Feature flags possible to add in project.json. See #991

resources/testproject/hello_world.c3

@@ -11,5 +11,7 @@ fn int main()
     printf("Hello World!\n");
     bar::test();
     printf("Hello double: %d\n", test_doubler(11));
+	if ($feature(ABCD)) io::printn("ABCD");
+
     return 0;
 }

resources/testproject/project.json

@@ -14,6 +14,8 @@
   // libraries to use
   "dependencies": [],
 
+  "features": ["ABCD"],
+
   // c compiler
   "cc": "cc",
   // c sources

src/build/project.c

@@ -41,6 +41,7 @@ const char *project_default_keys[] = {
 		"winsdk",
 		"x86-stack-struct-return",
 		"x86vec",
+		"features"
 };
 
 const int project_default_keys_count = sizeof(project_default_keys) / sizeof(char*);
@@ -86,6 +87,7 @@ const char* project_target_keys[] = {
 		"winsdk",
 		"x86-stack-struct-return",
 		"x86vec",
+		"features",
 };
 
 const int project_target_keys_count = sizeof(project_target_keys) / sizeof(char*);
@@ -357,6 +359,18 @@ static void load_into_build_target(JSONObject *json, const char *type, BuildTarg
 	int fpmath = get_valid_string_setting(json, "fp-math", type, fp_math, 0, 3, "strict, relaxed, fast");
 	if (fpmath > -1) target->feature.fp_math = fpmath;
 
+	const char **features = get_valid_array(json, "features", type, false);
+	if (features)
+	{
+		FOREACH_BEGIN(const char *feature, features)
+			if (!str_is_valid_constant(feature))
+			{
+				error_exit("Error reading 'features': '%s' is not a valid feature name.", feature);
+			}
+			vec_add(target->feature_list, feature);
+		FOREACH_END();
+	}
+
 	// x86vec
 	int x86vec = get_valid_string_setting(json, "x86vec", type, x86_vector_capability, 0, 6, "none, native, mmx, sse, avx or avx512");
 	if (x86vec > -1) target->feature.x86_vector_capability = x86vec;

src/version.h

@@ -1 +1 @@
-#define COMPILER_VERSION "0.4.645"
+#define COMPILER_VERSION "0.4.646"