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a451f14b PE |
1 | # c-strtod.m4 serial 12 |
2 | ||
3 | # Copyright (C) 2004-2006, 2009-2011 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 | ||
10 | AC_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 | ||
36 | AC_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 | AC_CHECK_FUNCS([strtod_l]) | |
43 | ||
44 | AC_REQUIRE([AC_C_INLINE]) | |
45 | : | |
46 | ]) | |
47 | ||
48 | AC_DEFUN([gl_C_STRTOLD], | |
49 | [ | |
50 | AC_LIBOBJ([c-strtold]) | |
51 | ||
52 | dnl Prerequisites of lib/c-strtold.c. | |
53 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
54 | AC_REQUIRE([gl_C99_STRTOLD]) | |
55 | AC_CHECK_FUNCS([strtold_l]) | |
56 | ||
57 | AC_REQUIRE([AC_C_INLINE]) | |
58 | : | |
59 | ]) |