[3.0 regression] llvm-ld can't find libc on debian testing

[llvmbot]

Bugzilla Link	11198
Resolution	FIXED
Resolved on	Nov 01, 2011 08:39
Version	unspecified
OS	Linux
Blocks	llvm/llvm-bugzilla-archive#11199
Reporter	LLVM Bugzilla Contributor
CC	@efriedma-quic,@nlewycky

Extended Description

Using this bitcode mn.ll

define i32 @​main() {
ret i32 0
}

$ llvm-ld mn.bc -lc
llvm-ld: error: Cannot find library 'c'

This breaks the nightly testsuite which invokes llvm-ld like this (i.e. passing
-lc).

Presumably this is because Debian has been moving its libraries to new locations.
The nightly testsuite can be "fixed" by adding
LLVMLD_FLAGS += -L/usr/lib/x86_64-linux-gnu/
to Makefile.programs

[efriedma-quic]

Is there any supported way to compute the correct library search path on Debian, besides "invoke gcc"?

[llvmbot]

Good question! There is a description of how things are set up here:
http://wiki.debian.org/Multiarch/LibraryPathOverview

[llvmbot]

Fixed by not passing -lc to llvm-ld, and indeed removing all uses of llvm-ld from
the testsuite:

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20111031/131007.html

[llvmbot]

mentioned in issue llvm/llvm-bugzilla-archive#11199