cmake: coverage flags for clang too
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 558aedf..1afe780 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@
 if(CMAKE_COMPILER_IS_GNUCC)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -Wall -Wextra -W -Wdeclaration-after-statement")
   set(CMAKE_C_FLAGS_DEBUG "-g3 -O0")
-  set(CMAKE_C_FLAGS_COVERAGE "-g3 -O0 -fprofile-arcs -ftest-coverage -lgcov")
+  set(CMAKE_C_FLAGS_COVERAGE "-g3 -O0 --coverage")
   set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS} -Werror -Wlogical-op -Wwrite-strings")
   set(CMAKE_C_FLAGS_CHECKFULL "${CMAKE_C_FLAGS_CHECK} -Wcast-qual")
 endif(CMAKE_COMPILER_IS_GNUCC)
@@ -16,16 +16,21 @@
 if(CMAKE_COMPILER_IS_CLANG)
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O2 -Wall -Wextra -W -Wdeclaration-after-statement")
   set(CMAKE_C_FLAGS_DEBUG "-g3 -O0")
+  set(CMAKE_C_FLAGS_COVERAGE "-g3 -O0 --coverage")
   set(CMAKE_C_FLAGS_CHECK "${CMAKE_C_FLAGS} -Werror -Wpointer-arith -Wwrite-strings -Wdocumentation")
 endif(CMAKE_COMPILER_IS_CLANG)
 
 set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE}
     CACHE STRING "Choose the type of build: None Debug Release Coverage Check CheckFull"
     FORCE)
+
 if(CMAKE_BUILD_TYPE STREQUAL "Coverage")
   if(CMAKE_COMPILER_IS_GNUCC)
-    set(CMAKE_SHARED_LINKER_FLAGS "-fprofile-arcs -ftest-coverage")
+    set(CMAKE_SHARED_LINKER_FLAGS "--coverage")
   endif(CMAKE_COMPILER_IS_GNUCC)
+  if(CMAKE_COMPILER_IS_CLANG)
+    set(CMAKE_SHARED_LINKER_FLAGS "--coverage")
+  endif(CMAKE_COMPILER_IS_CLANG)
 endif(CMAKE_BUILD_TYPE STREQUAL "Coverage")
 
 option(USE_PKCS11_HELPER_LIBRARY "Build PolarSSL with the pkcs11-helper library." OFF)