[CMake] Can't Remove CXX_FLAGS entry

Stewart, Robert Robert.Stewart at sig.com
Tue Oct 29 16:51:42 EDT 2013


I wrote:
>
> When I generate NMake files for a project, to build on
> Windows, CMAKE_CXX_FLAGS_DEBUG includes /RTC1.  That's fine
> for most of the libraries in the build tree, but one uses
> /CLR and that conflicts with /RTC1.  Is there a way to update
> the compiler flags for a particular target?
>
> A search reveals that the out-of-tree build directory,
> corresponding to the target's list file directory (foo.dir),
> contains a flags.make with a CXX_FLAGS variable that contains
> /RTC1 and /CLR.  I'd like to remove /RTC1 from that so the
> build will work.
>
> Obviously, I could change the cached CMAKE_CXX_FLAGS_DEBUG
> contents using SET() with FORCE, but that affects the other
> targets, so I'd have to add /RTC1 back for each of them.  It
> would be much more appropriate to just subtract the flag
> where not wanted.
>
> I tried STRING(REPLACE) for CMAKE_CXX_FLAGS_DEBUG and
> CXX_FLAGS, but they don't work.  I tried using
> GET_PROPERTY()/SET_PROPERTY() to extract, update, and write
> COMPILE_FLAGS for both DIRECTORY and TARGET, thinking that
> COMPILE_FLAGS might be the property equivalent of CXX_FLAGS.
> Nothing I've tried works.
>
> Any ideas?

Anyone?

_____
Rob Stewart
Software Engineer
Dev Tools & Components
Susquehanna International Group, LLP

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