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hanchenye-llvm-project/lld
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Fangrui Song 8f089f2099 [MC] Emit unused undefined symbol even if its binding is not set 
Recommit r373168, which was reverted by r373242. This actually exposed a
boringssl bug which has been fixed for more than one month.

For the following two cases, we currently suppress the symbols. This
patch emits them (compatible with GNU as).

* `test2_a = undef`: if `undef` is otherwise unused.
* `.hidden hidden`: if `hidden` is unused. This is the main point of the
  patch, because omitting the symbol would cause a linker semantic
  difference.

It causes a behavior change that is not compatible with GNU as:

.weakref foo1, bar1

When neither foo1 nor bar1 is used, we now emit bar1, which is arguably
more consistent.

Another change is that we will emit .TOC. for .TOC.@tocbase .  For this
directive, suppressing .TOC. can be seen as a size optimization, but we
choose to drop it for simplicity and consistency.
 		2019-11-08 14:47:48 -08:00
..
COFF Warn when an output section name is longer than 8 characters 2019-11-01 12:59:13 -07:00
Common [LLD] Move duplicated dwarf parsing code to the Common library. NFC. 2019-10-21 08:01:52 +00:00
ELF [ELF] Fix stack-use-after-scope after D69592 and 69650 2019-11-08 11:21:32 -08:00
MinGW Use error instead of fatal to report usage errors 2019-10-10 09:46:41 +00:00
cmake/modules
…
docs [lld] [ELF] Add '-z nognustack' opt to suppress emitting PT_GNU_STACK 2019-10-29 17:54:23 +01:00
include/lld typo fix test commit 2019-10-22 21:32:11 +00:00
lib Move endian constant from Host.h to SwapByteOrder.h, prune include 2019-10-19 00:48:11 +00:00
test [MC] Emit unused undefined symbol even if its binding is not set 2019-11-08 14:47:48 -08:00
tools/lld Move endian constant from Host.h to SwapByteOrder.h, prune include 2019-10-19 00:48:11 +00:00
unittests Update the file headers across all of the LLVM projects in the monorepo 2019-01-19 08:50:56 +00:00
utils Python 2/3 compatibility 2019-03-20 07:42:13 +00:00
wasm [WebAssembly][lld] Fix for static linking of PIC code 2019-10-29 18:58:56 -07:00
.arcconfig
…
.clang-format
…
.gitignore
…
CMakeLists.txt [CMake] Don't set Python_ADDITIONAL_VERSIONS 2019-07-18 15:17:42 +00:00
CODE_OWNERS.TXT
…
LICENSE.TXT Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
README.md
…

README.md

LLVM Linker (lld)

This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.

lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Benchmarking

In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.

It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz

The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.