Description of problem:
The mingw{32,64}-cmake command uses absolute paths to specify certain locations. If the cmake configuration honors these paths then it breaks CPack which does a fake install for packaging purposes.

Version-Release number of selected component (if applicable):
mingw32-filesystem-99-3.fc20.noarch

Actual results:
An error is generated:
Run CPack packaging tool...
/usr/bin/cpack --config ./CPackConfig.cmake
CPack: Create package using NSIS
CPack: Install projects
CPack: - Run preinstall target for: codec2
CPack: - Install project: codec2
CMake Error at /home/build/mingw32/codec2/src/cmake_install.cmake:37 (message):
  ABSOLUTE path INSTALL DESTINATION forbidden (by caller):
  /usr/i686-w64-mingw32/sys-root/mingw/lib/libcodec2.dll.a

Expected results:
Package is created correctly.

Additional info:
The main problem seems to be CMAKE_INSTALL_LIBDIR...

$ rpm -E %{mingw32_cmake}
unset $(/usr/bin/env | egrep '^(w+)=(.*)$' | egrep -vw 'PWD|USER|LANG' | /usr/bin/cut -d= -f1);
  if test -z "$PATH_ORIG" ; then
    PATH_ORIG="$PATH"; export PATH_ORIG;
  fi;
  PATH="/usr/i686-w64-mingw32/sys-root/mingw/bin:$PATH_ORIG"; export PATH;
  HOST_CC=gcc; export HOST_CC;
  unset PKG_CONFIG_PATH;
  _PREFIX="/usr/bin/i686-w64-mingw32-";
  for i in `ls -1 ${_PREFIX}* | grep -v 'gcc-'`; do
    x=`echo $i|sed "s,${_PREFIX},,"|tr "a-z+-." "A-ZX__"`;
    declare -x $x="$i" ; export $x;
  done;
  unset _PREFIX;
  CC="${MINGW32_CC:-i686-w64-mingw32-gcc}"; export CC;
  CFLAGS="${MINGW32_CFLAGS:- -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4}"; export CFLAGS;
  CPPFLAGS="${MINGW32_CPPFLAGS:-}"; export CPPFLAGS;
  if [ -x "/usr/bin/i686-w64-mingw32-g++" ]; then
    CXX="${MINGW32_CXX:-i686-w64-mingw32-g++}"; export CXX;
    CXXFLAGS="${MINGW32_CXXFLAGS:- -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions --param=ssp-buffer-size=4}"; export CXXFLAGS;
  else
    CXX=; export CXX;
    ac_cv_prog_CXX=no; export ac_cv_prog_CXX;
    CXXFLAGS=; export CXXFLAGS;
  fi;
  LDFLAGS="${MINGW32_LDFLAGS:-}"; export LDFLAGS;
  for i in `ls /usr/i686-w64-mingw32/sys-root/mingw/bin/*|grep -- "-config$"` ; do
    x=`basename $i|tr "a-z+-." "A-ZX_"`;
    declare -x $x="$i" ; export $x;
  done;
  unset x i ;
  PKG_CONFIG_LIBDIR="/usr/i686-w64-mingw32/sys-root/mingw/lib/pkgconfig:/usr/i686-w64-mingw32/sys-root/mingw/share/pkgconfig"; export PKG_CONFIG_LIBDIR;
  if test -f CMakeLists.txt; then __mingw32_topdir=.; \
  elif test -f ../CMakeLists.txt; then __mingw32_topdir=..; \
  else __mingw32_topdir=""; fi; \
  PATH=/usr/i686-w64-mingw32/bin:$PATH /usr/bin/cmake \
        -DCMAKE_VERBOSE_MAKEFILE=ON \
        -DCMAKE_INSTALL_PREFIX:PATH=/usr/i686-w64-mingw32/sys-root/mingw \
        -DCMAKE_INSTALL_LIBDIR:PATH=/usr/i686-w64-mingw32/sys-root/mingw/lib \
        -DINCLUDE_INSTALL_DIR:PATH=/usr/i686-w64-mingw32/sys-root/mingw/include \
        -DLIB_INSTALL_DIR:PATH=/usr/i686-w64-mingw32/sys-root/mingw/lib \
        -DSYSCONF_INSTALL_DIR:PATH=/usr/i686-w64-mingw32/sys-root/mingw/etc \
        -DSHARE_INSTALL_PREFIX:PATH=/usr/i686-w64-mingw32/sys-root/mingw/share \
        -DCMAKE_SKIP_RPATH:BOOL=ON \
        -DBUILD_SHARED_LIBS:BOOL=ON \
        -DCMAKE_TOOLCHAIN_FILE=/usr/share/mingw/Toolchain-mingw32.cmake \
        ${MINGW_CMAKE_ARGS} \
        ${MINGW32_CMAKE_ARGS} \
        "$@" $__mingw32_topdir