[Mesa-dev] [Bug 49504] New: [Bisected] Mesa master compilation broke when built with --with-llvm-shared-libs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49504

             Bug #: 49504
           Summary: [Bisected] Mesa master compilation broke when built
                    with --with-llvm-shared-libs
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Mesa core
        AssignedTo: mesa-dev at lists.freedesktop.org
        ReportedBy: sarvatt at gmail.com


Building mesa master fails when --with--llvm-shared-libs is used like so:

g++  -L/usr/lib/llvm-3.0/lib  -lpthread -lffi -ldl -lm  lp_test_round.o
lp_test_main.o -o lp_test_round -Wl,--start-group  -L../../auxiliary/ -lgallium
libllvmpipe.a -lLLVM-3.0  -lXext -lXdamage -lXfixes -lX11-xcb -lX11 -lxcb-glx
-lxcb -lXxf86vm   -ldrm   -lm -lpthread -ldl -Wl,--end-group
/usr/bin/ld: ../../auxiliary//libgallium.a(u_dl.o): undefined reference to
symbol 'dlopen@@GLIBC_2.1'
/usr/bin/ld: note: 'dlopen@@GLIBC_2.1' is defined in DSO
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/libdl.so so try adding
it to the linker command line
/usr/lib/gcc/i686-linux-gnu/4.6/../../../i386-linux-gnu/libdl.so: could not
read symbols: Invalid operation
collect2: ld returned 1 exit status
make[4]: *** [lp_test_blend] Error 1
make[4]: *** Waiting for unfinished jobs....
make[4]: Leaving directory `/home/sarvatt/mesa/src/gallium/drivers/llvmpipe'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/sarvatt/mesa/src/gallium/drivers'
make[2]: *** [default] Error 1
make[2]: Leaving directory `/home/sarvatt/mesa/src/gallium'
make[1]: *** [subdirs] Error 1
make[1]: Leaving directory `/home/sarvatt/mesa/src'
make: *** [default] Error 1


I bisected it down to this commit

0b0f4628d6fb8276a9f1c336a785a838b602bca8 is the first bad commit
commit 0b0f4628d6fb8276a9f1c336a785a838b602bca8
Author: James Benton <jbenton at vmware.com>
Date:   Wed Apr 18 15:25:34 2012 +0100

    llvmpipe: Added support for color masks in AoS blending.

    Signed-off-by: José Fonseca <jfonseca at vmware.com>

:040000 040000 5521841f3b528eac2ae62ed61eb43c7ffed7f3c9
816e632242eccd9401f90212dfd2332c678999ce M    src

Full bisect log:

git bisect start
# good: [2d75a1e25e6ddcd65964d30fc3c782df2e880cc4] glsl: Initialize member
variable in ir_copy_propagation_elements_visitor.
git bisect good 2d75a1e25e6ddcd65964d30fc3c782df2e880cc4
# bad: [51691f0767f6a75a1f549cd979a878a0ad12a228] darwin: Use ASL for logging
git bisect bad 51691f0767f6a75a1f549cd979a878a0ad12a228
# bad: [6cd76b800bed70435f499c6c498a487a5056a731] gallivm: Add a
lp_build_const_func_pointer() helper.
git bisect bad 6cd76b800bed70435f499c6c498a487a5056a731
# good: [6d5efe96ee710ca1dd5f745f74a5bbfa4fd42fd9] dri/nouveau: Add general
support for compressed formats.
git bisect good 6d5efe96ee710ca1dd5f745f74a5bbfa4fd42fd9
# bad: [9bc58d941ac32d10c6b4c601e0c4c6e00876d738] llvmpipe: Check when a shader
does not satisfy 0 < imm < 1.
git bisect bad 9bc58d941ac32d10c6b4c601e0c4c6e00876d738
# good: [85d09d1c61d3e5ab2c2ae6fc74a30ea6a572f25e] gallivm: added aligned
pointer get/set
git bisect good 85d09d1c61d3e5ab2c2ae6fc74a30ea6a572f25e
# bad: [c426e63aa064debc23f9819c3862f357f1726bce] gallivm: fixed memory leak in
lp_build_tgsi_aos
git bisect bad c426e63aa064debc23f9819c3862f357f1726bce
# bad: [0b0f4628d6fb8276a9f1c336a785a838b602bca8] llvmpipe: Added support for
color masks in AoS blending.
git bisect bad 0b0f4628d6fb8276a9f1c336a785a838b602bca8

Options used:
./autogen.sh --with-driver=dri --with-dri-drivers=" r200 radeon nouveau i915
i965" --with-dri-driverdir=/usr/lib/x86_64-linux-gnu/dri --enable-glx-tls
--enable-shared-dricore --enable-shared-glapi --enable-texture-float
--with-llvm-shared-libs --enable-xa --enable-driglx-direct
--with-egl-platforms="x11 drm wayland" --enable-gallium-llvm
--with-gallium-drivers=" nouveau r600 r300 svga swrast" --enable-gles1
--enable-gles2 --enable-openvg --enable-gallium-egl --disable-glu CFLAGS="-Wall
-g -O2" CXXFLAGS="-Wall -g -O2"

Dropping --with-llvm-shared-libs does work.

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