Edit
kc3-lang/libxkbcommon/m4
Ran Benita
- ax_gcc_builtin.m4
-
# =========================================================================== # http://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_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_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 # # Unsuppored 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 2 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_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_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()], [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]) ])