[LLVMdev] problem on clang+gold

[Sebastian Pop]

Hi Guoliang,

On Wed, May 23, 2012 at 1:58 AM, Guoliang Jin <jingl1345 at gmail.com> wrote:
> Hi there,
>
> I compiled clang+gold using a gcc under path /s/gcc-4.3.1/bin/. Later on
> I do configure and make for flex-2.5.35, and the following command is
> invoked:
> "/path/to/my/gold/ld" --hash-style=gnu --no-add-needed --eh-frame-hdr -m
> elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o flex
> /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crt1.o
> /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crti.o
> /usr/lib/gcc/i386-redhat-linux/4.1.2/crtbegin.o
> -L/usr/lib/gcc/i386-redhat-linux/4.1.2
> -L/usr/lib/gcc/i386-redhat-linux/4.1.2/../../.. -L/lib -L/usr/lib
> -plugin /path/to/my/llvm/../lib/LLVMgold.so -plugin-opt=also-emit-llvm
> 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 -L /s/gcc-4.3.1/lib -lgcc
> --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s
> --no-as-needed /usr/lib/gcc/i386-redhat-linux/4.1.2/crtend.o
> /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../crtn.o
>
> and got errors like:
> /path/to/my/gold/ld: error: dfa.o: multiple definition of 'vprintf'
> /path/to/my/gold/ld: ccl.o: previous definition here
> /path/to/my/gold/ld: error: dfa.o: multiple definition of 'getchar'
> /path/to/my/gold/ld: ccl.o: previous definition here
> ...
>
> The problem to me is that clang should really pick the library under
> /s/gcc-4.3.1/lib rather the one under /usr/lib/gcc.
>
> Is this a bug that clang does not pick the correct library path? Any
> ways to fix this?

You can configure llvm with the flag --with-gcc-toolchain=/s/gcc-4.3.1/

Sebastian
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