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llvm-mirror/tools/gold
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Fangrui Song 272e73d284 [LLVMgold.so] -plugin-opt=save-temps: save combined module to .lto.o instead of .o 
This matches LLD and fixes https://sourceware.org/bugzilla/show_bug.cgi?id=26262#c1

.o is a bad choice for save-temps output because it is easy to override the bitcode file (*.o)

```
 # Use bfd for the example, -fuse-ld=gold is similar.
clang -flto -c a.c  # generate bitcode file a.o
clang -fuse-ld=bfd -flto a.o -o a -Wl,-plugin-opt=save-temps  # override a.o

 # The user repeats the command but get surprised, because a.o is now a combined module.
clang -fuse-ld=bfd -flto a.o -o a -Wl,-plugin-opt=save-temps
```

Reviewed By: tejohnson

Differential Revision: https://reviews.llvm.org/D84132

(cherry picked from commit 55fa315b0352b63454206600d6803fafacb42d5e)
2020-07-21 10:20:50 -07:00
..
CMakeLists.txt cmake: Remove add_llvm_loadable_module() 2018-12-20 22:04:08 +00:00
gold-plugin.cpp [LLVMgold.so] -plugin-opt=save-temps: save combined module to .lto.o instead of .o 2020-07-21 10:20:50 -07:00
gold.exports
README.txt

README.txt 

The LLVM Gold LTO Plugin
========================

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.

See docs/GoldPlugin.html for complete build and usage instructions.

NOTE: libLTO and LLVMgold aren't built without PIC because they would fail
to 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.