diff options
Diffstat (limited to 'gl/m4/time_r.m4')
| -rw-r--r-- | gl/m4/time_r.m4 | 49 |
1 files changed, 30 insertions, 19 deletions
diff --git a/gl/m4/time_r.m4 b/gl/m4/time_r.m4 index c871b56..9e82d39 100644 --- a/gl/m4/time_r.m4 +++ b/gl/m4/time_r.m4 | |||
| @@ -1,6 +1,6 @@ | |||
| 1 | dnl Reentrant time functions like localtime_r. | 1 | dnl Reentrant time functions: localtime_r, gmtime_r. |
| 2 | 2 | ||
| 3 | dnl Copyright (C) 2003, 2006, 2007, 2008 Free Software Foundation, Inc. | 3 | dnl Copyright (C) 2003, 2006-2010 Free Software Foundation, Inc. |
| 4 | dnl This file is free software; the Free Software Foundation | 4 | dnl This file is free software; the Free Software Foundation |
| 5 | dnl gives unlimited permission to copy and/or distribute it, | 5 | dnl gives unlimited permission to copy and/or distribute it, |
| 6 | dnl with or without modifications, as long as this notice is preserved. | 6 | dnl with or without modifications, as long as this notice is preserved. |
| @@ -9,29 +9,40 @@ dnl Written by Paul Eggert. | |||
| 9 | 9 | ||
| 10 | AC_DEFUN([gl_TIME_R], | 10 | AC_DEFUN([gl_TIME_R], |
| 11 | [ | 11 | [ |
| 12 | dnl Persuade glibc and Solaris <time.h> to declare localtime_r. | 12 | dnl Persuade glibc and Solaris <time.h> to declare localtime_r. |
| 13 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) | 13 | AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) |
| 14 | 14 | ||
| 15 | AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) | 15 | AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS]) |
| 16 | AC_REQUIRE([AC_C_RESTRICT]) | 16 | AC_REQUIRE([AC_C_RESTRICT]) |
| 17 | 17 | ||
| 18 | AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature], | 18 | AC_CHECK_FUNCS_ONCE([localtime_r]) |
| 19 | [gl_cv_time_r_posix], | 19 | if test $ac_cv_func_localtime_r = yes; then |
| 20 | [AC_TRY_COMPILE( | 20 | AC_CACHE_CHECK([whether localtime_r is compatible with its POSIX signature], |
| 21 | [#include <time.h>], | 21 | [gl_cv_time_r_posix], |
| 22 | [/* We don't need to append 'restrict's to the argument types, | 22 | [AC_COMPILE_IFELSE( |
| 23 | even though the POSIX signature has the 'restrict's, | 23 | [AC_LANG_PROGRAM( |
| 24 | since C99 says they can't affect type compatibility. */ | 24 | [[#include <time.h>]], |
| 25 | struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r; | 25 | [[/* We don't need to append 'restrict's to the argument types, |
| 26 | if (ptr) return 0; | 26 | even though the POSIX signature has the 'restrict's, |
| 27 | /* Check the return type is a pointer. On HP-UX 10 it is 'int'. */ | 27 | since C99 says they can't affect type compatibility. */ |
| 28 | *localtime_r (0, 0);], | 28 | struct tm * (*ptr) (time_t const *, struct tm *) = localtime_r; |
| 29 | [gl_cv_time_r_posix=yes], | 29 | if (ptr) return 0; |
| 30 | [gl_cv_time_r_posix=no])]) | 30 | /* Check the return type is a pointer. |
| 31 | if test $gl_cv_time_r_posix = yes; then | 31 | On HP-UX 10 it is 'int'. */ |
| 32 | REPLACE_LOCALTIME_R=0 | 32 | *localtime_r (0, 0);]]) |
| 33 | ], | ||
| 34 | [gl_cv_time_r_posix=yes], | ||
| 35 | [gl_cv_time_r_posix=no]) | ||
| 36 | ]) | ||
| 37 | if test $gl_cv_time_r_posix = yes; then | ||
| 38 | REPLACE_LOCALTIME_R=0 | ||
| 39 | else | ||
| 40 | REPLACE_LOCALTIME_R=1 | ||
| 41 | fi | ||
| 33 | else | 42 | else |
| 34 | REPLACE_LOCALTIME_R=1 | 43 | HAVE_LOCALTIME_R=0 |
| 44 | fi | ||
| 45 | if test $HAVE_LOCALTIME_R = 0 || test $REPLACE_LOCALTIME_R = 1; then | ||
| 35 | AC_LIBOBJ([time_r]) | 46 | AC_LIBOBJ([time_r]) |
| 36 | gl_PREREQ_TIME_R | 47 | gl_PREREQ_TIME_R |
| 37 | fi | 48 | fi |