Build failed with "undefined reference" GCC 4.6.1

[lht]

$ make
cfg: building on Linux x86_64
cfg: unix-y environment
cfg: using gcc
compile_and_link: stage1/rustc
/usr/bin/ld: stage1/rustc.o: undefined reference to symbol 'upcall_get_type_desc'
/usr/bin/ld: note: 'upcall_get_type_desc' is defined in DSO stage0/lib/librustrt.so so try adding it to the linker command line
stage0/lib/librustrt.so: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
error: linking with gcc failed with code 256
note: gcc arguments: -Lstage0/lib -Lrt -lrustrt stage0/lib/glue.o -m32 -o stage1/rustc stage1/rustc.o -Lstage0/lib -lstd -Lrustllvm -lrustllvm -lm stage0/lib/main.o
error: aborting due to previous errors

GCC- 4.6.1-9ubuntu2
GNU ld (GNU Binutils for Ubuntu) 2.21.53.20110810

[lht]

As a workaround, switching to the Gold linker solves the link error.

$ /usr/bin/ld.gold --version
GNU gold (GNU Binutils for Ubuntu 2.21.53.20110810) 1.11

[brson]

We should probably resolve this before Oneiric is released

[brson]

Putting this on the milestone list since Oneiric wil be out by the time we hit 0.1

[lht]

Commit e503710 works for me. Please take a look.

I haven't figured out how to build a stage0 by myself, but here is how I tested it.

$ make # with ld.gold
$ mv stage0 stage0.orig
$ cp -r stage1 stage0
$ touch stage0/lib/*
$ make # with ld.bfd
$ make check
0 failed.

[brson]

Fantastic! I've pushed this commit and added you to the AUTHORS.txt file. Thanks.