cmake: disable LTO/IPO when testing is enabled, it's annoying waiting a million years to recompile

Author: craftablescience

CMakeLists.txt

@@ -106,9 +106,11 @@ endif()
 if(PROJECT_IS_TOP_LEVEL)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-    include(CheckIPOSupported)
-    check_ipo_supported(RESULT SOURCEPP_BUILD_WITH_LTO)
-    set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ${SOURCEPP_BUILD_WITH_LTO})
+    if(NOT SOURCEPP_BUILD_TESTS)
+        include(CheckIPOSupported)
+        check_ipo_supported(RESULT SOURCEPP_BUILD_WITH_LTO)
+        set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ${SOURCEPP_BUILD_WITH_LTO})
+    endif()
 endif()
 
 if(SOURCEPP_USE_STATIC_MSVC_RUNTIME)