mirror of
https://github.com/BLAKE2/libb2
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61 lines
1.9 KiB
Plaintext
61 lines
1.9 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_forceinline.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_FORCEINLINE()
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#
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# DESCRIPTION
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#
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# Provides a test for C compiler support of forced inlining. If usable,
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# #define FORCEINLINE to the appropriate force inline keyword. Otherwise
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# #define FORCEINLINE to be 'inline'.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Alan Woodland <ajw05@aber.ac.uk>
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# Copyright (c) 2009 Rhys Ulerich <rhys.ulerich@gmail.com>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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#serial 2
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AC_DEFUN([AX_FORCEINLINE], [
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AC_LANG_PUSH([C])
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AC_MSG_CHECKING(for forced inline keyword)
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AC_CACHE_VAL(ac_cv_forceinline, [
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ax_forceinline_keywords="__forceinline inline none"
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for ax_forceinline_keyword in $ax_forceinline_keywords; do
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case $ax_forceinline_keyword in
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none) ac_cv_forceinline=none ; break ;;
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*)
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AC_TRY_COMPILE(
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[#include <stdlib.h>
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] $ax_forceinline_keyword [
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static void
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foo(void) {
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exit(1);
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}],
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[],
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[ac_cv_forceinline=$ax_forceinline_keyword ; break],
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ac_cv_forceinline=none
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)
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esac
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done
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])
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if test "$ac_cv_forceinline" = "none"; then
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ax_forceinline_keyword=
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else
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ax_forceinline_keyword=$ac_cv_forceinline
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fi
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AC_DEFINE_UNQUOTED([FORCEINLINE],$ax_forceinline_keyword,
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[The most forceful inline keyword known by the compiler])
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AC_MSG_RESULT($ac_cv_forceinline)
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AC_LANG_POP([C])
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])
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