[CMake] Problem with library prefix/suffix when cross compiling.

[Peter Visser]

The great thing is that cross compiling was very simple with to setup with
CMake in my case,  I didn't  require a "special" CMakeLists.txt.

All I do is create a file e.g. "setmingw" with:

export CC=i586-mingw32msvc-gcc
export CXX=i586-mingw32msvc-g++
export LD=i586-mingw32msvc-ld
export AR=i586-mingw32msvc-ar
export AS=i586-mingw32msvc-as
export NM=i586-mingw32msvc-nm
export STRIP=i586-mingw32msvc-strip
export RANLIB=i586-mingw32msvc-ranlib
export DLLTOOL=i586-mingw32msvc-dlltool
export OBJDUMP=i586-mingw32msvc-objdump
export RESCOMP=i586-mingw32msvc-windres
export CFLAGS=

then a
% source setmingw
% cmake
% make

Unfortunately the command SET_TARGET_PROPERTIES( ...) doesn't solve the
library problem, linking against the library will result in
"cannot find -lexample.dll"
(here the dll suffix is to much)
The thing that works is renaming the libraries e.g. libexample.so to
example.dll

I wasn't aware that CMake does not support cross-compiling. Apart from
linking against the library with the correct prefix/suffix it works in my
case. Also I didn't know the option CROSS_MINGW32, however it setting the
option doesn't solve the problem.

Thanks for your help,

Peter.


On 11/16/06, Eric Noulard <eric.noulard at gmail.com> wrote:
>
> I am really interested in getting sample CMakeLists.txt
> since I just wanted to do what you've done, i.e. cross-compiling
> for win32 under linux.
>
> You should know that CMake does not currently support cross-compiling.
> See
> http://www.cmake.org/pipermail/cmake/2006-September/010959.html
> or
> http://www.cmake.org/pipermail/cmake/2006-September/010946.html
>
> For your "problem" I think you may try this in your
> project CMakeLists.txt
>
> IF (UNIX)
>     IF (CROSS_MINGW32)
>         SET(MY_TARGETLIB_PREFIX "")
>         SET(MY_TARGETLIB_SUFFIX ".dll")
>     ELSE (CROSS_MINGW32)
>         SET(MY_TARGETLIB_PREFIX "lib")
>         SET(MY_TARGETLIB_SUFFIX ".so")
>     ENDIF (CROSS_MINGW32)
> ENDIF (UNIX)
>
> I assume
> OPTION(CROSS_MINGW32  "Cross compile Win32 using mingw32" OFF)
>
> was set ON for mingw32 cross compiling
> and OFF for Linux "native" compiling.
>
> Then use your MY_TARGETLIB_xxx
> in all other places:
> SET_TARGET_PROPERTIES(ex1
>    PROPERTIES
>    PREFIX $(MY_TARGETLIB_PREFIX)
>    SUFFIX $(MY_TARGETLIB_SUFFIX)
>                                             )
>
> 2006/11/16, Peter Visser <pervulgo at gmail.com>:
> >  Hi,
> >
> >  I have a working build under win32 with MSYS/MINGW, now I would like to
> > cross-compile code for win32 with mingw from linux with by using the
> same
> > CMakelists.txt files. It almost works, the problem is that the shared
> > libraries are not named "myex.dll" but "libmyex.so". By using the
> following
> > command for all the libraries it can be solved:
> >
> >  SET_TARGET_PROPERTIES(ex1
> >
> > PROPERTIES PREFIX ""
> >                                                    SUFFIX
> > ".dll"
> >                                                   )
> >
> >  However, now I have to change the CMakelist.txt in all the
> subdirectories
> > and lose the ability to compile natively for linux (without adding an
> > IF(UNIX) around the SET_TARGET_PROPERTIES).
> >
> >  Is there a global option to set the PREFIX and SUFFIX, set the
> BUILD_TARGET
> > to win32 or something alike?
> >
> >  I tried setting:
> >
> >  SET(UNIX FALSE)
> >  SET(MINGW TRUE)
> >  SET(WIN32 TRUE)
> >
> >  But that doesn't help.
> >
> >  Any help is appreciated,
> >
> >  Peter.
> > _______________________________________________
> > CMake mailing list
> > CMake at cmake.org
> > http://www.cmake.org/mailman/listinfo/cmake
> >
> >
>
>
> --
> Erk
> _______________________________________________
> CMake mailing list
> CMake at cmake.org
> http://www.cmake.org/mailman/listinfo/cmake
>
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