Why Ninja outputs no colors but make does using the same CMakeLists.txt

[c02y]

I'm using the same CMakeLists.txt, when I set Unix Makefiles which is the default value for CMAKE_GENERATOR variable, if there are errors in the source code, make will print colors for the "error" keyword and the related lines in the terminal, but when I set CMAKE_GENERATOR Ninja, ninja will not output any color for the "error" keyword and related lines( red for the "FAILED" line at the beginning of the output though).

#814 says I have to add

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fdiagnostics-color=always")

to make ninja output color and it works.

Since make doesn't need this line, is it able to make ninja output colors by default (use an option if you need to disable colors)

Is it a bug?

FYI:
ninja v1.10.2

[jhasse]

https://github.com/ninja-build/ninja/wiki/FAQ