just wanna see the error msg

CMakeLists.txt

@@ -218,7 +218,9 @@ if (ENABLE_MULTITHREADING)
     if (APPLE AND CMAKE_CXX_COMPILER_ID MATCHES "Clang")
       string(APPEND ErrorMsg " Try first calling `brew install libomp` then `export OpenMP_ROOT=$(brew --prefix)/opt/libomp`")
     endif()
-    message(FATAL_ERROR ErrorMsg)
+
+    # before fatally crashing
+    message(FATAL_ERROR ${ErrorMsg})
   endif()
 
   target_compile_definitions(QuEST PUBLIC COMPILE_OPENMP=1)
@@ -352,7 +354,10 @@ endif()
 ## Tests
 
 if (ENABLE_TESTING)
-  find_package(Catch2 3.8.0 QUIET)
+
+  set(CatchVersion 3.8.0)
+
+  find_package(Catch2 ${CatchVersion} QUIET)
 
   if (NOT TARGET Catch2::Catch2 AND DOWNLOAD_CATCH2)
     message(STATUS "Catch2 not found, it will be downloaded and built in the build directory.")
@@ -361,7 +366,7 @@ if (ENABLE_TESTING)
     FetchContent_Declare(
       Catch2
       GIT_REPOSITORY https://github.com/catchorg/Catch2.git
-      GIT_TAG        v3.8.0
+      GIT_TAG        v${CatchVersion}
     )
 
     FetchContent_MakeAvailable(Catch2)
@@ -370,7 +375,7 @@ if (ENABLE_TESTING)
     # We won't magically find it here, but this is the easiest way to
     # a) Force the build to fail, and
     # b) Print out all the useful information for helping CMake find Catch2
-    find_package(Catch2 3.8.0 REQUIRED)
+    find_package(Catch2 ${CatchVersion} REQUIRED)
   endif()
 
   include(Catch)