diff options
Diffstat (limited to 'gnulib/import/m4/time_r.m4')
| -rw-r--r-- | gnulib/import/m4/time_r.m4 | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/gnulib/import/m4/time_r.m4 b/gnulib/import/m4/time_r.m4 index 21b4a2c..cc4b3e0 100644 --- a/gnulib/import/m4/time_r.m4 +++ b/gnulib/import/m4/time_r.m4 @@ -1,6 +1,6 @@ dnl Reentrant time functions: localtime_r, gmtime_r. -dnl Copyright (C) 2003, 2006-2016 Free Software Foundation, Inc. +dnl Copyright (C) 2003, 2006-2019 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -17,7 +17,15 @@ AC_DEFUN([gl_TIME_R], dnl Some systems don't declare localtime_r() and gmtime_r() if _REENTRANT is dnl not defined. - AC_CHECK_DECLS([localtime_r], [], [], [[#include <time.h>]]) + AC_CHECK_DECLS([localtime_r], [], [], + [[/* mingw's <time.h> provides the functions asctime_r, ctime_r, + gmtime_r, localtime_r only if <unistd.h> or <pthread.h> has + been included before. */ + #if defined __MINGW32__ + # include <unistd.h> + #endif + #include <time.h> + ]]) if test $ac_cv_have_decl_localtime_r = no; then HAVE_DECL_LOCALTIME_R=0 fi @@ -29,7 +37,14 @@ AC_DEFUN([gl_TIME_R], [gl_cv_time_r_posix], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM( - [[#include <time.h>]], + [[/* mingw's <time.h> provides the functions asctime_r, ctime_r, + gmtime_r, localtime_r only if <unistd.h> or <pthread.h> has + been included before. */ + #if defined __MINGW32__ + # include <unistd.h> + #endif + #include <time.h> + ]], [[/* We don't need to append 'restrict's to the argument types, even though the POSIX signature has the 'restrict's, since C99 says they can't affect type compatibility. */ @@ -49,6 +64,32 @@ AC_DEFUN([gl_TIME_R], fi else HAVE_LOCALTIME_R=0 + dnl On mingw, localtime_r() is defined as an inline function; use through a + dnl direct function call works but the use as a function pointer leads to a + dnl link error. + AC_CACHE_CHECK([whether localtime_r exists as an inline function], + [gl_cv_func_localtime_r_inline], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[/* mingw's <time.h> provides the functions asctime_r, ctime_r, + gmtime_r, localtime_r only if <unistd.h> or <pthread.h> has + been included before. */ + #if defined __MINGW32__ + # include <unistd.h> + #endif + #include <time.h> + ]], + [[time_t a; + struct tm r; + localtime_r (&a, &r); + ]]) + ], + [gl_cv_func_localtime_r_inline=yes], + [gl_cv_func_localtime_r_inline=no]) + ]) + if test $gl_cv_func_localtime_r_inline = yes; then + REPLACE_LOCALTIME_R=1 + fi fi ]) |