Commit | Line | Data |
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f64898ab | 1 | # c-strtod.m4 serial 15 |
a451f14b | 2 | |
ba318903 | 3 | # Copyright (C) 2004-2006, 2009-2014 Free Software Foundation, Inc. |
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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 | ||
8aeb5be9 | 36 | dnl Prerequisites of lib/c-strtod.c. |
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37 | AC_DEFUN([gl_C_STRTOD], |
38 | [ | |
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39 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
40 | AC_CHECK_FUNCS([strtod_l]) | |
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41 | ]) |
42 | ||
8aeb5be9 | 43 | dnl Prerequisites of lib/c-strtold.c. |
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44 | AC_DEFUN([gl_C_STRTOLD], |
45 | [ | |
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46 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
47 | AC_REQUIRE([gl_C99_STRTOLD]) | |
48 | AC_CHECK_FUNCS([strtold_l]) | |
a451f14b | 49 | ]) |