CGAL users discussion list

[xantares 09 <>]

> From:
> To:
> Date: Thu, 27 Nov 2014 13:18:36 +0100
> Subject: Re: [cgal-discuss] MinGW issues
>
> Le Wednesday 26 November 2014 14:59:46 xantares 09 a écrit :
> > Hello,
> >
> >
> > I've got issues cross-compiling CGAL 4.5 with MinGW64 (mingw-gcc 4.9.1) from
> >
> > linux (x86_64 host).
>
> Can you post an email explaining how you did that with CMake? What toolchain
> file have you used, and how have you solved all the issue of system
> introspection?

I did not encounter any particular issue with MinGW installation,
as my distro provides it along with zlib, mpfr, boost, and qt4 dependencies.

For the cmake setup I used the toolchains of my distribution too, nothing unusual for cmake cross-compiling:
SET(CMAKE_SYSTEM_NAME Windows)

# specify the cross compiler
SET(CMAKE_C_COMPILER $arch-gcc)
SET(CMAKE_CXX_COMPILER $arch-g++)

# where is the target environment
SET(CMAKE_FIND_ROOT_PATH /usr/$arch)

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

These are used through an $arch-cmake wrapper for mingw
which sets CMAKE_TOOLCHAIN_FILE for the right $arch (i686-mingw or x86_64-mingw), and the right compilation flags:

The most annoying part was to manually provide the result of plaftorm checks as invoking try_run while cross-compiling failed:
$arch-cmake -DCMAKE_BUILD_TYPE=Release \
      -DGCC_RUN_RES=0 -DGCC_RUN_RES__TRYRUN_OUTPUT="version=4.9.2" \
      -DGMP_RUN_RES=0 -DGMP_RUN_RES__TRYRUN_OUTPUT="version=6.0.0" \
      -DMPFR_RUN_RES=0 -DMPFR_RUN_RES__TRYRUN_OUTPUT="version=3.1.2" \
      -DZLIB_RUN_RES=0 -DZLIB_RUN_RES__TRYRUN_OUTPUT="version=1.2.8" \
      -DQT4_RUN_RES=0 -DQT4_RUN_RES__TRYRUN_OUTPUT="version=4.8.6" \
      -DCGAL_CFG_BOOST_VARIANT_SWAP_BUG=0 \
      -DCGAL_CFG_DENORMALS_COMPILE_BUG=0 \
      -DCGAL_CFG_FPU_ROUNDING_MODE_UNWINDING_VC_BUG=0 \
      -DCGAL_CFG_IEEE_754_BUG=0 \
      -DCGAL_CFG_ISTREAM_INT_BUG=0 \
      -DCGAL_CFG_MATCHING_BUG_5=0 \
[...]

cgal is now packaged as an additional mingw library, see here:
https://aur.archlinux.org/packages/mingw-w64-cgal/


> --
> Laurent Rineau, PhD
> R&D Engineer at GeometryFactory http://www.geometryfactory.com/
> Release Manager of the CGAL Project http://www.cgal.org/
>
>
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