+
+# Check for strptime {{{
+if test "x$GCC" = "xyes"
+then
+ SAVE_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Wall -Wextra -Werror"
+fi
+
+AC_CHECK_FUNCS(strptime, [have_strptime="yes"], [have_strptime="no"])
+if test "x$have_strptime" = "xyes"
+then
+ AC_CACHE_CHECK([whether strptime is exported by default],
+ [c_cv_have_strptime_default],
+ AC_COMPILE_IFELSE(
+AC_LANG_PROGRAM(
+[[
+AC_INCLUDES_DEFAULT
+#include <time.h>
+]],
+[[
+ struct tm stm;
+ (void) strptime ("2010-12-30%13:42:42", "%Y-%m-%dT%T", &stm);
+]]),
+ [c_cv_have_strptime_default="yes"],
+ [c_cv_have_strptime_default="no"]))
+fi
+if test "x$have_strptime" = "xyes" && test "x$c_cv_have_strptime_default" = "xno"
+then
+ AC_CACHE_CHECK([whether strptime needs standards mode],
+ [c_cv_have_strptime_standards],
+ AC_COMPILE_IFELSE(
+AC_LANG_PROGRAM(
+[[
+#ifndef _ISOC99_SOURCE
+# define _ISOC99_SOURCE 1
+#endif
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif
+#ifndef _XOPEN_SOURCE
+# define _XOPEN_SOURCE 500
+#endif
+AC_INCLUDES_DEFAULT
+#include <time.h>
+]],
+[[
+ struct tm stm;
+ (void) strptime ("2010-12-30%13:42:42", "%Y-%m-%dT%T", &stm);
+]]),
+ [c_cv_have_strptime_standards="yes"],
+ [c_cv_have_strptime_standards="no"]))
+
+ if test "x$c_cv_have_strptime_standards" = "xyes"
+ then
+ AC_DEFINE([STRPTIME_NEEDS_STANDARDS], 1, [Set to true if strptime is only exported in X/Open mode (GNU libc).])
+ else
+ have_strptime="no"
+ fi
+fi
+
+if test "x$GCC" = "xyes"
+then
+ CFLAGS="$SAVE_CFLAGS"
+fi
+
+# }}} Check for strptime
+