Commit 41af9a77 authored by Niels Möller's avatar Niels Möller

Check for gcc:s __attribute__.

Rev: src/nettle/configure.ac:1.15
parent 0b25e96e
dnl -*- mode: shell-script; sh-indentation: 2; -*-
dnl $Id$
dnl Process this file with autoconf to produce a configure script.
......@@ -130,6 +129,42 @@ AC_C_BIGENDIAN
AC_REPLACE_FUNCS(memxor)
# Check for gcc's __attribute__ construction
AC_CACHE_CHECK(for __attribute__,
lsh_cv_c_attribute,
[ AC_TRY_COMPILE([
#include <stdlib.h>
],
[
static void foo(void) __attribute__ ((noreturn));
static void __attribute__ ((noreturn))
foo(void)
{
exit(1);
}
],
lsh_cv_c_attribute=yes,
lsh_cv_c_attribute=no)])
AH_TEMPLATE([HAVE_GCC_ATTRIBUTE],
[Define if the compiler understands __attribute__])
if test "x$lsh_cv_c_attribute" = "xyes"; then
AC_DEFINE(HAVE_GCC_ATTRIBUTE)
fi
AH_BOTTOM(
[#if __GNUC__ && HAVE_GCC_ATTRIBUTE
# define NORETURN __attribute__ ((__noreturn__))
# define PRINTF_STYLE(f, a) __attribute__ ((__format__ (__printf__, f, a)))
# define UNUSED __attribute__ ((__unused__))
#else
# define NORETURN
# define PRINTF_STYLE(f, a)
# define UNUSED
#endif
])
# Checks for libraries
AC_CHECK_LIB(gmp, __gmpz_getlimbn,,
[AC_MSG_WARN(
......
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