[ci] add CI

test/generate_warnings.c

@@ -0,0 +1,20 @@
+#include <limits.h>
+
+int bad_code(float n) {
+
+    int small[3];
+
+    char index = 10;
+
+    int x = small[index];
+
+    double promoted = 3.14159 * n * n;
+
+    return bad_code(x);
+}
+
+
+int main() {
+
+    printf("%s %s", bad_code(1.0f));
+}