diff --git a/CMakeLists.txt b/CMakeLists.txt
index f7f1566f..4265a6c2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -135,24 +135,21 @@ else()
   endif()
 
   # Coverage build type
-  set(CMAKE_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}" CACHE STRING
-    "Flags used by the C++ compiler during coverage builds."
+  set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
+    CACHE STRING "Flags used by the C++ compiler during coverage builds."
     FORCE)
-  set(CMAKE_EXE_LINKER_FLAGS_COVERAGE
-    "${CMAKE_EXE_LINKER_FLAGS_DEBUG}" CACHE STRING
-    "Flags used for linking binaries during coverage builds."
+  set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
+    CACHE STRING "Flags used for linking binaries during coverage builds."
     FORCE)
-  set(CMAKE_SHARED_LINKER_FLAGS_COVERAGE
-    "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}" CACHE STRING
-    "Flags used by the shared libraries linker during coverage builds."
+  set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
+    CACHE STRING "Flags used by the shared libraries linker during coverage builds."
     FORCE)
   mark_as_advanced(
-    CMAKE_CXX_FLAGS_COVERAGE
-    CMAKE_EXE_LINKER_FLAGS_COVERAGE
-    CMAKE_SHARED_LINKER_FLAGS_COVERAGE)
+    BENCHMARK_CXX_FLAGS_COVERAGE
+    BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
+    BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
   set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
-    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage."
-    FORCE)
+    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
   add_cxx_compiler_flag(--coverage COVERAGE)
 endif()
 
diff --git a/cmake/AddCXXCompilerFlag.cmake b/cmake/AddCXXCompilerFlag.cmake
index 0b176ba2..17d5f3dc 100644
--- a/cmake/AddCXXCompilerFlag.cmake
+++ b/cmake/AddCXXCompilerFlag.cmake
@@ -38,7 +38,7 @@ function(add_cxx_compiler_flag FLAG)
     if(ARGV1)
       string(TOUPPER "_${VARIANT}" VARIANT)
     endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
+    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
   endif()
 endfunction()
 
diff --git a/cmake/CXXFeatureCheck.cmake b/cmake/CXXFeatureCheck.cmake
index 1a454f85..b2a82171 100644
--- a/cmake/CXXFeatureCheck.cmake
+++ b/cmake/CXXFeatureCheck.cmake
@@ -22,7 +22,7 @@ function(cxx_feature_check FILE)
   string(TOUPPER ${FILE} VAR)
   string(TOUPPER "HAVE_${VAR}" FEATURE)
   if (DEFINED HAVE_${VAR})
-    set(HAVE_${VAR} 1 CACHE INTERNAL "Feature test for ${FILE}" PARENT_SCOPE)
+    set(HAVE_${VAR} 1 PARENT_SCOPE)
     add_definitions(-DHAVE_${VAR})
     return()
   endif()
@@ -50,7 +50,7 @@ function(cxx_feature_check FILE)
 
   if(RUN_${FEATURE} EQUAL 0)
     message("-- Performing Test ${FEATURE} -- success")
-    set(HAVE_${VAR} 1 CACHE INTERNAL "Feature test for ${FILE}" PARENT_SCOPE)
+    set(HAVE_${VAR} 1 PARENT_SCOPE)
     add_definitions(-DHAVE_${VAR})
   else()
     if(NOT COMPILE_${FEATURE})