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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| # =========================================================================== | ||
| # 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_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 | ||
| # | ||
| # 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 6 | ||
|
|
||
| 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_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]) | ||
| ]) |
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