summaryrefslogtreecommitdiffstats
path: root/gl/m4/c-strtod.m4
diff options
context:
space:
mode:
Diffstat (limited to 'gl/m4/c-strtod.m4')
-rw-r--r--gl/m4/c-strtod.m453
1 files changed, 53 insertions, 0 deletions
diff --git a/gl/m4/c-strtod.m4 b/gl/m4/c-strtod.m4
new file mode 100644
index 0000000..7f206c7
--- /dev/null
+++ b/gl/m4/c-strtod.m4
@@ -0,0 +1,53 @@
1# c-strtod.m4 serial 9
2
3# Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
4# This file is free software; the Free Software Foundation
5# gives unlimited permission to copy and/or distribute it,
6# with or without modifications, as long as this notice is preserved.
7
8# Written by Paul Eggert.
9
10AC_DEFUN([gl_C99_STRTOLD],
11[
12 AC_CACHE_CHECK([whether strtold conforms to C99],
13 [gl_cv_func_c99_strtold],
14 [AC_LINK_IFELSE(
15 [AC_LANG_PROGRAM(
16 [[/* On HP-UX before 11.23, strtold returns a struct instead of
17 long double. Reject implementations like that, by requiring
18 compatibility with the C99 prototype. */
19 #include <stdlib.h>
20 static long double (*p) (char const *, char **) = strtold;
21 static long double
22 test (char const *nptr, char **endptr)
23 {
24 long double r;
25 r = strtold (nptr, endptr);
26 return r;
27 }]],
28 [[return test ("1.0", NULL) != 1 || p ("1.0", NULL) != 1;]])],
29 [gl_cv_func_c99_strtold=yes],
30 [gl_cv_func_c99_strtold=no])])
31 if test $gl_cv_func_c99_strtold = yes; then
32 AC_DEFINE([HAVE_C99_STRTOLD], 1, [Define to 1 if strtold conforms to C99.])
33 fi
34])
35
36AC_DEFUN([gl_C_STRTOD],
37[
38 AC_LIBOBJ([c-strtod])
39
40 dnl Prerequisites of lib/c-strtod.c.
41 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
42 :
43])
44
45AC_DEFUN([gl_C_STRTOLD],
46[
47 AC_LIBOBJ([c-strtold])
48
49 dnl Prerequisites of lib/c-strtold.c.
50 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
51 AC_REQUIRE([gl_C99_STRTOLD])
52 :
53])