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Shoaib Meenai 0c958fba14 [ELF] Only scan executables for shlib undefined symbols 
If using a version script with a `local: *` in it, symbols in shared
libraries will still get default visibility if another shared library on
the link line has an undefined reference to the symbol. This is quite
surprising. Neither bfd nor gold have this behavior when linking a
shared library, and none of LLD's tests fail without this behavior, so
it seems safe to limit scanShlibUndefined to executables.

As far as executables are concerned, gold doesn't do any automatic
default visibility marking, and bfd issues a link error about a shared
library having a reference to a hidden symbol rather than silently
giving that symbol default visibility. I think bfd's behavior here is
preferable to LLD's, but that's something to be considered in a
follow-up.

Differential Revision: https://reviews.llvm.org/D41524

llvm-svn: 321578
 		2017-12-30 08:00:44 +00:00
..
COFF Do not parse the same /export string more than once. 2017-12-28 07:41:19 +00:00
Common Add a missing build dependency. 2017-12-14 22:31:29 +00:00
ELF [ELF] Only scan executables for shlib undefined symbols 2017-12-30 08:00:44 +00:00
MinGW [MinGW] Ignore the --no-seh flag 2017-12-15 20:53:10 +00:00
cmake/modules [lld] Switch to add_llvm_install_targets 2017-12-01 04:17:45 +00:00
docs [docs] Update doc building instructions 2017-12-05 23:31:26 +00:00
include/lld Prefer `ArrayRef` over `const std::vector&` 2017-12-08 01:09:21 +00:00
lib [YAML] Fix mustQuote return type changed in r320996 2017-12-18 17:49:27 +00:00
test [ELF] Only scan executables for shlib undefined symbols 2017-12-30 08:00:44 +00:00
tools/lld [CMake] Use PRIVATE in target_link_libraries for executables 2017-12-05 21:49:56 +00:00
unittests [CMake] Use PRIVATE in target_link_libraries for executables 2017-12-05 21:49:56 +00:00
utils Add a script to run various benchmarks and send the result to lnt. 2017-11-14 16:40:30 +00:00
wasm [WebAssmebly] Fix references to weak aliases 2017-12-21 02:43:39 +00:00
.arcconfig [lld] Set up .arcconfig to point to new Diffusion LLD repository 2017-12-06 20:56:23 +00:00
.clang-format
…
.gitignore
…
CMakeLists.txt [WebAssembly] Initial wasm linker implementation 2017-11-17 18:14:09 +00:00
CODE_OWNERS.TXT [WebAssembly] Initial wasm linker implementation 2017-11-17 18:14:09 +00:00
LICENSE.TXT Update copyright year to 2016. 2016-03-30 22:40:59 +00:00
README.md Note that the test .tar.xz has been updated. 2017-12-22 19:37:32 +00:00

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.