timegm: add portable implementation (Solaris support)

The timegm(3) function is a non-standard extension to libc which is
available in GNU libc and on some BSDs.  Although SunOS had this
function in its libc, Solaris (unfortunately) removed it.  This patch
implements a very simple version of timegm() which is good enough for
parse-time-string.c.

Signed-off-by: Vladimir Marek <vlmarek@volny.cz>

1 files changed, 7 insertions, 0 deletions

diff --git a/compat/have_timegm.c b/compat/have_timegm.c
new file mode 100644
index 00000000..b62b7937
--- /dev/null
+++ b/compat/have_timegm.c
@@ -0,0 +1,7 @@
+#include <time.h>
+#include "compat.h"
+
+int main()
+{
+    return (int) timegm((struct tm *)0);
+}