[Mesa-dev] Compiling llvm windows name mangled

[Jason Anderssen]

Thank you,

I will investigate if I can get a windows build to work, and see how difficult it is, as we kind of want to have a single process in windows to load both OpenGL, and Mesa3D at the sometime, and the ability to use either simultaneously.

Cheers
Jason

From: Jose Fonseca <jfonseca at vmware.com<mailto:jfonseca at vmware.com>>
Date: Wed, 10 Dec 2014 14:18:08 +0000
To: Jason Anderssen <janderssen at exactal.com<mailto:janderssen at exactal.com>>, "mesa-dev at lists.freedesktop.org<mailto:mesa-dev at lists.freedesktop.org>" <mesa-dev at lists.freedesktop.org<mailto:mesa-dev at lists.freedesktop.org>>
Subject: RE: Compiling llvm windows name mangled


I never tried, but it doesn't surprise that ​USE_MGL_NAMESPACE doesn't work properly on Windows.


At very least the src/mesa/drivers/windows/gdi and src/gallium/targets/libgl-gdi targets will fail because the .DEF files there explicitly request the non-mangled symbols.


Not sure if src/mesa/drivers/osmesa will produce something useful. You can ask scons to only build osmesa by passing "scons osmesa .."

​


That said, there's little to zero merit in USE_MGL_NAMESPACE on Windows because on Windows it's fine to have different DLLs exporting the same symbols, since unlike Unixes, DLLs exports are not dumped into a global namespace.


Jose


________________________________
From: mesa-dev <mesa-dev-bounces at lists.freedesktop.org<mailto:mesa-dev-bounces at lists.freedesktop.org>> on behalf of Jason Anderssen <JAnderssen at exactal.com<mailto:JAnderssen at exactal.com>>
Sent: 09 December 2014 21:45
To: mesa-dev at lists.freedesktop.org<mailto:mesa-dev at lists.freedesktop.org>
Subject: [Mesa-dev] Compiling llvm windows name mangled

Hi All,

I am trying to compile osmesa on linux with llvm for win32.  I added the CFLAGS += -DUSE_MGL_NAMESPACE to the environment of the SConstruct, and the build process seems to be ok until the end when it tries to link the opengl32.dll, basically a lot of symbol not defined errors.
Was wondering what is the correct way to build this mangled version of the dll?, or what step have I missed.

The instructions on building the mesa3d dll that I follow is from this link http://qt-project.org/wiki/Cross-compiling-Mesa-for-Windows<https://urldefense.proofpoint.com/v2/url?u=http-3A__qt-2Dproject.org_wiki_Cross-2Dcompiling-2DMesa-2Dfor-2DWindows&d=AAMFAg&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=zfmBZnnVGHeYde45pMKNnVyzeaZbdIqVLprmZCM2zzE&m=6Ge3DEjWspM0_R8wmG4D9XUdqs4zKcdsmCWMwnnpm3w&s=azooVAijwKtW_999Prr91rlFVONWeD5zHoI2iIRRK80&e=>

Cheers
Jason Anderssen.
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