Auto generate compile_flags.txt for clang tools

gebs.h

@@ -272,6 +272,24 @@ void gebs_rebuild_self1_alloc(Gebs_Allocator *alloc, int argc, char ** argv,
     __ok; \
 })
 
+#define gebs_make_compile_flags(...) \
+    do { \
+        if (!gebs_exists("compile_flags.txt")) { \
+            GEBS_LOGI("Creating compile_flags.txt\n"); \
+            const char *__flags[] = { __VA_ARGS__ }; \
+            FILE *__out = fopen("compile_flags.txt", "w"); \
+            char __nl = '\n'; \
+            if (__out != NULL) { \
+                for (size_t __i = 0; __i < sizeof(__flags)/sizeof(__flags[0]); __i++) { \
+                    const char *__flag = __flags[__i]; \
+                    fwrite(__flag, strlen(__flag), 1, __out); \
+                    fwrite(&__nl, 1, 1, __out); \
+                } \
+                fclose(__out); \
+            } \
+        } \
+    } while(0)
+
 // ----------------------------------------------------------------------------
 // Scratch arena
 // ----------------------------------------------------------------------------