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11f403cf2b
having a library both as bitcode and native code. We want to use the bitcode first, but if codegen produces new undefined references we have to use the native code to satisfy those references. Gold has no notion of bitcode and native search directories, so instead it has an API where the plugin can instruct it to look for the libraries it is passing to it. This patch uses that API. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106674 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| .. | ||
| gold-plugin.cpp | ||
| gold.exports | ||
| Makefile | ||
| 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.