Linking to LLVMOProfileJIT

[pwuertz]

Compiling the current llvmlite on Ubuntu 15.10 using the llvm 3.7 packages from the standard repository fails due to a hardcoded linkage to LLVMOProfileJIT. This library doesn't exist on the system. After removing the link from Makefile.linux llvmlite builds and runs without problems.

[mschubert]

same on Archlinux

[navreetaft]

Reported it @ https://lists.alioth.debian.org/pipermail/pkg-llvm-team/2016-March/005549.html

[pitrou]

Also see previous reports at #100 (comment)

[pitrou]

Also, upstream issue (explaining the hardcoded linkage) at https://llvm.org/bugs/show_bug.cgi?id=25091

[pwuertz]

Is there a possible workaround for determining if llvm is built with oprofile support or not?
@pitrou: Does oprofile show up in llvm-config --components for you?
Maybe enable the flag after checking for LLVMOProfileJIT files in llvm-config --libdir?

[pitrou]

Yes, oprofilejit shows up in llvm-config --components.

[pwuertz]

Maybe the problem is in build.py where only a subset of --libs is requested? Maybe a plain llvm-config --libs indeed includes LLVMOProfileJIT as it should (ignoring the extra gtest you reported)?

[pitrou]

Thanks for suggesting that. It seems that llvm-config doesn't have the bugs it used to have anymore, so perhaps we can use --libs all again. I'll take a look a bit later.