Fix C++ header problem on MacOS

  * tool did not find C++ headers on MacOS
  * solved this by putting a soft link into the expected place

Author: sawenzel

tool/CMakeLists.txt

@@ -39,3 +39,12 @@ install(PROGRAMS run_O2CodeChecker.py DESTINATION bin)
 # we need to install the builtin headers in a path which is searched by the tool
 # FIXME: a soft link would be better
 install(DIRECTORY ${LLVM_LIBRARY_DIR}/clang/${LLVM_PACKAGE_VERSION}/include DESTINATION lib/clang/${LLVM_PACKAGE_VERSION})
+
+IF(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
+  # On MacOS we need to do the same with C++ headers since they are in a non-standard location
+  # (alternative would be to set the CPATH environment variable)
+  INSTALL(CODE "execute_process(COMMAND mkdir ${CMAKE_INSTALL_PREFIX}/include)")
+  INSTALL(CODE "execute_process(COMMAND ln -sf \
+      /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++ \
+      ${CMAKE_INSTALL_PREFIX}/include/c++)")
+ENDIF()