Comment # 3
on bug 88209
from athomas@synexxus.com
The patch seems to be in the right direction of removing the dependance of
LLVM in the source code, but I dont have hardware to test functionality. I can
test that it compiles when LLVM isn't specified on Monday. I don't have enough
knowledge on the internal workings of the driver to make comments on the
implications of the code chages though.
A couple of notes I meant to add last night:
Build Environment:
- Building directly on an ARM platform. imx6 - very similar to sabrelite.
- I set the prefix to be someplace in my /home directory via the X.org build.sh
script.
- Flags: --enable-driglx-direct --enable-gles1 --enable-gles2 --enable-glx
--with-dri-drivers=radeon
Additional notes about the mesa build with llvm:
Normally the auto setting for enable_gallium_llvm will set
enable_gallium=llvm=yes and trigger llvm to be used with the driver. This is
NOT the case if the host CPU is not i*86/x96_64/AMD64. See the current snippet
below from configure.ac
if test "x$enable_gallium_llvm" = xauto; then
case "$host_cpu" in
i*86|x86_64|amd64) enable_gallium_llvm=yes;;
esac
fi
Tests I did:
- I hacked the configure.ac to always set enable_gallium_llvm=yes and was able
to get the gallium r600 driver to build and subsquently mesa.
- I, somewhat stupidly, tested --with-dri-drivers=nouveau and not
--with-gallium-drivers=nouveau because I dont care about the drivers - I will
end up using Freescale/Vivante drivers. BUT - can the two be aligned or at
least checked for inconsistencies.
Questions:
- Does it make sense to migrate the default to use LLVM for ARM platforms?
At the end of the day I didnt really care about the drivers themselves because
I will be dropping in Vivante drivers via Freescale, but I needed mesa/gallium
to build. I should have cut the gallium drivers out, but I was concerned I had
my build environment/paths setup correctly.
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