[CMake] No Color Output With "cmake --build" in CMake 2.8
Brad King
brad.king at kitware.com
Thu Dec 17 14:56:29 EST 2009
Eskandar Ensafi wrote:
> When I use the Unix Makefile generator (or the NMake Makefile generator
> under Windows), running “cmake --build <bindir>” does not produce color
> output, whereas “cd <bindir> && make” does. Is there a reason for this,
> or have I stumbled upon a bug?
The color output auto-detects whether it is attached to an interactive
terminal (tty). If not, it does not print the escapes. When cmake
runs the "make" command through --build, it hands the process a new
pipe and not its own stdout (which might be a tty).
The --build option is meant for scripts to drive builds and log output
to a file, so no color is desired. I would consider interactive use
of --build to be a feature request. Its implementation re-uses some
of the automated build command invocation used by CTest's ctest_build
command. Adding a pass-thru to the outer process's pipe is somewhat
tricky.
-Brad
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