[PATCH 00/11] Initial fixes for clang build support

[Adhemerval Zanella]

These are some patches requires to start the glibc build support by
clang, which are far from all required to have minimum support.  I am
also tracking the support on a personal branch [1].

[1] https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/azanella/clang

Adhemerval Zanella (9):
  Rewrite find_cxx_header config configure.ac
  linux: Move hidden_proto before static inline usage on not-cancel.h
  intl: Fix clang -Wunused-but-set-variable on plural.c
  Disable use of -fsignaling-nans if compiler does not support it
  stdlib: Move attribute_hidden definition to function prototype at
    gmp.h
  configure: Use -Wno-ignored-attributes if compiler warns about
    multiple aliases
  alloc_buffer: Apply asm redirection before first use
  allocate_once: Apply asm redirection before first use
  nptl: Fix pthread_create.c build with clang

Fangrui Song (2):
  stdlib/longlong.h: Remove incorrect lvalue to rvalue conversion from
    asm output constraints
  Disable __USE_EXTERN_INLINES for clang

 argp/Makefile                                 |   7 +-
 benchtests/Makefile                           |   6 +-
 configure                                     |  55 +++++-
 configure.ac                                  |  36 +++-
 dirent/Makefile                               |   1 +
 include/alloc_buffer.h                        |  23 ++-
 include/allocate_once.h                       |   7 +-
 include/features.h                            |   2 +-
 include/gmp.h                                 |  12 --
 inet/Makefile                                 |   3 +
 intl/Makefile                                 |   3 +-
 io/Makefile                                   |  18 +-
 libio/Makefile                                |  14 +-
 login/Makefile                                |   1 +
 math/Makefile                                 |  19 +-
 math/libm-test-fpclassify.inc                 |   2 +
 math/libm-test-isfinite.inc                   |   2 +
 math/libm-test-isinf.inc                      |   2 +
 math/libm-test-isnan.inc                      |   2 +
 math/libm-test-isnormal.inc                   |   2 +
 math/libm-test-issubnormal.inc                |   2 +
 math/libm-test-iszero.inc                     |   2 +
 math/test-snan.c                              |  10 +-
 misc/Makefile                                 |   2 +
 nptl/pthread_create.c                         |   6 +-
 posix/Makefile                                |   6 +-
 resolv/Makefile                               |   1 +
 resource/Makefile                             |   3 +
 socket/Makefile                               |  10 +-
 stdio-common/Makefile                         |   2 +
 stdlib/Makefile                               |  12 ++
 stdlib/gmp.h                                  |  72 +++----
 stdlib/longlong.h                             | 186 +++++++++---------
 string/Makefile                               |   9 +
 sysdeps/aarch64/Makefile                      |   1 +
 sysdeps/arm/Makefile                          |   4 +
 sysdeps/powerpc/nofpu/Makefile                |  24 +--
 .../powerpc32/power4/fpu/multiarch/Makefile   |   4 +-
 .../powerpc64/be/fpu/multiarch/Makefile       |   4 +-
 .../powerpc64/le/fpu/multiarch/Makefile       |   4 +-
 sysdeps/unix/sysv/linux/not-cancel.h          |  30 +--
 sysdeps/wordsize-64/Makefile                  |   5 +
 termios/Makefile                              |   1 +
 time/Makefile                                 |   1 +
 wcsmbs/Makefile                               |  24 ++-
 wctype/Makefile                               |   2 +
 46 files changed, 410 insertions(+), 234 deletions(-)

-- 
2.34.1