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

[bugzilla-daemon at freedesktop.org]

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

--- Comment #5 from Thierry Reding <thierry.reding at avionic-design.de> 2012-01-13 06:41:16 PST ---
Now that Mesa actually builds past the src/glsl directory I get an internal
compiler error when building src/mesa/swrast/s_span.c. I was able to bisect
the ICE to this commit:

    3d7c5a4f6f4155e249f6eac76d861eb1bc59eb69

I'm cross-compiling for ARM and the ICE can be triggered by some combination
of optimization flags. I use this command line:

    (cd src/mesa && arm-none-linux-gnueabi-gcc -c -o swrast/s_span.o
swrast/s_span.c -DFEATURE_GL=1 -DFEATURE_ES1=1 -DFEATURE_ES2=1 -D_GNU_SOURCE
-DPTHREADS -DHAVE_POSIX_MEMALIGN -DUSE_XCB -DUSE_XSHM -DHAVE_MINCORE
-DHAVE_LIBUDEV -I../../include -I../../src/glsl -I../../src/mesa
-I../../src/mapi -I../../src/gallium/include -I../../src/gallium/auxiliary
-mlittle-endian -mapcs -mabi=aapcs-linux -g -O2 -marm -march=armv7-a
-mtune=cortex-a9 -mfpu=vfpv3-d16 -mfloat-abi=hard -Wall -Wmissing-prototypes
-std=c99 -ffast-math -fno-strict-aliasing -fno-builtin-memcmp -fPIC
-fvisibility=hidden -save-temps -v)

The error goes away if I, for instance, replace -O2 with -O1. It also goes
away if I drop either of the -mfloat-abi=hard or -mtune=cortex-a9 flags. I
was able to reproduce this with a number of CodeSourcery toolchains all the
way back until 2009q3. 2009q1 builds the file properly.

I guess I should be reporting that to GCC, right?

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