Commit | Line | Data |
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e65fc94b LC |
1 | dnl Reentrant time functions like localtime_r. |
2 | ||
61cd9dc9 LC |
3 | dnl Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, |
4 | dnl Inc. | |
e65fc94b LC |
5 | dnl This file is free software; the Free Software Foundation |
6 | dnl gives unlimited permission to copy and/or distribute it, | |
7 | dnl with or without modifications, as long as this notice is preserved. | |
8 | ||
9 | dnl Written by Paul Eggert. | |
10 | ||
11 | AC_DEFUN([gl_TIME_R], | |
12 | [ | |
13 | dnl Persuade glibc and Solaris <time.h> to declare localtime_r. | |
14 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | |
15 | ||
16 | AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) | |
17 | AC_REQUIRE([AC_C_RESTRICT]) | |
18 | ||
19 | AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature], | |
20 | [gl_cv_time_r_posix], | |
8912421c LC |
21 | [AC_COMPILE_IFELSE([AC_LANG_PROGRAM( |
22 | [[#include <time.h>]], | |
23 | [[/* We don't need to append 'restrict's to the argument types, | |
24 | even though the POSIX signature has the 'restrict's, | |
25 | since C99 says they can't affect type compatibility. */ | |
26 | struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r; | |
27 | if (ptr) return 0; | |
28 | /* Check the return type is a pointer. On HP-UX 10 it is 'int'. */ | |
29 | *localtime_r (0, 0);]])], | |
e65fc94b LC |
30 | [gl_cv_time_r_posix=yes], |
31 | [gl_cv_time_r_posix=no])]) | |
32 | if test $gl_cv_time_r_posix = yes; then | |
33 | REPLACE_LOCALTIME_R=0 | |
34 | else | |
35 | REPLACE_LOCALTIME_R=1 | |
36 | AC_LIBOBJ([time_r]) | |
37 | gl_PREREQ_TIME_R | |
38 | fi | |
39 | ]) | |
40 | ||
41 | # Prerequisites of lib/time_r.c. | |
42 | AC_DEFUN([gl_PREREQ_TIME_R], [ | |
43 | : | |
44 | ]) |