[Mesa-dev] [Bug 44618] New: Cross-compilation broken by glsl builtin_compiler

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=44618

             Bug #: 44618
           Summary: Cross-compilation broken by glsl builtin_compiler
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Other
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: thierry.reding at avionic-design.de


When cross-compiling Mesa 7.11 and later, it errors out when trying to generate
the glsl builtins. The reason is that the builtin_compiler binary is built for
the host system instead of the build system. This was already discussed after
the commit that introduced this error but was never solved:

    http://lists.freedesktop.org/archives/mesa-dev/2011-January/004780.html

AFAICT there are two solutions:
  1) Fix the build system to generate the builtin_compiler for the build system
     using something like CC_FOR_BUILD (I don't know if SCons has an
equivalent)
     which will require pretty much all of the src/glsl subdirectory to be
built
     twice.
  2) Modify the build system to allow the builtin_compiler to be overridden,
     such that Mesa can be built once for the build host, and the resulting
     builtin_compiler binary can be used in the Mesa cross-build.

I believe 1) would be the best option. 2) is cumbersome and will require two
complete builds, while 1) would only require parts of the src/glsl directory
to be rebuilt. 1) also has the advantage that the build will work
out-of-the-box
without the user having to follow special instructions.

I'm willing to spend some time on this, but wanted to discuss things first.

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.