broken out of ../acinclude.m4

1 files changed, 125 insertions, 0 deletions

diff --git a/m4/strftime.m4 b/m4/strftime.m4
new file mode 100644
index 000000000..8b40a69b6
--- /dev/null
+++ b/m4/strftime.m4
@@ -0,0 +1,125 @@
+#serial 2
+
+dnl From Jim Meyering.
+dnl If you use this macro in a package, you should
+dnl add the following two lines to acconfig.h:
+dnl   /* Define to gnu_strftime if the replacement function should be used.  */
+dnl   #undef strftime
+dnl
+AC_DEFUN(jm_FUNC_GNU_STRFTIME,
+[AC_REQUIRE([AC_HEADER_TIME])dnl
+ AC_REQUIRE([AC_C_CONST])dnl
+ AC_REQUIRE([AC_HEADER_STDC])dnl
+ AC_CHECK_HEADERS(sys/time.h)
+ AC_CACHE_CHECK([for working GNU strftime], jm_cv_func_working_gnu_strftime,
+  [AC_TRY_RUN(
+changequote(<<, >>)dnl
+<< /* Ulrich Drepper provided parts of the test program.  */
+#if STDC_HEADERS
+# include <stdlib.h>
+#endif
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+
+static int
+compare (const char *fmt, const struct tm *tm, const char *expected)
+{
+  char buf[99];
+  strftime (buf, 99, fmt, tm);
+  if (strcmp (buf, expected))
+    {
+#ifdef SHOW_FAILURES
+      printf ("fmt: \"%s\", expected \"%s\", got \"%s\"\n",
+	      fmt, expected, buf);
+#endif
+      return 1;
+    }
+  return 0;
+}
+
+int
+main ()
+{
+  int n_fail = 0;
+  struct tm *tm;
+  time_t t = 738367; /* Fri Jan  9 13:06:07 1970 */
+  tm = gmtime (&t);
+
+  /* This is necessary to make strftime give consistent zone strings and
+     e.g., seconds since the epoch (%s).  */
+  putenv ("TZ=GMT");
+
+#undef CMP
+#define CMP(Fmt, Expected) n_fail += compare ((Fmt), tm, (Expected))
+
+  CMP ("%-m", "1");		/* GNU */
+  CMP ("%A", "Friday");
+  CMP ("%^A", "FRIDAY");	/* The ^ is a GNU extension.  */
+  CMP ("%B", "January");
+  CMP ("%^B", "JANUARY");
+  CMP ("%C", "19");		/* POSIX.2 */
+  CMP ("%D", "01/09/70");	/* POSIX.2 */
+  CMP ("%G", "1970");		/* GNU */
+  CMP ("%H", "13");
+  CMP ("%I", "01");
+  CMP ("%M", "06");
+  CMP ("%M", "06");
+  CMP ("%R", "13:06");		/* POSIX.2 */
+  CMP ("%S", "07");
+  CMP ("%T", "13:06:07");	/* POSIX.2 */
+  CMP ("%U", "01");
+  CMP ("%V", "02");
+  CMP ("%W", "01");
+  CMP ("%X", "13:06:07");
+  CMP ("%Y", "1970");
+  CMP ("%Z", "GMT");
+  CMP ("%_m", " 1");		/* GNU */
+  CMP ("%a", "Fri");
+  CMP ("%^a", "FRI");
+  CMP ("%b", "Jan");
+  CMP ("%^b", "JAN");
+  CMP ("%c", "Fri Jan  9 13:06:07 1970");
+  CMP ("%^c", "FRI JAN  9 13:06:07 1970");
+  CMP ("%d", "09");
+  CMP ("%e", " 9");		/* POSIX.2 */
+  CMP ("%g", "70");		/* GNU */
+  CMP ("%h", "Jan");		/* POSIX.2 */
+  CMP ("%^h", "JAN");
+  CMP ("%j", "009");
+  CMP ("%k", "13");		/* GNU */
+  CMP ("%l", " 1");		/* GNU */
+  CMP ("%m", "01");
+  CMP ("%n", "\n");		/* POSIX.2 */
+  CMP ("%p", "PM");
+  CMP ("%r", "01:06:07 PM");	/* POSIX.2 */
+  CMP ("%s", "738367");		/* GNU */
+  CMP ("%t", "\t");		/* POSIX.2 */
+  CMP ("%u", "5");		/* POSIX.2 */
+  CMP ("%w", "5");
+  CMP ("%x", "01/09/70");
+  CMP ("%y", "70");
+  CMP ("%z", "+0000");		/* GNU */
+
+  exit (n_fail ? 1 : 0);
+}
+	      >>,
+changequote([, ])dnl
+	     jm_cv_func_working_gnu_strftime=yes,
+             jm_cv_func_working_gnu_strftime=no,
+	     dnl When crosscompiling, assume strftime is missing or broken.
+	     jm_cv_func_working_gnu_strftime=no)
+  ])
+  if test $jm_cv_func_working_gnu_strftime = no; then
+    LIBOBJS="$LIBOBJS strftime.o"
+    AC_DEFINE_UNQUOTED(strftime, gnu_strftime)
+  fi
+])