-# c-strtod.m4 serial 3
+# c-strtod.m4 serial 12
-# Copyright (C) 2004 Free Software Foundation, Inc.
-
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2, or (at your option)
-# any later version.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software Foundation,
-# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+# Copyright (C) 2004-2006, 2009-2011 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
# Written by Paul Eggert.
+AC_DEFUN([gl_C99_STRTOLD],
+[
+ AC_CACHE_CHECK([whether strtold conforms to C99],
+ [gl_cv_func_c99_strtold],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[/* On HP-UX before 11.23, strtold returns a struct instead of
+ long double. Reject implementations like that, by requiring
+ compatibility with the C99 prototype. */
+ #include <stdlib.h>
+ static long double (*p) (char const *, char **) = strtold;
+ static long double
+ test (char const *nptr, char **endptr)
+ {
+ long double r;
+ r = strtold (nptr, endptr);
+ return r;
+ }]],
+ [[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
+ [gl_cv_func_c99_strtold=yes],
+ [gl_cv_func_c99_strtold=no])])
+ if test $gl_cv_func_c99_strtold = yes; then
+ AC_DEFINE([HAVE_C99_STRTOLD], [1], [Define to 1 if strtold conforms to C99.])
+ fi
+])
+
AC_DEFUN([gl_C_STRTOD],
[
+ AC_LIBOBJ([c-strtod])
+
dnl Prerequisites of lib/c-strtod.c.
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_FUNCS([strtod_l])
+
+ AC_REQUIRE([AC_C_INLINE])
:
])
AC_DEFUN([gl_C_STRTOLD],
[
+ AC_LIBOBJ([c-strtold])
+
dnl Prerequisites of lib/c-strtold.c.
- AC_REQUIRE([gl_C_STRTOD])
- AC_CHECK_DECLS_ONCE([strtold])
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_REQUIRE([gl_C99_STRTOLD])
+ AC_CHECK_FUNCS([strtold_l])
+
+ AC_REQUIRE([AC_C_INLINE])
+ :
])