diff --git a/CMakeLists.txt b/CMakeLists.txt
index 823844ac..57a54033 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -236,8 +236,14 @@ if (ARCH_AARCH64)
     endif ()
 endif(ARCH_AARCH64)
 
-set(ARCH_C_FLAGS "-${ARCH_FLAG}=${GNUCC_ARCH} -mtune=${TUNE_FLAG} ${ARCH_C_FLAGS}")
-set(ARCH_CXX_FLAGS "-${ARCH_FLAG}=${GNUCC_ARCH} -mtune=${TUNE_FLAG} ${ARCH_CXX_FLAGS}")
+
+message(STATUS "ARCH_C_FLAGS   : ${ARCH_C_FLAGS}")
+message(STATUS "ARCH_CXX_FLAGS : ${ARCH_CXX_FLAGS}")
+
+if (NOT FAT_RUNTIME)
+    set(ARCH_C_FLAGS "-${ARCH_FLAG}=${GNUCC_ARCH} -mtune=${TUNE_FLAG} ${ARCH_C_FLAGS}")
+    set(ARCH_CXX_FLAGS "-${ARCH_FLAG}=${GNUCC_ARCH} -mtune=${TUNE_FLAG} ${ARCH_CXX_FLAGS}")
+endif()
 
 #if (ARCH_IA32 OR ARCH_X86_64 OR ARCH_ARM32 OR ARCH_AARCH64)
 #    if (NOT CMAKE_C_FLAGS MATCHES .*march.* AND NOT CMAKE_C_FLAGS MATCHES .*mtune.*)