HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | ]) |