[CMake] CMAKE_TOOLCHAIN_FILE support, empty CMAKE_AR && CMAKE_RANLIB

[Alexander Neundorf]

On Monday 01 March 2010, Oleg Kravchenko wrote:
> неділя 28 лютий 2010 17:24:48 Alexander Neundorf ви написали:
> > On Saturday 27 February 2010, Oleg Kravchenko wrote:
> > > Hello i am try build tinyxml library by mingw32 on gentoo linux with
> > > cmake: =dev-util/cmake-2.6.4-r3
> > > =dev-util/cmake-2.8.0-r2
> > >
> > > But have this errors:
> > > $ cmake -DCMAKE_TOOLCHAIN_FILE=~/i686-pc-mingw32.cmake -
> > > DDOKAN_INCLUDE_DIR=~/projects/dokan/ -DCMAKE_BUILD_TYPE=Debug .
> > > -- The C compiler identification is GNU
> > > -- The CXX compiler identification is GNU
> > > -- Check for working C compiler: /usr/bin/i686-pc-mingw32-gcc
> > > -- Check for working C compiler: /usr/bin/i686-pc-mingw32-gcc -- works
> > > -- Detecting C compiler ABI info
> > > -- Detecting C compiler ABI info - done
> > > -- Check for working CXX compiler: /usr/bin/i686-pc-mingw32-g++
> > > -- Check for working CXX compiler: /usr/bin/i686-pc-mingw32-g++ --
> > > works -- Detecting CXX compiler ABI info
> > > -- Detecting CXX compiler ABI info - done
> > > -- Configuring done
> > > -- Generating done
> > > -- Build files have been written to: /home/kaa/projects/tinyxml
> > > $ make
> > > [ 12%] Building CXX object
> > > tinyxml_build/CMakeFiles/tinyxml.dir/tinystr.cpp.obj
> > > [ 25%] Building CXX object
> > > tinyxml_build/CMakeFiles/tinyxml.dir/tinyxml.cpp.obj
> > > [ 37%] Building CXX object
> > > tinyxml_build/CMakeFiles/tinyxml.dir/tinyxmlerror.cpp.obj
> > > [ 50%] Building CXX object
> > > tinyxml_build/CMakeFiles/tinyxml.dir/tinyxmlparser.cpp.obj
> > > Linking CXX static library
> > > /home/kaa/projects/sqlfs/target/Debug/libtinyxml.a Error running link
> > > command: No such file or directory
> > > make[2]: *** [/home/kaa/projects/win32/target/Debug/libtinyxml.a] Error
> > > 2 make[1]: *** [tinyxml_build/CMakeFiles/tinyxml.dir/all] Error 2 make:
> > > *** [all] Error 2
> > >
> > > I "fix" problem by patching CMakeFindBinUtils.cmake
> > >
> > > Please fix and release 2.6.x and 2.8.x version
> >
> > Strange.
> > Please apply the attached patch to CMakeDetermineCCompiler.cmake and run
> >  cmake again on a fresh build dir, and post the output.
> >
> > Alex
>
> Hello! In attachment output log.

Thanks.
Attached is another small patch for CMakeFindBinutils.cmake. Please apply and 
post again the output.
I think what happens is the following:
cmake determines the toolchain prefix and the location correctly  
("i686-pc-mingw32-" and "/usr/bin" respectively).
Then it goes into CMakeFindBinutils.cmake to search for ar. But since you have 
already set this in your toolchain file, the find_program() call doesn't 
search for it (since it is already set).
Since it doesn't search for it, the CMAKE_AR variable doesn't get stored in 
the cache, so it is empty later on.

Let's see if we can verify this with the attached patch.

Alex
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