[llvm-bugs] [Bug 38303] New: ARM_V4BX relocation is not supported

via llvm-bugs llvm-bugs at lists.llvm.org
Tue Jul 24 22:41:49 PDT 2018


            Bug ID: 38303
           Summary: ARM_V4BX relocation is not supported
           Product: lld
           Version: unspecified
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: ELF
          Assignee: unassignedbugs at nondot.org
          Reporter: mh+llvm at glandium.org
                CC: llvm-bugs at lists.llvm.org

Building Firefox for Android with lld fails with multiple errors like:

/builds/worker/workspace/build/src/clang/bin/ld.lld: error: can't create
dynamic relocation R_ARM_V4BX against local symbol in readonly segment;
recompile object files with -fPIC
>>> defined in ../../gfx/cairo/libpixman/src/pixman-arm-neon-asm-bilinear.o
>>> referenced by ../../gfx/cairo/libpixman/src/pixman-arm-neon-asm-bilinear.o:(.text+0x4F0)

which doesn't actually say it's not supported, but considering R_ARM_V4BX is
not an actual relocation, and wouldn't imply a dynamic text relocation if it
were supported, the error is actually bogus.

Linking with -z notext is more explicit:

/builds/worker/workspace/build/src/clang/bin/ld.lld: error:
unrecognized reloc 40

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