[00/21] Allow glibc to be built with _FORTIFY_SOURCE

Hello,

This patch series introduces a new "--enable-fortify-source" option to glibc
build. This option may either be set to a value between 1 and 3, or left empty
to let configure select the highest value available for the build system.

The first patch adds the new configure option, the second excludes the routines
that can't be built with the option enabled.

The next patches are fixing test and compilation errors that arose with
fortification enabled.

I couldn't test the patch series in all configuration possible on all arches
possible but I ran the following:

 - build-many-glibcs was executed on x86_64, for all arches/variants. This was
   mainly done to ensure that installed headers were not broken (as some
   patches are modifying system headers)
 - The new "enable-fortify-source" variant for BMG got executed on x86_64
 - make check and benchtests were executed on x86_64, i686, ppc64le, aarch64,
   s390x, with and without fortification enabled.

Fred.

---
Frédéric Bérat (21):
  Add --enable-fortify-source option
  Configure: regenerate for autoconf 2.71
  Exclude routines from fortification
  sysdeps/{i386,x86_64}/mempcpy_chk.S: fix linknamespace for
    __mempcpy_chk
  stdio-common: tests: Incorrect maxlen parameter for swprintf
  sysdeps: Ensure ieee128*_chk routines to be properly named
  string: Ensure *_chk routines have their hidden builtin definition
    available
  stdio: Ensure *_chk routines have their hidden builtin definition
    available
  asprintf_chk: Ensure compatibility for both s390x and ppc64le
  misc/sys/cdefs.h: Create FORTIFY redirects for internal calls
  wcsmbs/bits/wchar2{,-decl}.h: Clearly separate declaration from
    definitions
  wcsmbs/bits/wchar2{,-decl}.h: Avoid PLT entries with _FORTIFY_SOURCE
  posix/bits/unistd.h: Clearly separate declaration from definitions
  posix/bits/unistd{,-decl}.h: Avoid PLT entries with _FORTIFY_SOURCE
  debug/readlink{,at}_chk.c: Harmonize declaration and definition
  misc/bits/select2.h: Clearly separate declaration from definitions
  misc/bits/syslog.h: Clearly separate declaration from definition
  rt/tst-mqueue4.c: Fix wrong number of argument for mq_open
  sysdeps/ieee754/ldbl-128ibm-compat: Fix warn unused result
  sysdeps/powerpc/fpu/tst-setcontext-fpscr.c: Fix warn unused result
  benchtests: fix warn unused result

 Makeconfig                                    |   33 +-
 aclocal.m4                                    |    2 +-
 benchtests/bench-strcoll.c                    |    6 +-
 config.make.in                                |    3 +-
 configure                                     | 4208 +++++++++++------
 configure.ac                                  |   70 +-
 debug/Makefile                                |   12 +-
 debug/asprintf_chk.c                          |   16 +-
 debug/fdelt_chk.c                             |    2 +
 debug/fgets_u_chk.c                           |    1 +
 debug/fprintf_chk.c                           |    1 +
 debug/getdomainname_chk.c                     |    1 +
 debug/memcpy_chk.c                            |    1 +
 debug/memmove_chk.c                           |    1 +
 debug/mempcpy_chk.c                           |    1 +
 debug/memset_chk.c                            |    1 +
 debug/read_chk.c                              |    1 +
 debug/readlink_chk.c                          |    3 +-
 debug/readlinkat_chk.c                        |    3 +-
 debug/sprintf_chk.c                           |    1 +
 debug/stpcpy_chk.c                            |    1 +
 debug/wcrtomb_chk.c                           |    1 +
 debug/wmemset_chk.c                           |    1 +
 elf/rtld-Rules                                |    2 +-
 include/bits/select-decl.h                    |    1 +
 include/bits/syslog-decl.h                    |    1 +
 include/bits/unistd-decl.h                    |    1 +
 include/stdio.h                               |   13 +-
 include/string.h                              |    7 +
 include/sys/cdefs.h                           |   14 +
 include/sys/select.h                          |    4 +
 include/sys/syslog.h                          |    4 +
 include/unistd.h                              |    5 +
 include/wchar.h                               |   16 +
 io/Makefile                                   |   16 +
 libio/Makefile                                |   21 +-
 login/Makefile                                |    6 +
 login/getlogin_r_chk.c                        |    1 +
 misc/Makefile                                 |    9 +
 misc/bits/select-decl.h                       |   31 +
 misc/bits/select2.h                           |    6 +-
 misc/bits/syslog-decl.h                       |   35 +
 misc/bits/syslog.h                            |   10 +-
 misc/sys/cdefs.h                              |    8 +
 misc/syslog.c                                 |    4 +-
 posix/Makefile                                |   12 +
 posix/bits/unistd-decl.h                      |  198 +
 posix/bits/unistd.h                           |  154 +-
 rt/Makefile                                   |    5 +
 rt/tst-mqueue4.c                              |    4 +-
 setjmp/Makefile                               |    5 +
 socket/Makefile                               |    6 +
 stdio-common/Makefile                         |   15 +-
 stdio-common/tst-printf-bz25691.c             |    8 +-
 stdio-common/tst-vfprintf-mbs-prec.c          |   15 +-
 stdlib/Makefile                               |    7 +
 string/Makefile                               |   17 +
 sysdeps/generic/libc-symver.h                 |    2 +-
 sysdeps/i386/i586/memcpy.S                    |    1 +
 sysdeps/i386/i586/memset.S                    |    1 +
 sysdeps/i386/i686/memcpy.S                    |    1 +
 sysdeps/i386/i686/memmove.S                   |    1 +
 sysdeps/i386/i686/mempcpy.S                   |    1 +
 sysdeps/i386/i686/memset.S                    |    1 +
 sysdeps/i386/i686/multiarch/memcpy_chk.c      |    4 +
 sysdeps/i386/i686/multiarch/memmove_chk.c     |    4 +
 sysdeps/i386/i686/multiarch/mempcpy_chk.c     |    4 +
 sysdeps/i386/i686/multiarch/memset_chk.c      |    5 +-
 sysdeps/i386/memcpy_chk.S                     |    1 +
 sysdeps/i386/memmove_chk.S                    |    1 +
 sysdeps/i386/mempcpy_chk.S                    |    3 +-
 sysdeps/i386/memset_chk.S                     |    1 +
 sysdeps/ieee754/ldbl-128ibm-compat/Makefile   |   81 +-
 .../ldbl-128ibm-compat/ieee128-asprintf_chk.c |    5 +-
 .../ldbl-128ibm-compat/ieee128-dprintf_chk.c  |    4 +-
 .../ldbl-128ibm-compat/ieee128-fprintf_chk.c  |    5 +-
 .../ldbl-128ibm-compat/ieee128-fwprintf_chk.c |    5 +-
 .../ldbl-128ibm-compat/ieee128-printf_chk.c   |    4 +-
 .../ldbl-128ibm-compat/ieee128-snprintf_chk.c |    4 +-
 .../ldbl-128ibm-compat/ieee128-sprintf_chk.c  |    5 +-
 .../ldbl-128ibm-compat/ieee128-swprintf_chk.c |    4 +-
 .../ldbl-128ibm-compat/ieee128-syslog.c       |    9 +-
 .../ieee128-vasprintf_chk.c                   |    4 +-
 .../ldbl-128ibm-compat/ieee128-vdprintf_chk.c |    4 +-
 .../ldbl-128ibm-compat/ieee128-vfprintf_chk.c |    4 +-
 .../ieee128-vfwprintf_chk.c                   |    4 +-
 .../ldbl-128ibm-compat/ieee128-vprintf_chk.c  |    4 +-
 .../ieee128-vsnprintf_chk.c                   |    4 +-
 .../ldbl-128ibm-compat/ieee128-vsprintf_chk.c |    5 +-
 .../ieee128-vswprintf_chk.c                   |    4 +-
 .../ldbl-128ibm-compat/ieee128-vwprintf_chk.c |    4 +-
 .../ldbl-128ibm-compat/ieee128-wprintf_chk.c  |    4 +-
 .../test-printf-ldbl-compat.c                 |   10 +-
 .../test-scanf-ldbl-compat-template.c         |   21 +-
 sysdeps/ieee754/ldbl-opt/Makefile             |   29 +
 sysdeps/powerpc/fpu/tst-setcontext-fpscr.c    |    4 +-
 sysdeps/pthread/Makefile                      |    4 +
 sysdeps/unix/sysv/linux/Makefile              |    3 +
 .../sysv/linux/s390/tst-ptrace-singleblock.c  |    3 +-
 sysdeps/x86_64/memcpy_chk.S                   |    1 +
 sysdeps/x86_64/memmove_chk.S                  |    1 +
 sysdeps/x86_64/mempcpy_chk.S                  |    3 +-
 sysdeps/x86_64/memset_chk.S                   |    1 +
 sysdeps/x86_64/multiarch/memcpy_chk.c         |    4 +
 sysdeps/x86_64/multiarch/memmove_chk.c        |    4 +
 sysdeps/x86_64/multiarch/mempcpy_chk.c        |    4 +
 sysdeps/x86_64/multiarch/memset_chk.c         |    4 +
 sysdeps/x86_64/multiarch/wmemset_chk.c        |    4 +
 wcsmbs/Makefile                               |   23 +-
 wcsmbs/bits/wchar2-decl.h                     |  172 +
 wcsmbs/bits/wchar2.h                          |  192 -
 111 files changed, 3765 insertions(+), 1951 deletions(-)
 create mode 100644 include/bits/select-decl.h
 create mode 100644 include/bits/syslog-decl.h
 create mode 100644 include/bits/unistd-decl.h
 create mode 100644 misc/bits/select-decl.h
 create mode 100644 misc/bits/syslog-decl.h
 create mode 100644 posix/bits/unistd-decl.h