Merge pull request #664 from danieldk/remove-build-path

Strip build directory prefix in the __FILE__ macro

Author: taku910

Diff for: CMakeLists.txt

@@ -31,6 +31,13 @@ option(SPM_USE_EXTERNAL_ABSL "Use external protobuf" OFF)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+if((CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND
+     CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 10.0) OR
+   (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND
+     CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 8.0))
+  string(APPEND CMAKE_CXX_FLAGS " -fmacro-prefix-map=${CMAKE_SOURCE_DIR}/=''")
+endif()
+
 if (UNIX)
   include(GNUInstallDirs)
   set(prefix ${CMAKE_INSTALL_PREFIX})