MacOS Build (#75)

* Wrapped Linux-specific linker option with an OS check.

* Build: Fix AppleClang condition

Author: Treata11

CMakeLists.txt

@@ -177,7 +177,12 @@ if(CMAKE_COMPILER_IS_GNUCC AND
    CMAKE_C_COMPILER_VERSION VERSION_LESS 9)
     target_compile_options(${PROJECT_NAME}_objlib PRIVATE -mmitigate-rop)
 endif()
-set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -z noexecstack -z relro -z now")
+
+if(CMAKE_C_COMPILER_ID MATCHES "AppleClang")
+  # Left empty since macOS will handle linking appropriately with defaults.
+else()
+  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -z noexecstack -z relro -z now")
+endif()
 
 option(BUILD_ERROR_ON_WARNING "Fail compilation on warning" OFF)