There is no "FATAL" in message(), only "FATAL_ERROR" (#584)

CMakeLists.txt

@@ -216,7 +216,7 @@ if (BENCHMARK_USE_LIBCXX)
     # linker flags appear before all linker inputs and -lc++ must appear after.
     list(APPEND BENCHMARK_CXX_LIBRARIES c++)
   else()
-    message(FATAL "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
+    message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
   endif()
 endif(BENCHMARK_USE_LIBCXX)
 

cmake/HandleGTest.cmake

@@ -94,7 +94,7 @@ if (BENCHMARK_ENABLE_GTEST_TESTS)
           HINTS ${HPATH}
       )
       if (NOT HEADER_PATH_${HEADER})
-        message(FATAL "Failed to find header ${HFILE} in ${HPATH}")
+        message(FATAL_ERROR "Failed to find header ${HFILE} in ${HPATH}")
       endif()
       list(APPEND GTEST_INCLUDE_DIRS ${HEADER_PATH_${HEADER}})
     endforeach()
@@ -105,7 +105,7 @@ if (BENCHMARK_ENABLE_GTEST_TESTS)
     find_path(GMOCK_INCLUDE_DIRS gmock/gmock.h
         HINTS ${GTEST_INCLUDE_DIRS})
     if (NOT GMOCK_INCLUDE_DIRS)
-      message(FATAL "Failed to find header gmock/gmock.h with hint ${GTEST_INCLUDE_DIRS}")
+      message(FATAL_ERROR "Failed to find header gmock/gmock.h with hint ${GTEST_INCLUDE_DIRS}")
     endif()
     set(GTEST_INCLUDE_DIRS ${GTEST_INCLUDE_DIRS} ${GMOCK_INCLUDE_DIRS})
     # FIXME: We don't currently require the gmock library to build the tests,