Being more narrow.

Author: lemire

tests/CMakeLists.txt

@@ -33,9 +33,10 @@ target_compile_definitions(supplemental-data INTERFACE SUPPLEMENTAL_TEST_DATA_DI
 function(fast_float_add_cpp_test TEST_NAME)
     add_executable(${TEST_NAME} ${TEST_NAME}.cpp)
     add_test(${TEST_NAME} ${TEST_NAME})
-    if(WIN32)
+    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
       target_compile_options(${TEST_NAME} PUBLIC /EHsc)
-    else()
+    endif()
+    if(NOT WIN32)
       target_compile_options(${TEST_NAME} PUBLIC -Werror -Wall -Wextra -Weffc++)
       target_compile_options(${TEST_NAME} PUBLIC -Wsign-compare -Wshadow -Wwrite-strings -Wpointer-arith -Winit-self -Wconversion -Wsign-conversion)
     endif()