CMakeLibTests: Precompile common expensive headers

Tests/CMakeLib/CMakeLists.txt

@@ -68,6 +68,10 @@ file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/testUVProcessChainInput.txt" "HELLO WORL
 create_test_sourcelist(CMakeLib_TEST_SRCS CMakeLibTests.cxx ${CMakeLib_TESTS})
 add_executable(CMakeLibTests ${CMakeLib_TEST_SRCS})
 target_link_libraries(CMakeLibTests CMakeLib CTestLib)
+if(CMake_BUILD_PCH)
+  target_precompile_headers(CMakeLibTests PRIVATE "<iostream>" "<cm3p/uv.h>")
+  target_compile_definitions(CMakeLibTests PRIVATE "NOMINMAX")
+endif()
 
 set_property(TARGET CMakeLibTests PROPERTY C_CLANG_TIDY "")
 set_property(TARGET CMakeLibTests PROPERTY CXX_CLANG_TIDY "")