[llvm-dev] llvm-link has no --allow-multiple-definition
Marc via llvm-dev
llvm-dev at lists.llvm.org
Sun Mar 8 10:00:33 PDT 2020
I am developing an LTO instrumentation of programs for fuzzing (for
afl++) and I run into the following problem:
a lot of open source program have multiple definitons of the same
functions. In normal compile mode this is not a problem, however with
LTO this only works with the linker option:
Now to be able to instrument (it is an "opt" pass") at link time I need
to merge all bitcode files together, and this works great - unless I run
into this error when I link them to llvm-link:
error: Linking globals named 'process_arg': symbol multiply defined!
(this is for the bogofilter tools, but happens with other open source
My issue is that neither is --allow-multiple-definition an llvm-link
command line option, nor can I find an equivalent from the --help output.
is there a plan to add this (IMHO) important feature? Thank you!
PGP: AF3D 1D4C D810 F0BB 977D 3807 C7EE D0A0 6BE9 F573
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