[CMake] check_cxx_compiler_flag() doesn't work with cl.exe/rc.exe

[Alexander Neundorf]

On Monday 27 August 2007 14:21, Dizzy wrote:
> On Monday 27 August 2007 20:36:25 Alexander Neundorf wrote:
> > On Monday 27 August 2007 13:29, Dizzy wrote:
> > > Hello
> > >
> > > I use check_cxx_compiler_flag(-ansi -pedantic) to try to use these
> > > flags where they are valid. However when using nmake makefiles
> > > generator cmake doesn't seem to detect that cl.exe doesn't need them (I
> > > noticed cl.exe doesn't error but warns on using those flags but this
> > > still means the compiler doesn't support them, not to mention it
> > > creates tons of redundant warnings about those flags).
> >
> > This test only checks whether the compiler fails with an error if used
> > with the given flag.
>
> In that case shouldn't cmake (since it must deal with different compilers
> etc) make sure that when using cl.exe it also uses /weX to enable that
> warning as an error to check if the flag is supported?

Not sure, maybe. Maybe then some other users will complain about the 
behaviour ?

> > I think for setting compiler flags it is ok to have separate sections for
> > gcc and msvc.
>
> It could also be handle by cmake :) 

Yes, it could :-)

Bye
Alex