Add simplistic reimplementation of strcasestr to compat library

While all systems that I have access to support strcasestr, it is
in fact not part of POSIX. So here's a fallback reimplementation
based on POSIX functions.

Signed-off-by: Dirk Hohndel <hohndel@infradead.org>

Tested-by: Tomas Carnecky <tom@dbservice.com> (on OpenSolaris snv_134)

1 files changed, 10 insertions, 0 deletions

diff --git a/compat/have_strcasestr.c b/compat/have_strcasestr.c
new file mode 100644
index 00000000..c0fb7629
--- /dev/null
+++ b/compat/have_strcasestr.c
@@ -0,0 +1,10 @@
+#define _GNU_SOURCE
+#include <strings.h>
+
+int main()
+{
+    char *found;
+    const char *haystack, *needle;
+
+    found = strcasestr(haystack, needle);
+}