Broken build under GCC/MinGW 4.8.1

[FaultyRAM]

At the moment, GCC/MinGW 4.8.1 won't compile the code base. Once some easily-fixed issues are resolved (not including <string> on Windows, not expecting OpenAL-Soft on Windows, using DirectInput constants - which aren't actually constants - as switch cases), the build hits a show-stopper during the linker phase:

[...]
cd /d J:\msys\home\FaultyRAM\c++\build\OpenJK\code && J:\mingw32\bin\windres.exe  -O coff -IJ:\msys\home\FaultyRAM\c++\OpenJK\lib -IJ:\msys\local\include     J:\msys\home\FaultyRAM\c++\OpenJK\code\win32\winquake.rc CMakeFiles\openjk_sp.x86.dir\win32\winquake.rc.obj
Linking CXX executable ..\openjk_sp.x86.exe
cd /d J:\msys\home\FaultyRAM\c++\build\OpenJK\code && "C:\Program Files\CMake 2.8\bin\cmake.exe" -E cmake_link_script CMakeFiles\openjk_sp.x86.dir\link.txt --verbose=1
"C:\Program Files\CMake 2.8\bin\cmake.exe" -E remove -f CMakeFiles\openjk_sp.x86.dir/objects.a
J:\mingw32\bin\ar.exe cr CMakeFiles\openjk_sp.x86.dir/objects.a @CMakeFiles\openjk_sp.x86.dir\objects1.rsp
J:\mingw32\bin\i686-w64-mingw32-c++.exe      -mwindows -Wl,--whole-archive CMakeFiles\openjk_sp.x86.dir/objects.a -Wl,--no-whole-archive  -o ..\openjk_sp.x86.exe -Wl,--out-implib,libopenjk_sp.x86.dll.a -Wl,--major-image-version,0,--minor-image-version,0  -lwinmm -lglu32 -lopengl32 J:\msys\local\lib\libOpenAL32.dll.a J:\msys\local\lib\libz.dll.a -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32 
CMakeFiles\openjk_sp.x86.dir/objects.a(sv_world.cpp.obj):sv_world.cpp:(.text$_ZNK13CGhoul2Info_v9InfoArrayEv[__ZNK13CGhoul2Info_v9InfoArrayEv]+0xa): undefined reference to `TheGameGhoul2InfoArray()'
CMakeFiles\openjk_sp.x86.dir/objects.a(genericparser2.cpp.obj):genericparser2.cpp:(.text+0x2c9): undefined reference to `gi'
CMakeFiles\openjk_sp.x86.dir/objects.a(genericparser2.cpp.obj):genericparser2.cpp:(.text+0x2fc): undefined reference to `gi'
collect2.exe: error: ld returned 1 exit status
mingw32-make.exe[2]: *** [openjk_sp.x86.exe] Error 1
mingw32-make.exe[1]: *** [code/CMakeFiles/openjk_sp.x86.dir/all] Error 2
mingw32-make.exe: *** [all] Error 2
code\CMakeFiles\openjk_sp.x86.dir\build.make:2633: recipe for target 'openjk_sp.x86.exe' failed
mingw32-make.exe[2]: Leaving directory 'J:/msys/home/FaultyRAM/c++/build/OpenJK'
CMakeFiles\Makefile2:85: recipe for target 'code/CMakeFiles/openjk_sp.x86.dir/all' failed
mingw32-make.exe[1]: Leaving directory 'J:/msys/home/FaultyRAM/c++/build/OpenJK'
J:/msys/home/FaultyRAM/c++/build/OpenJK/Makefile:138: recipe for target 'all' failed

Tested with MSYS Makefile, Code::Blocks/MinGW and Code::Blocks/Unix systems, on Windows XP SP3 w/ MinGW-Builds GCC 4.8.1 rev. 1.

[xycaleth]

I have a feeling it has something to do with the CMake script being too general with its if conditions. i.e. if(WIN32) assumes that MSVC is used.

[netfab]

Same error while trying to build on Gentoo Linux :

CMakeFiles/openjk_sp.i386.dir/server/sv_world.cpp.o: In function CGhoul2Info_v::InfoArray() const': sv_world.cpp:(.text._ZNK13CGhoul2Info_v9InfoArrayEv[CGhoul2Info_v::InfoArray() const]+0x7): undefined reference toTheGameGhoul2InfoArray()' CMakeFiles/openjk_sp.i386.dir/game/genericparser2.cpp.o: In function CTextPool::CTextPool(int)': genericparser2.cpp:(.text+0x317): undefined reference togi' CMakeFiles/openjk_sp.i386.dir/game/genericparser2.cpp.o: In function CTextPool::~CTextPool()': genericparser2.cpp:(.text+0x348): undefined reference togi' collect2: ld returned 1 exit status make[2]: *\ [openjk_sp.i386] Error 1