. crt1.o, which is used to create dynamic and non-PIE static executables, is updated to include a dummy _dl_relocate_static_pie. rcrt1.o is added to create static PIE, which will link in the real _dl_relocate_static_pie. grcrt1.o is also added to create static PIE with -pg. GCC 8 has been updated to support rcrt1.o and grcrt1.o for static PIE. Static PIE can work on all architectures which support PIE, provided: 1. Target must support accessing of local functions without dynamic relocations, which is needed in start.S to call __libc_start_main with function addresses of __libc_csu_init, __libc_csu_fini and main. All functions in static PIE are local functions. If PIE start.S can't reach main () defined in a shared object, the code sequence: pass address of local_main to __libc_start_main ... local_main: tail call to main via PLT can be used. 2. start.S is updated to check PIC instead SHARED for PIC code path and avoid dynamic relocation, when PIC is defined and SHARED isn't defined, to support static PIE. 3. All assembly codes are updated check PIC instead SHARED for PIC code path to avoid dynamic relocations in read-only sections. 4. All assembly codes are updated check SHARED instead PIC for static symbol name. 5. elf_machine_load_address in dl-machine.h are updated to support static PIE. 6. __brk works without TLS nor dynamic relocations in read-only section so that it can be used by __libc_setup_tls to initializes TLS in static PIE. NB: When glibc is built with GCC defaulted to PIE, libc.a is compiled with -fPIE, regardless if --enable-static-pie is used to configure glibc. When glibc is configured with --enable-static-pie, libc.a is compiled with -fPIE, regardless whether GCC defaults to PIE or not. The same libc.a can be used to build both static executable and static PIE. There is no need for separate PIE copy of libc.a. On x86-64, the normal static sln: text data bss dec hex filename 625425 8284 5456 639165 9c0bd elf/sln the static PIE sln: text data bss dec hex filename 657626 20636 5392 683654 a6e86 elf/sln The code size is increased by 5% and the binary size is increased by 7%. Linker requirements to build glibc with --enable-static-pie: 1. Linker supports --no-dynamic-linker to remove PT_INTERP segment from static PIE. 2. Linker can create working static PIE. The x86-64 linker needs the fix for https://sourceware.org/bugzilla/show_bug.cgi?id=21782 The i386 linker needs to be able to convert "movl main@GOT(%ebx), %eax" to "leal main@GOTOFF(%ebx), %eax" if main is defined locally. Binutils 2.29 or above are OK for i686 and x86-64. But linker status for other targets need to be verified. 3. Linker should resolve undefined weak symbols to 0 in static PIE: https://sourceware.org/bugzilla/show_bug.cgi?id=22269 4. Many ELF backend linkers incorrectly check bfd_link_pic for TLS relocations, which should check bfd_link_executable instead: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 Tested on aarch64, i686 and x86-64. Using GCC 7 and binutils master branch, build-many-glibcs.py with --enable-static-pie with all patches for static PIE applied have the following build successes: PASS: glibcs-aarch64_be-linux-gnu build PASS: glibcs-aarch64-linux-gnu build PASS: glibcs-armeb-linux-gnueabi-be8 build PASS: glibcs-armeb-linux-gnueabi build PASS: glibcs-armeb-linux-gnueabihf-be8 build PASS: glibcs-armeb-linux-gnueabihf build PASS: glibcs-arm-linux-gnueabi build PASS: glibcs-arm-linux-gnueabihf build PASS: glibcs-arm-linux-gnueabihf-v7a build PASS: glibcs-arm-linux-gnueabihf-v7a-disable-multi-arch build PASS: glibcs-m68k-linux-gnu build PASS: glibcs-microblazeel-linux-gnu build PASS: glibcs-microblaze-linux-gnu build PASS: glibcs-mips64el-linux-gnu-n32 build PASS: glibcs-mips64el-linux-gnu-n32-nan2008 build PASS: glibcs-mips64el-linux-gnu-n32-nan2008-soft build PASS: glibcs-mips64el-linux-gnu-n32-soft build PASS: glibcs-mips64el-linux-gnu-n64 build PASS: glibcs-mips64el-linux-gnu-n64-nan2008 build PASS: glibcs-mips64el-linux-gnu-n64-nan2008-soft build PASS: glibcs-mips64el-linux-gnu-n64-soft build PASS: glibcs-mips64-linux-gnu-n32 build PASS: glibcs-mips64-linux-gnu-n32-nan2008 build PASS: glibcs-mips64-linux-gnu-n32-nan2008-soft build PASS: glibcs-mips64-linux-gnu-n32-soft build PASS: glibcs-mips64-linux-gnu-n64 build PASS: glibcs-mips64-linux-gnu-n64-nan2008 build PASS: glibcs-mips64-linux-gnu-n64-nan2008-soft build PASS: glibcs-mips64-linux-gnu-n64-soft build PASS: glibcs-mipsel-linux-gnu build PASS: glibcs-mipsel-linux-gnu-nan2008 build PASS: glibcs-mipsel-linux-gnu-nan2008-soft build PASS: glibcs-mipsel-linux-gnu-soft build PASS: glibcs-mips-linux-gnu build PASS: glibcs-mips-linux-gnu-nan2008 build PASS: glibcs-mips-linux-gnu-nan2008-soft build PASS: glibcs-mips-linux-gnu-soft build PASS: glibcs-nios2-linux-gnu build PASS: glibcs-powerpc64le-linux-gnu build PASS: glibcs-powerpc64-linux-gnu build PASS: glibcs-tilegxbe-linux-gnu-32 build PASS: glibcs-tilegxbe-linux-gnu build PASS: glibcs-tilegx-linux-gnu-32 build PASS: glibcs-tilegx-linux-gnu build PASS: glibcs-tilepro-linux-gnu build and the following build failures: FAIL: glibcs-alpha-linux-gnu build elf/sln is failed to link due to: assertion fail bfd/elf64-alpha.c:4125 This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-hppa-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault] https://sourceware.org/bugzilla/show_bug.cgi?id=22537 FAIL: glibcs-ia64-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault] FAIL: glibcs-powerpc-linux-gnu build FAIL: glibcs-powerpc-linux-gnu-soft build FAIL: glibcs-powerpc-linux-gnuspe build FAIL: glibcs-powerpc-linux-gnuspe-e500v1 build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22264 FAIL: glibcs-powerpc-linux-gnu-power4 build elf/sln is failed to link due to: findlocale.c:96:(.text+0x22c): @local call to ifunc memchr This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-s390-linux-gnu build elf/sln is failed to link due to: collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core dumped assertion fail bfd/elflink.c:14299 This is caused by linker bug and/or non-PIC code in PIE libc.a. FAIL: glibcs-sh3eb-linux-gnu build FAIL: glibcs-sh3-linux-gnu build FAIL: glibcs-sh4eb-linux-gnu build FAIL: glibcs-sh4eb-linux-gnu-soft build FAIL: glibcs-sh4-linux-gnu build FAIL: glibcs-sh4-linux-gnu-soft build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 Also TLS code sequence in SH assembly syscalls in glibc doesn't match TLS code sequence expected by ld: https://sourceware.org/bugzilla/show_bug.cgi?id=22270 FAIL: glibcs-sparc64-linux-gnu build FAIL: glibcs-sparcv9-linux-gnu build FAIL: glibcs-tilegxbe-linux-gnu build FAIL: glibcs-tilegxbe-linux-gnu-32 build FAIL: glibcs-tilegx-linux-gnu build FAIL: glibcs-tilegx-linux-gnu-32 build FAIL: glibcs-tilepro-linux-gnu build elf/sln is failed to link due to: ld: read-only segment has dynamic relocations. This is caused by linker bug and/or non-PIC code in PIE libc.a. See: https://sourceware.org/bugzilla/show_bug.cgi?id=22263 [BZ #19574] * INSTALL: Regenerated. * Makeconfig (real-static-start-installed-name): New. (pic-default): Updated for --enable-static-pie. (pie-default): New for --enable-static-pie. (default-pie-ldflag): Likewise. (+link-static-before-libc): Replace $(DEFAULT-LDFLAGS-$(@F)) with $(if $($(@F)-no-pie),$(no-pie-ldflag),$(default-pie-ldflag)). Replace $(static-start-installed-name) with $(real-static-start-installed-name). (+prectorT): Updated for --enable-static-pie. (+postctorT): Likewise. (CFLAGS-.o): Add $(pie-default). (CFLAGS-.op): Likewise. * NEWS: Mention --enable-static-pie. * config.h.in (ENABLE_STATIC_PIE): New. * configure.ac (--enable-static-pie): New configure option. (have-no-dynamic-linker): New LIBC_CONFIG_VAR. (have-static-pie): Likewise. Enable static PIE if linker supports --no-dynamic-linker. (ENABLE_STATIC_PIE): New AC_DEFINE. (enable-static-pie): New LIBC_CONFIG_VAR. * configure: Regenerated. * csu/Makefile (omit-deps): Add r$(start-installed-name) and gr$(start-installed-name) for --enable-static-pie. (extra-objs): Likewise. (install-lib): Likewise. (extra-objs): Add static-reloc.o and static-reloc.os ($(objpfx)$(start-installed-name)): Also depend on $(objpfx)static-reloc.o. ($(objpfx)r$(start-installed-name)): New. ($(objpfx)g$(start-installed-name)): Also depend on $(objpfx)static-reloc.os. ($(objpfx)gr$(start-installed-name)): New. * csu/libc-start.c (LIBC_START_MAIN): Call _dl_relocate_static_pie in libc.a. * csu/libc-tls.c (__libc_setup_tls): Add main_map->l_addr to initimage. * csu/static-reloc.c: New file. * elf/Makefile (routines): Add dl-reloc-static-pie. (elide-routines.os): Likewise. (DEFAULT-LDFLAGS-tst-tls1-static-non-pie): Removed. (tst-tls1-static-non-pie-no-pie): New. * elf/dl-reloc-static-pie.c: New file. * elf/dl-support.c (_dl_get_dl_main_map): New function. * elf/dynamic-link.h (ELF_DURING_STARTUP): Also check STATIC_PIE_BOOTSTRAP. * elf/get-dynamic-info.h (elf_get_dynamic_info): Likewise. * gmon/Makefile (tests): Add tst-gmon-static-pie. (tests-static): Likewise. (DEFAULT-LDFLAGS-tst-gmon-static): Removed. (tst-gmon-static-no-pie): New. (CFLAGS-tst-gmon-static-pie.c): Likewise. (CRT-tst-gmon-static-pie): Likewise. (tst-gmon-static-pie-ENV): Likewise. (tests-special): Likewise. ($(objpfx)tst-gmon-static-pie.out): Likewise. (clean-tst-gmon-static-pie-data): Likewise. ($(objpfx)tst-gmon-static-pie-gprof.out): Likewise. * gmon/tst-gmon-static-pie.c: New file. * manual/install.texi: Document --enable-static-pie. * sysdeps/generic/ldsodefs.h (_dl_relocate_static_pie): New. (_dl_get_dl_main_map): Likewise. * sysdeps/i386/configure.ac: Check if linker supports static PIE. * sysdeps/x86_64/configure.ac: Likewise. * sysdeps/i386/configure: Regenerated. * sysdeps/x86_64/configure: Likewise. * sysdeps/mips/Makefile (ASFLAGS-.o): Add $(pie-default). (ASFLAGS-.op): Likewise.
* Remove --with-fp / --without-fp.Joseph Myers2017-12-121-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a configure option --without-fp that specifies that nofpu sysdeps directories should be used instead of fpu directories. For most glibc configurations, this option is of no use: either there is no valid nofpu variant of that configuration, or there are no fpu or nofpu sysdeps directories for that processor and so the option does nothing. For a few configurations, if you are using a soft-float compiler this option is required, and failing to use it generally results in compilation errors from inline asm using unavailable floating-point instructions. We're moving away from --with-cpu to configuring glibc based on how the compiler generates code, and it is natural to do so for --without-fp as well; in most cases the soft-float and hard-float ABIs are incompatible so you have no hope of building a working glibc with an inappropriately configured compiler or libgcc. This patch eliminates --without-fp, replacing it entirely by automatic configuration based on the compiler. Configurations for which this is relevant (coldfire / mips / powerpc32 / sh) define a variable with_fp_cond in their preconfigure fragments (under the same conditions under which those fragments do anything); this is a preprocessor conditional which the toplevel configure script then uses in a test to determine which sysdeps directories to use. The config.make with-fp variable remains. It's used only by powerpc (sysdeps/powerpc/powerpc32/Makefile) to add -mhard-float to various flags variables. For powerpc, -mcpu= options can imply use of soft-float. That could be an issue if you want to build for e.g. 476fp, but are using --with-cpu=476 because there isn't a 476fp sysdeps directory. If in future we eliminate --with-cpu and replace it entirely by testing the compiler, it would be natural at that point to eliminate that code as well (as the user should then just use a compiler defaulting to 476fp and the 476 sysdeps directory would be used automatically). Tested for x86_64, and tested with build-many-glibcs.py that installed shared libraries are unchanged by this patch. * configure.ac (--with-fp): Remove configure option. (with_fp_cond): New variable. (libc_cv_with_fp): New configure test. Use this variable instead of with_fp. * configure: Regenerated. * config.make.in (with-fp): Use @libc_cv_with_fp@. * manual/install.texi (Configuring and compiling): Remove --without-fp. * INSTALL: Regenerated. * sysdeps/m68k/preconfigure (with_fp_cond): Define for ColdFire. * sysdeps/mips/preconfigure (with_fp_cond): Define. * sysdeps/powerpc/preconfigure (with_fp_cond): Define for 32-bit. * sysdeps/sh/preconfigure (with_fp_cond): Define. * scripts/build-many-glibcs.py (Context.add_all_configs): Do not use --without-fp to configure glibc.
* Add elision tunablesRogerio Alves2017-12-051-3/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds several new tunables to control the behavior of elision on supported platforms[1]. Since elision now depends on tunables, we should always *compile* with elision enabled, and leave the code disabled, but available for runtime selection. This gives us *much* better compile-time testing of the existing code to avoid bit-rot[2]. Tested on ppc, ppc64, ppc64le, s390x and x86_64. [1] This part of the patch was initially proposed by Paul Murphy but was "staled" because the framework have changed since the patch was originally proposed: https://patchwork.sourceware.org/patch/10342/ [2] This part of the patch was inititally proposed as a RFC by Carlos O'Donnell. Make sense to me integrate this on the patch: https://sourceware.org/ml/libc-alpha/2017-05/msg00335.html * elf/dl-tunables.list: Add elision parameters. * manual/tunables.texi: Add entries about elision tunable. * sysdeps/unix/sysv/linux/powerpc/elision-conf.c: Add callback functions to dynamically enable/disable elision. Add multiple callbacks functions to set elision parameters. Deleted __libc_enable_secure check. * sysdeps/unix/sysv/linux/s390/elision-conf.c: Likewise. * sysdeps/unix/sysv/linux/x86/elision-conf.c: Likewise. * configure: Regenerated. * configure.ac: Option enable_lock_elision was deleted. * config.h.in: ENABLE_LOCK_ELISION flag was deleted. * config.make.in: Remove references to enable_lock_elision. * manual/install.texi: Elision configure option was removed. * INSTALL: Regenerated to remove enable_lock_elision. * nptl/Makefile: Disable elision so it can verify error case for destroying a mutex. * sysdeps/powerpc/nptl/elide.h: Cleanup ENABLE_LOCK_ELISION check. Deleted macros for the case when ENABLE_LOCK_ELISION was not defined. * sysdeps/s390/configure: Regenerated. * sysdeps/s390/configure.ac: Remove references to enable_lock_elision.. * nptl/tst-mutex8.c: Deleted all #ifndef ENABLE_LOCK_ELISION from the test. * sysdeps/powerpc/powerpc32/sysdep.h: Deleted all ENABLE_LOCK_ELISION checks. * sysdeps/powerpc/powerpc64/sysdep.h: Likewise. * sysdeps/powerpc/sysdep.h: Likewise. * sysdeps/s390/nptl/bits/pthreadtypes-arch.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/elision-conf.h: Likewise. * sysdeps/unix/sysv/linux/s390/force-elision.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/Makefile: Remove references to enable-lock-elision. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
* plural.c: improve reproducibilityJuro Bystricky2017-11-301-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a subtle non-determinism when building glibc. This depends on whether the glibc is built using the distibuted file intl/plural.c or built using the generated file intl/plural.c. These two files (intl/plural.c generated vs. distributed) are slightly different, hence we may end up with slightly different libraries. Originally, having "bison" installed was optional. So if "bison" was not present, we always built libraries with the distributed plural.c. If bison was installed, we *** may have *** replaced the distributed file plural.c with a new plural.c generated from plural.y. if the timestamps triggered this rule: plural.c plural.y $(BISON) $(BISONFLAGS) $@ $^ Given that timestamps are not preserved in GIT repositories, the above rule is not reliable without explicitly touching plural.c or plural.y. In other words, the rule may or may not have fired. In summary: there are two distinct sources of non-determinism: 1. Having "bison" installed or not 2. Having "bison" installed but timestamps poorly defined. This patch fixes this by requiring "bison" being installed and by always generating intl/plural.c from intl/plural.y. (This is achieved by simply removing checked-in intl/plural.c) [BZ #22432] * configure.ac (BISON): Require to be present. * configure: Regenerated. * intl/Makefile (generated): Add plural.c. [$(BISON) != no]: Make code unconditional. (plural.c): Change rule to $(objpfx)plural.c. ($(objpfx)plural.o): Depend on $(objpfx)plural.c. * intl/plural.c: Remove. * manual/install.texi (Tools for Compilation): Document bison as required. * INSTALL: Regenerated.
* Fix botched up regeneration in the last commitSiddhesh Poyarekar2017-11-161-2/+3
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* Prefer https for Sourceware linksSiddhesh Poyarekar2017-11-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | Update all sourceware links to https. The website redirects everything to https anyway so let the web server do a bit less work. The only reference that remains unchanged is the one in the old ChangeLog, since it didn't seem worth changing it. * NEWS: Update sourceware link to https. * configure.ac: Likewise. * crypt/md5test-giant.c: Likewise. * dlfcn/bug-atexit1.c: Likewise. * dlfcn/bug-atexit2.c: Likewise. * localedata/README: Likewise. * malloc/tst-mallocfork.c: Likewise. * manual/install.texi: Likewise. * nptl/tst-pthread-getattr.c: Likewise. * stdio-common/tst-fgets.c: Likewise. * stdio-common/tst-fwrite.c: Likewise. * sunrpc/Makefile: Likewise. * sysdeps/arm/armv7/multiarch/memcpy_impl.S: Likewise. * wcsmbs/tst-mbrtowc2.c: Likewise. * configure: Regenerate. * INSTALL: Regenerate.
* Remove add-ons mechanism.Joseph Myers2017-10-051-17/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | glibc has an add-ons mechanism to allow additional software to be integrated into the glibc build. Such add-ons may be within the glibc source tree, or outside it at a path passed to the --enable-add-ons configure option. localedata and crypt were once add-ons, distributed in separate release tarballs, but long since stopped using that mechanism. Linuxthreads was always an add-on. Ports spent some time as an add-on with separate release tarballs, then was first moved into the glibc source tree, then had its sysdeps files moved into the main sysdeps hierarchy so the add-ons mechanism was no longer used. NPTL spent some time as an add-on in the main glibc tree before stopping using the add-on mechanism. libidn used to have separate release tarballs but no longer does so, but still uses the add-ons mechanism within the glibc source tree. Various other software has supported building with the add-ons mechanism at times in the past, but I don't think any is still widely used. Add-ons involve significant, little-used complexity in the glibc build system, and make it hard to understand what the space of possible glibc configurations is. This patch removes the add-ons mechanism. libidn is now built via the Subdirs mechanism to cause any configuration using sysdeps/unix/inet to build libidn; HAVE_LIBIDN (which effectively means shared libraries are available) is now defined via sysdeps/unix/inet/configure. Various references to add-ons around the source tree are removed (in the case of maint.texi, the example list of sysdeps directories is still very out of date). Externally maintained ports should now put their files in the normal sysdeps directory structure rather than being arranged as add-ons; they probably need to change e.g. elf.h anyway, rather than actually being able to work just as a drop-in subtree. Hurd libpthread should be arranged similarly to NPTL, so some files might go in a hurd-pthreads (or similar) top-level directory in glibc, while sysdeps files should go in the normal sysdeps directory structure (possibly in hurd or hurd-pthreads subdirectories, just as there are nptl subdirectories in the sysdeps tree). Tested for x86_64, and with build-many-glibcs.py. * configure.ac (--enable-add-ons): Remove option. (machine): Do not mention add-ons in comment. (LIBC_PRECONFIGURE): Likewise. (add_ons): Remove variable and sanity checks and logic to locate add-ons. (add_ons_automatic): Remove variable. (configured_add_ons): Likewise. (add_ons_sfx): Likewise. (add_ons_pfx): Likewise. (add_on_subdirs): Likewise. (sysnames_add_ons): Likewise. Remove loop over add-ons and consideration of add-ons in Implies handling. (sysdeps_add_ons): Likewise. * configure: Regenerated. * libidn/configure.ac: Remove. * libidn/configure: Likewise. * sysdeps/unix/inet/configure.ac: New file. * sysdeps/unix/inet/configure: New generated file. * sysdeps/unix/inet/Subdirs: Add libidn. * Makeconfig (sysdeps-srcdirs): Remove variable. (+sysdep_dirs): Do not include $(sysdeps-srcdirs). ($(common-objpfx)config.status): Do not depend on add-on files. ($(common-objpfx)shlib-versions.v.i): Do not mention add-ons in comment. (all-subdirs): Do not include $(add-on-subdirs). * Makefile (dist-prepare): Do not use $(sysdeps-add-ons). * config.make.in (add-ons): Remove variable. (add-on-subdirs): Likewise. (sysdeps-add-ons): Likewise. * manual/Makefile (add-chapters): Remove. ($(objpfx)texis): Do not depend on $(add-chapters). (nonexamples): Do not handle $(add-chapters). (examples): Do not handle $(add-ons). (chapters.% top-menu.%): Do not pass '$(add-chapters)' to libc-texinfo.sh. * manual/install.texi (Installation): Do not mention add-ons. (--enable-add-ons): Do not document configure option. * INSTALL: Regenerated. * manual/libc-texinfo.sh: Do not handle $2 add-ons argument. * manual/maint.texi (Hierarchy Conventions): Do not mention add-ons. * scripts/build-many-glibcs.py (Glibc.build_glibc): Do not use --enable-add-ons. * scripts/gen-sorted.awk: Do not handle Subdirs files from add-ons. * scripts/test-installation.pl: Do not handle glibc-compat add-on. * sysdeps/nptl/Makeconfig: Do not mention add-ons in comment.
* Update contributors and latest gcc and binutils versionsSiddhesh Poyarekar2017-08-021-2/+2
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* Add per-thread cache to mallocDJ Delorie2017-07-061-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * 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.
* Require binutils 2.25 or later to build glibc.Joseph Myers2017-06-281-1/+1
| | | | | | | | | | | | | | | | | | | | | | | 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.
* powerpc64le: Check for compiler features for float128Gabriel F. T. Gomes2017-06-261-0/+5
| | | | | | | | | | | | | | | On powerpc64le, support for float128 will be enabled, which requires some compiler features to be present. This patch adds a configure test to check for such features, which are provided for powerpc64le since GCC 6.2. Tested for powerpc64 and powerpc64le. * INSTALL: Regenerate. * manual/install.texi (Recommended Tools for Compilation): Mention the powerpc64le-specific requirement in the manual. * sysdeps/powerpc/powerpc64le/configure.ac: New file with checks for the compiler features required for building float128. * sysdeps/powerpc/powerpc64le/configure: New, auto-generated file.
* Require GCC 4.9 or later for building glibc.Joseph Myers2017-06-191-2/+2
| | | | | | | | | | | | | | | | | | | 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.
* Enable tunables by defaultSiddhesh Poyarekar2017-06-151-10/+8
| | | | | | | | | | | | | | | | | | | | 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.
* Assume that accept4 is always available and worksFlorian Weimer2017-04-191-7/+9
| | | | | | | | | | Simplify the Linux accept4 implementation based on the assumption that it is available in some way. __ASSUME_ACCEPT4_SOCKETCALL was previously unused, so remove it. For ia64, the accept4 system call (and socket call) were backported in kernel version 3.2.18. Reflect this in the installation instructions.
* Regenerate INSTALL.Joseph Myers2017-03-211-0/+6
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* Document and fix --enable-bind-now [BZ #21015]Florian Weimer2017-03-021-0/+6
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* Update install.texi latest GCC version known to work.Joseph Myers2017-01-181-1/+1
| | | | | | * manual/install.texi (Tools for Compilation): Update GCC version known to work to build glibc. * INSTALL: Regenerated.
* Enhance --enable-tunables to select tunables frontend at build timeSiddhesh Poyarekar2016-12-311-1/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* Add framework for tunablesSiddhesh Poyarekar2016-12-311-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* Configure support for --enable-stack-protector [BZ #7065]Nick Alcock2016-12-261-0/+11
| | | | | | | | | | | | | | | | | | 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.
* Add pretty printers for the NPTL lock typesMartin Galvan2016-12-081-0/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds pretty printers for the following NPTL types: - pthread_mutex_t - pthread_mutexattr_t - pthread_cond_t - pthread_condattr_t - pthread_rwlock_t - pthread_rwlockattr_t To load the pretty printers into your gdb session, do the following: python import sys sys.path.insert(0, '/path/to/glibc/build/nptl/pretty-printers') end source /path/to/glibc/source/pretty-printers/nptl-printers.py You can check which printers are registered and enabled by issuing the 'info pretty-printer' gdb command. Printers should trigger automatically when trying to print a variable of one of the types mentioned above. The printers are architecture-independent, and were tested on an AMD64 running Ubuntu 14.04 and an x86 VM running Fedora 24. In order to work, the printers need to know the values of various flags that are scattered throughout pthread.h and pthreadP.h as enums and #defines. Since replicating these constants in the printers file itself would create a maintenance burden, I wrote a script called gen-py-const.awk that Makerules uses to extract the constants. This script is pretty much the same as gen-as-const.awk, except it doesn't cast the constant values to 'long' and is thorougly documented. The constants need only to be enumerated in a .pysym file, which is then referenced by a Make variable called gen-py-const-headers. As for the install directory, I discussed this with Mike Frysinger and Siddhesh Poyarekar, and we agreed that it can be handled in a separate patch, and shouldn't block merging of this one. In addition, I've written a series of test cases for the pretty printers. Each lock type (mutex, condvar and rwlock) has two test programs, one for itself and other for its related 'attributes' object. Each test program in turn has a PExpect-based Python script that drives gdb and compares its output to the expected printer's. The tests run on the glibc host, which is assumed to have both gdb and PExpect; if either is absent the tests will fail with code 77 (UNSUPPORTED). For cross-testing you should use cross-test-ssh.sh as test-wrapper. I've tested the printers on both native builds and a cross build using a Beaglebone Black running Debian, with the build system's filesystem shared with the board through NFS. Finally, I've written a README that explains all this and more. * INSTALL: Regenerated. * Makeconfig: Add comments and whitespace to make the control flow clearer. (+link-printers-tests, +link-pie-printers-tests, CFLAGS-printers-tests, installed-rtld-LDFLAGS, built-rtld-LDFLAGS, link-libc-rpath, link-libc-tests-after-rpath-link, link-libc-printers-tests): New. (rtld-LDFLAGS, rtld-tests-LDFLAGS, link-libc-tests-rpath-link, link-libc-tests): Use the new variables as required. * Makerules ($(py-const)): New rule. generated: Add $(py-const). * README.pretty-printers: New file. * Rules (tests-printers-programs, tests-printers-out, py-env): New. (others): Depend on $(py-const). (tests): Depend on $(tests-printers-programs) or $(tests-printers-out), as required. Pass $(tests-printers) to merge-test-results.sh. * manual/install.texi: Add requirements for testing the pretty printers. * nptl/Makefile (gen-py-const-headers, pretty-printers, tests-printers, CFLAGS-test-mutexattr-printers.c CFLAGS-test-mutex-printers.c, CFLAGS-test-condattr-printers.c, CFLAGS-test-cond-printers.c, CFLAGS-test-rwlockattr-printers.c CFLAGS-test-rwlock-printers.c, tests-printers-libs): Define. * nptl/nptl-printers.py: New file. * nptl/nptl_lock_constants.pysym: Likewise. * nptl/test-cond-printers.c: Likewise. * nptl/test-cond-printers.py: Likewise. * nptl/test-condattr-printers.c: Likewise. * nptl/test-condattr-printers.py: Likewise. * nptl/test-mutex-printers.c: Likewise. * nptl/test-mutex-printers.py: Likewise. * nptl/test-mutexattr-printers.c: Likewise. * nptl/test-mutexattr-printers.py: Likewise. * nptl/test-rwlock-printers.c: Likewise. * nptl/test-rwlock-printers.py: Likewise. * nptl/test-rwlockattr-printers.c: Likewise. * nptl/test-rwlockattr-printers.py: Likewise. * scripts/gen-py-const.awk: Likewise. * scripts/test_printers_common.py: Likewise. * scripts/test_printers_exceptions.py: Likewise.
* Add configure check to test if gcc supports attribute ifunc.Stefan Liebler2016-10-071-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
* Manual typos: InstallingRical Jasan2016-10-061-4/+4
| | | | | | | 2016-05-06 Rical Jasan <ricaljasan@pacific.net> * manual/install.texi: Fix typos in the manual. * INSTALL: Regenerated.
* 2016-06-05 Paul Pluzhnikov <ppluzhnikov@google.com>Paul Pluzhnikov2016-06-051-6/+0
| | | | | * manual/install.texi: Remove mention of --without-tls * INSTALL: Regenerate.
* Require Linux 3.2 except on x86 / x86_64, 3.2 headers everywhere.Joseph Myers2016-02-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In <https://sourceware.org/ml/libc-alpha/2016-01/msg00885.html> I proposed a minimum Linux kernel version of 3.2 for glibc 2.24, since Linux 2.6.32 has reached EOL. In the discussion in February, some concerns were expressed about compatibility with OpenVZ containers. It's not clear that these are real issues, given OpenVZ backporting kernel features and faking the kernel version for guest software, as discussed in <https://sourceware.org/ml/libc-alpha/2016-02/msg00278.html>. It's also not clear that supporting running GNU/Linux distributions from late 2016 (at the earliest) on a kernel series from 2009 is a sensible expectation. However, as an interim step, this patch increases the requirement everywhere except x86 / x86_64 (since the controversy was only about those architectures); the special caveats and settings can easily be removed later when we're ready to increase the requirements on x86 / x86_64 (and if someone would like to raise the issue on LWN as suggested in the previous discussion, that would be welcome). 3.2 kernel headers are required everywhere by this patch. (x32 already requires 3.4 or later, so is unaffected by this patch.) As usual for such a change, this patch only changes the configure scripts and associated documentation. The intent is to follow up with removal of dead __LINUX_KERNEL_VERSION conditionals. Each __ASSUME_* or other macro that becomes dead can then be removed independently. Tested for x86_64 and x86. * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Define to 3.2.0. (arch_minimum_kernel): Likewise. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/i386/configure.ac (arch_minimum_kernel): Define to 2.6.32. * sysdeps/unix/sysv/linux/i386/configure: Regenerated. * sysdeps/unix/sysv/linux/x86_64/64/configure.ac (arch_minimum_kernel): Define to 2.6.32. * sysdeps/unix/sysv/linux/x86_64/64/configure: Regenerated. * README: Document Linux 3.2 requirement. * manual/install.texi (Linux): Document Linux 3.2 headers requirement. * INSTALL: Regenerated.
* Update INSTALL with latest versions tested to work.Carlos O'Donell2016-02-141-8/+7
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* Require GCC 4.7 or later to build glibc.Joseph Myers2015-10-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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.
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