fix mac build

Author: onecoolx

build/configs.cmake

@@ -29,15 +29,18 @@ elseif (UNIX AND NOT APPLE)
     set(CMAKE_C_FLAGS_RELEASE "-DNDEBUG -O3 -Wall -fPIC -Wno-unused-result ${SANITIZE} ${COVERAGE} ${UNITTEST}")
     set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG -O3 -Wall -fPIC -std=c++11 -fno-rtti -fno-exceptions -Wno-unused-result -Wno-register -Wno-attributes ${SANITIZE} ${COVERAGE} ${UNITTEST}")
 elseif (APPLE)
-    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG")
-    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -D_DEBUG")
-    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -DNDEBUG")
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
+    if (OPT_UNITTEST)
+        set(UNITTEST "-fno-builtin -fno-strict-aliasing")
+        set(CMAKE_XCODE_ATTRIBUTE_GCC_STRICT_ALIASING "NO")
+    else()
+        set(UNITTEST "")
+    endif()
+    set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${UNITTEST} -D_DEBUG")
+    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${UNITTEST} -D_DEBUG")
+    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${UNITTEST} -DNDEBUG")
+    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${UNITTEST} -DNDEBUG")
     set(CMAKE_XCODE_ATTRIBUTE_CLANG_ENABLE_OBJC_WEAK "YES")
     set(CMAKE_XCODE_ATTRIBUTE_GCC_ENABLE_CPP_EXCEPTIONS "NO")
     set(CMAKE_XCODE_ATTRIBUTE_GCC_ENABLE_CPP_RTTI "NO")
 
-    if (OPT_UNITTEST)
-        set(CMAKE_XCODE_ATTRIBUTE_GCC_STRICT_ALIASING "NO")
-    endif()
 endif()