-g flag not picked up for PCH compile

[tamboril]

For some reason, the -g flag is not in CMake's $<TARGET_PROPERTY:xxx,COMPILE_FLAGS> nor
...COMPILE_OPTIONS, and so doesn't get written to the .rsp file.

This results in a warning of different options for pch and regular source compile.

Temporarily adding -g to the export_all_flags function fixed the warning.

Do you know Is there some other CMake property for the debug flag?

[demon90s]

-std=c++11