llvm-project

History

Nick Lewycky 5eb3773b99 Force 'llvm-config' to go first, optionally followed by lto and gold mixed in with the rest of the parallel directories. Build lto when possible on all platforms. Make gold to explicitly depend on libLTO. llvm-svn: 65518		2009-02-26 07:56:49 +00:00
..
Makefile	Force 'llvm-config' to go first, optionally followed by lto and gold mixed in	2009-02-26 07:56:49 +00:00
README.txt	mention that PIC is needed for libLTO and libLLVMgold	2009-02-04 19:12:25 +00:00
gold-plugin.cpp	Add an option to the gold plugin to make it emit a file with the public api	2009-02-22 22:15:44 +00:00

README.txt

This directory contains a plugin that is designed to work with binutils
gold linker. At present time, this is not the default linker in
binutils, and the default build of gold does not support plugins.

Obtaining binutils:

  cvs -z 9 -d :pserver:anoncvs@sourceware.org:/cvs/src login
  {enter "anoncvs" as the password}
  cvs -z 9 -d :pserver:anoncvs@sourceware.org:/cvs/src co binutils

This will create a src/ directory. Make a build/ directory and from
there configure binutils with "../src/configure --enable-gold --enable-plugins".
Then build binutils with "make all-gold".

To build the LLVMgold plugin, configure LLVM with the option
--with-binutils-include=/path/to/binutils/src/include/ --enable-pic. To use the
plugin, run "ld-new --plugin /path/to/libLLVMgold.so".
Without PIC libLTO and libLLVMgold are not being built (because they would fail
link on x86-64 with a relocation error: PIC and non-PIC can't be combined).
As an alternative to passing --enable-pic, you can use 'make ENABLE_PIC=1' in
your entire LLVM build.