26 lines
926 B
Text
26 lines
926 B
Text
# sys_cdefs_h.m4 - Is <sys/cdefs.h> compatible enough with glibc?
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# serial 2
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dnl Copyright 2024-2025 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This file is offered as-is, without any warranty.
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dnl Written by Paul Eggert.
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AC_DEFUN_ONCE([gl_CHECK_HEADER_SYS_CDEFS_H],
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[AC_CACHE_CHECK([for glibc-compatible sys/cdefs.h],
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[gl_cv_header_sys_cdefs_h],
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[AC_COMPILE_IFELSE(
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[AC_LANG_DEFINES_PROVIDED
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[#include <sys/cdefs.h>
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enum { foo = __GNUC_PREREQ (14, 1) } bar;
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]],
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[gl_cv_header_sys_cdefs_h=yes],
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[gl_cv_header_sys_cdefs_h=no])])
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if test "$gl_cv_header_sys_cdefs_h" = yes; then
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HAVE_SYS_CDEFS_H=1
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else
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HAVE_SYS_CDEFS_H=0
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fi
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AC_SUBST([HAVE_SYS_CDEFS_H])])
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