[CMake] re-config on make all

[David Cole]

Now we're getting somewhere...

Which 2.4 are you on?

To force caching of "-D" variables with older cmake versions, specify a type
for each one (the ":STRING" in the modified version below). Also, I would
put the -D values before naming the source directory:

  cmake -G "MSYS Makefiles" -DCMAKE_SYSTEM:STRING=Generic
-DCMAKE_C_COMPILER_WORKS:STRING=1
    -DCMAKE_CXX_COMPILER_WORKS:STRING=1 -DCMAKE_COMPILER_IS_GNUCC:STRING=1
    -DCMAKE_COMPILER_IS_GNUCXX:STRING=1 -DTARGET:STRING=nios2 ../

The reason we are all confused trying to answer your question is that you
can do this without the ":STRING" in CMake 2.6. (In fact, I think the
caching behavior changed in one of the 2.4.x patch releases because people
were mainly confused about why ":STRING=" values were cached but simple "="
values were not.) I think 2.4.8 works the same as 2.6 in this regard.


HTH,
David




On 8/28/08, Vandenbroucke Sander <Sander.Vandenbroucke at vandewiele.com>
wrote:
>
>
> > > > Vandenbroucke Sander wrote:
> > > > Hi,
> > > >
> > > > Sometimes CMake re-configures my build tree when running make.
> > > > Unfortunately CMake uses wrong options, I normally set those on the
> > > > command line. This forces me to re-config & rebuild my entire source
> > > > tree. This is a bit annoying since, in most cases, this is not
> > necessary
> > > > and takes a long time.
> > > >
> > > > So here is my question: can I prevent the automatic reconfiguration
> > and
> > > > throw an error/warning so the user can do a manual reconfig?
> > > >
> > >
> > > CMake should use the same options.  Your options should have been
> > stored
> > > in the cache.
> > You are right, those options are not cached.
> >
> > But Bill's point was that they *should* be cached. So the question is:
> why > are your original command line -D options not saved in
> CMakeCache.txt...?
>
> They are my project specific options to define a target architecture. I
> have not cached them my self. So to fix this 'problem' I should cache all my
> -D options.
>
>
> > What version of CMake are you running?
> > (Send output of 'which cmake' and 'cmake --version'...)
>
> I'm still on 2.4. Upgrading is planned some time in the future.
>
>
> > What is your exact original command line for running CMake?
>
> set CC=distcc nios2-elf-gcc
> set CXX=distcc nios2-elf-g++
> cmake -G "MSYS Makefiles" ../ -DCMAKE_SYSTEM=Generic
> -DCMAKE_C_COMPILER_WORKS=1 -DCMAKE_CXX_COMPILER_WORKS=1
> -DCMAKE_COMPILER_IS_GNUCC=1 -DCMAKE_COMPILER_IS_GNUCXX=1 -DTARGET=nios2
>
>
> Sander.
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>
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