MacOS compatibility changes + file permissions

- File and directory permissions changed to 755 and 644
- Simpler extension loading with dlsym() on MacOS

download.go

@@ -40,11 +40,11 @@ func DownloadFile(baseURL, fileName, outDir string) error {
 	if err != nil {
 		return err
 	}
-	err = os.MkdirAll(absPath, 0666)
+	err = os.MkdirAll(absPath, 0755)
 	if err != nil {
 		return err
 	}
-	err = ioutil.WriteFile(filepath.Join(absPath, fileName), data, 0666)
+	err = ioutil.WriteFile(filepath.Join(absPath, fileName), data, 0644)
 	if err != nil {
 		return err
 	}

generator.go

@@ -69,8 +69,7 @@ func writePackage(w io.Writer, packageName string, pak *Package, functsInfo *Fun
 
 	fmt.Fprintf(w, "// #include <stdlib.h>\n")
 	fmt.Fprintf(w, "// #if defined(__APPLE__)\n")
-	fmt.Fprintf(w, "// #include <mach-o/dyld.h>\n")
-	fmt.Fprintf(w, "// #include <string.h>\n")
+	fmt.Fprintf(w, "// #include <dlfcn.h>\n")
 	fmt.Fprintf(w, "// #elif defined(_WIN32)\n")
 	fmt.Fprintf(w, "// #define WIN32_LEAN_AND_MEAN 1\n")
 	fmt.Fprintf(w, "// #include <windows.h>\n")
@@ -116,18 +115,7 @@ func writePackage(w io.Writer, packageName string, pak *Package, functsInfo *Fun
 
 	fmt.Fprintf(w, "// void* goglGetProcAddress(const char* name) { \n")
 	fmt.Fprintf(w, "// #ifdef __APPLE__\n")
-	fmt.Fprintf(w, "// 	NSSymbol symbol;\n")
-	fmt.Fprintf(w, "// 	char symbolname[1024];\n")
-	fmt.Fprintf(w, "// 	symbolname[0] = '_';\n")
-	fmt.Fprintf(w, "// 	strcpy(symbolname + 1, name);\n")
-	fmt.Fprintf(w, "// 	symbol = NULL;\n")
-	fmt.Fprintf(w, "// 	if(NSIsSymbolNameDefined(symbolname)) {\n")
-	fmt.Fprintf(w, "// 		symbol = NSLookupAndBindSymbol(symbolname);\n")
-	fmt.Fprintf(w, "// 		if (symbol) {\n")
-	fmt.Fprintf(w, "// 			return NSAddressOfSymbol(symbol);\n")
-	fmt.Fprintf(w, "// 		}\n")
-	fmt.Fprintf(w, "// 	}\n")
-	fmt.Fprintf(w, "// 	return NULL;\n")
+	fmt.Fprintf(w, "// 	return dlsym(RTLD_DEFAULT, name);\n")
 	fmt.Fprintf(w, "// #elif _WIN32\n")
 	fmt.Fprintf(w, "// 	void* pf = wglGetProcAddress((LPCSTR)name);\n")
 	fmt.Fprintf(w, "// 	if(pf) {\n")