gnu.cfg: Added nullpointer tests for getopt_long().

Author: orbitcowboy

test/cfg/gnu.c

@@ -24,6 +24,7 @@
 #endif
 #include <strings.h>
 #include <error.h>
+#include <getopt.h>
 
 void unreachableCode_error(void) // #11197
 {
@@ -33,6 +34,18 @@ void unreachableCode_error(void) // #11197
     int i;
 }
 
+int nullPointer_getopt_long(int argc, char **argv, const char *optstring,
+                            const struct option *longopts, int *longindex)
+{
+    // cppcheck-suppress nullPointer
+    (void) getopt_long(argc, argv, NULL, longopts, longindex);
+    // cppcheck-suppress nullPointer
+    (void) getopt_long(argc, argv, optstring, NULL, longindex);
+    // cppcheck-suppress nullPointer
+    (void) getopt_long(argc, NULL, optstring, longopts, longindex);
+    return getopt_long(argc, argv, optstring, longopts, longindex);
+}
+
 int nullPointer_getservent_r(struct servent *restrict result_buf, char *restrict buf, size_t buflen, struct servent **restrict result)
 {
     // cppcheck-suppress nullPointer