mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/kdave/btrfs-progs.git
synced 2024-12-03 00:54:17 +08:00
e1eddbeb4c
Move files from m4/ to config that is also used for build and we can reduce the number of toplevel directories. Signed-off-by: David Sterba <dsterba@suse.com>
185 lines
6.2 KiB
Plaintext
185 lines
6.2 KiB
Plaintext
# ===========================================================================
|
|
# https://www.gnu.org/software/autoconf-archive/ax_gcc_builtin.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_GCC_BUILTIN(BUILTIN)
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# This macro checks if the compiler supports one of GCC's built-in
|
|
# functions; many other compilers also provide those same built-ins.
|
|
#
|
|
# The BUILTIN parameter is the name of the built-in function.
|
|
#
|
|
# If BUILTIN is supported define HAVE_<BUILTIN>. Keep in mind that since
|
|
# builtins usually start with two underscores they will be copied over
|
|
# into the HAVE_<BUILTIN> definition (e.g. HAVE___BUILTIN_EXPECT for
|
|
# __builtin_expect()).
|
|
#
|
|
# The macro caches its result in the ax_cv_have_<BUILTIN> variable (e.g.
|
|
# ax_cv_have___builtin_expect).
|
|
#
|
|
# The macro currently supports the following built-in functions:
|
|
#
|
|
# __builtin_assume_aligned
|
|
# __builtin_bswap16
|
|
# __builtin_bswap32
|
|
# __builtin_bswap64
|
|
# __builtin_choose_expr
|
|
# __builtin___clear_cache
|
|
# __builtin_clrsb
|
|
# __builtin_clrsbl
|
|
# __builtin_clrsbll
|
|
# __builtin_clz
|
|
# __builtin_clzl
|
|
# __builtin_clzll
|
|
# __builtin_complex
|
|
# __builtin_constant_p
|
|
# __builtin_cpu_init
|
|
# __builtin_cpu_is
|
|
# __builtin_cpu_supports
|
|
# __builtin_ctz
|
|
# __builtin_ctzl
|
|
# __builtin_ctzll
|
|
# __builtin_expect
|
|
# __builtin_ffs
|
|
# __builtin_ffsl
|
|
# __builtin_ffsll
|
|
# __builtin_fpclassify
|
|
# __builtin_huge_val
|
|
# __builtin_huge_valf
|
|
# __builtin_huge_vall
|
|
# __builtin_inf
|
|
# __builtin_infd128
|
|
# __builtin_infd32
|
|
# __builtin_infd64
|
|
# __builtin_inff
|
|
# __builtin_infl
|
|
# __builtin_isinf_sign
|
|
# __builtin_nan
|
|
# __builtin_nand128
|
|
# __builtin_nand32
|
|
# __builtin_nand64
|
|
# __builtin_nanf
|
|
# __builtin_nanl
|
|
# __builtin_nans
|
|
# __builtin_nansf
|
|
# __builtin_nansl
|
|
# __builtin_object_size
|
|
# __builtin_parity
|
|
# __builtin_parityl
|
|
# __builtin_parityll
|
|
# __builtin_popcount
|
|
# __builtin_popcountl
|
|
# __builtin_popcountll
|
|
# __builtin_powi
|
|
# __builtin_powif
|
|
# __builtin_powil
|
|
# __builtin_prefetch
|
|
# __builtin_trap
|
|
# __builtin_types_compatible_p
|
|
# __builtin_unreachable
|
|
#
|
|
# New:
|
|
# __builtin_add_overflow
|
|
# __builtin_sub_overflow
|
|
# __builtin_mul_overflow
|
|
#
|
|
# Unsupported built-ins will be tested with an empty parameter set and the
|
|
# result of the check might be wrong or meaningless so use with care.
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2013 Gabriele Svelto <gabriele.svelto@gmail.com>
|
|
#
|
|
# Copying and distribution of this file, with or without modification, are
|
|
# permitted in any medium without royalty provided the copyright notice
|
|
# and this notice are preserved. This file is offered as-is, without any
|
|
# warranty.
|
|
|
|
#serial 7
|
|
|
|
AC_DEFUN([AX_GCC_BUILTIN], [
|
|
AS_VAR_PUSHDEF([ac_var], [ax_cv_have_$1])
|
|
|
|
AC_CACHE_CHECK([for $1], [ac_var], [
|
|
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [
|
|
m4_case([$1],
|
|
[__builtin_assume_aligned], [$1("", 0)],
|
|
[__builtin_bswap16], [$1(0)],
|
|
[__builtin_bswap32], [$1(0)],
|
|
[__builtin_bswap64], [$1(0)],
|
|
[__builtin_choose_expr], [$1(0, 0, 0)],
|
|
[__builtin___clear_cache], [$1("", "")],
|
|
[__builtin_clrsb], [$1(0)],
|
|
[__builtin_clrsbl], [$1(0)],
|
|
[__builtin_clrsbll], [$1(0)],
|
|
[__builtin_clz], [$1(0)],
|
|
[__builtin_clzl], [$1(0)],
|
|
[__builtin_clzll], [$1(0)],
|
|
[__builtin_complex], [$1(0.0, 0.0)],
|
|
[__builtin_constant_p], [$1(0)],
|
|
[__builtin_cpu_init], [$1()],
|
|
[__builtin_cpu_is], [$1("intel")],
|
|
[__builtin_cpu_supports], [$1("sse")],
|
|
[__builtin_ctz], [$1(0)],
|
|
[__builtin_ctzl], [$1(0)],
|
|
[__builtin_ctzll], [$1(0)],
|
|
[__builtin_expect], [$1(0, 0)],
|
|
[__builtin_ffs], [$1(0)],
|
|
[__builtin_ffsl], [$1(0)],
|
|
[__builtin_ffsll], [$1(0)],
|
|
[__builtin_fpclassify], [$1(0, 1, 2, 3, 4, 0.0)],
|
|
[__builtin_huge_val], [$1()],
|
|
[__builtin_huge_valf], [$1()],
|
|
[__builtin_huge_vall], [$1()],
|
|
[__builtin_inf], [$1()],
|
|
[__builtin_infd128], [$1()],
|
|
[__builtin_infd32], [$1()],
|
|
[__builtin_infd64], [$1()],
|
|
[__builtin_inff], [$1()],
|
|
[__builtin_infl], [$1()],
|
|
[__builtin_isinf_sign], [$1(0.0)],
|
|
[__builtin_nan], [$1("")],
|
|
[__builtin_nand128], [$1("")],
|
|
[__builtin_nand32], [$1("")],
|
|
[__builtin_nand64], [$1("")],
|
|
[__builtin_nanf], [$1("")],
|
|
[__builtin_nanl], [$1("")],
|
|
[__builtin_nans], [$1("")],
|
|
[__builtin_nansf], [$1("")],
|
|
[__builtin_nansl], [$1("")],
|
|
[__builtin_object_size], [$1("", 0)],
|
|
[__builtin_parity], [$1(0)],
|
|
[__builtin_parityl], [$1(0)],
|
|
[__builtin_parityll], [$1(0)],
|
|
[__builtin_popcount], [$1(0)],
|
|
[__builtin_popcountl], [$1(0)],
|
|
[__builtin_popcountll], [$1(0)],
|
|
[__builtin_powi], [$1(0, 0)],
|
|
[__builtin_powif], [$1(0, 0)],
|
|
[__builtin_powil], [$1(0, 0)],
|
|
[__builtin_prefetch], [$1("")],
|
|
[__builtin_trap], [$1()],
|
|
[__builtin_types_compatible_p], [$1(int, int)],
|
|
[__builtin_unreachable], [$1()],
|
|
[__builtin_add_overflow], [$1(0, 1, (int *)0)],
|
|
[__builtin_sub_overflow], [$1(0, 1, (int *)0)],
|
|
[__builtin_mul_overflow], [$1(0, 1, (int *)0)],
|
|
[m4_warn([syntax], [Unsupported built-in $1, the test may fail])
|
|
$1()]
|
|
)
|
|
])],
|
|
[AS_VAR_SET([ac_var], [yes])],
|
|
[AS_VAR_SET([ac_var], [no])])
|
|
])
|
|
|
|
AS_IF([test yes = AS_VAR_GET([ac_var])],
|
|
[AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_$1), 1,
|
|
[Define to 1 if the system has the `$1' built-in function])], [])
|
|
|
|
AS_VAR_POPDEF([ac_var])
|
|
])
|