[LLVMdev] gold and debug information

[Jin Guoliang]

On Tue, Jul 20, 2010 at 8:49 AM, Rafael Espindola <espindola at google.com>wrote:

> > export PATH="$LLVMPREFIX/bin:$LLVMGCCPREFIX/bin:$PATH"
> > export CC="llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm"
> > export CXX="llvm-g++ -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm"
> > export RANLIB=/bin/true
> > export CFLAGS="-O4 -g"
> >
> > then configure, make, and then hit the error.
> >
> > The error only happens if the CFLAGS has -g in it.
>
> Can you reduce the testcase a bit? It would be a lot easier to
> reproduce with the ld invocation and the .o files given to it.
>
> All the .o files are in the tarball. You can download it here (too large to
send through the list):
http://pages.cs.wisc.edu/~aliang/goldAndDebugTest.tar.gz

The command is:
llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-
llvm  -g -O4   -o flex  ccl.o dfa.o ecs.o scanflags.o gen.o main.o misc.o
nfa.o parse.o scan.o skel.o sym.o tblcmp.o yylex.o options.o scanopt.o buf.o
tables.o tables_shared.o filter.o regex.o  -lm
Then I got:
$ llvm-gcc -use-gold-plugin -Wl,-plugin-opt=also-emit-llvm  -g -O4   -o
flex  ccl.o dfa.o ecs.o scanflags.o gen.o main.o misc.o nfa.o parse.o scan.o
skel.o sym.o tblcmp.o yylex.o options.o scanopt.o buf.o tables.o
tables_shared.o filter.o regex.o  -lm
collect2: ld terminated with signal 6 [Aborted]
/local.toadette/aliang/packages/llvm-2.7/llvm-gcc/lib/gcc/i686-pc-linux-gnu/4.2.1/../../../../i686-pc-linux-gnu/bin/ld:
error: buf.o:1:1: invalid character

Unknown constant!
UNREACHABLE executed at
/local.toadette/aliang/fixing/llvm-2.7/llvm-2.7/lib/Bitcode/Writer/BitcodeWriter.cpp:895!

I do not know how to get the ld invocation you need. If this command is not
what you need, please tell me how to get the ld invocation.

Thanks,
Guoliang
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