diff --git a/CMakeLists.txt b/CMakeLists.txt
index f38e8b807..a161cf092 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -275,10 +275,18 @@ macro(ADD_CXX_COMPILER_FLAG_IF_AVAILABLE flag have)
     include(CheckCXXCompilerFlag)
     check_cxx_compiler_flag(${flag} ${have})
     if(${have})
-        add_definitions(${flag})        
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}")
     endif(${have})
 endmacro(ADD_CXX_COMPILER_FLAG_IF_AVAILABLE)
 
+macro(ADD_C_COMPILER_FLAG_IF_AVAILABLE flag have)
+    include(CheckCCompilerFlag)
+    check_c_compiler_flag(${flag} ${have})
+    if(${have})
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}")
+    endif(${have})
+endmacro(ADD_C_COMPILER_FLAG_IF_AVAILABLE)
+
 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wno-comment -Wno-reorder -Wno-unused-but-set-variable -Wno-unused-variable -Wtype-limits -std=c++11")
 
@@ -292,9 +300,13 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=${GCC_ARCH} -mfpmath=sse -msse4.1 -DLV_HAVE_SSE")
     endif(HAVE_AVX)
   endif (HAVE_AVX2)
+
+  if(NOT WIN32)
+      ADD_CXX_COMPILER_FLAG_IF_AVAILABLE(-fvisibility=hidden HAVE_VISIBILITY_HIDDEN_CXX)
+  endif(NOT WIN32)
 endif(CMAKE_CXX_COMPILER_ID MATCHES "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
 
-ADD_CXX_COMPILER_FLAG_IF_AVAILABLE("-Werror=incompatible-pointer-types" HAVE_ERROR_INCOMPATIBLE)
+ADD_C_COMPILER_FLAG_IF_AVAILABLE("-Werror=incompatible-pointer-types" HAVE_ERROR_INCOMPATIBLE)
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-comment -Wno-write-strings -Winline -Wno-unused-result -Wformat -Wmissing-field-initializers -Wtype-limits -std=c99 -D_GNU_SOURCE")
@@ -363,7 +375,7 @@ if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
   endif(NOT HAVE_SSE AND NOT HAVE_NEON AND NOT DISABLE_SIMD)
 
   if(NOT WIN32)
-      ADD_CXX_COMPILER_FLAG_IF_AVAILABLE(-fvisibility=hidden HAVE_VISIBILITY_HIDDEN)
+      ADD_C_COMPILER_FLAG_IF_AVAILABLE(-fvisibility=hidden HAVE_VISIBILITY_HIDDEN_C)
   endif(NOT WIN32)
 
   if (ENABLE_ASAN AND ENABLE_MSAN)