-# isinf.m4 serial 7
-dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
+# isinf.m4 serial 9
+dnl Copyright (C) 2007-2014 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare isinf.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
- AC_CHECK_DECLS([isinf], , , [[#include <math.h>]])
+ AC_CHECK_DECLS([isinf], , ,
+ [[#include <math.h>
+ #ifndef isinf
+ #error "isinf must be a macro, not a function"
+ #endif
+ ]])
if test "$ac_cv_have_decl_isinf" = yes; then
gl_CHECK_MATH_LIB([ISINF_LIBM], [x = isinf (x) + isinf ((float) x);])
if test "$ISINF_LIBM" != missing; then
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([gl_BIGENDIAN])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether isinf(long double) works], [gl_cv_func_isinfl_works],
[
result |= 2;
}
-#if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_))
+#if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
/* Representation of an 80-bit 'long double' as an initializer for a sequence
of 'unsigned int' words. */
# ifdef WORDS_BIGENDIAN