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Tim Northover 77d82202d1 [mach-o]: support -syslibroot and -l options 
These behave slightly idiosyncratically in the best of cases, and have
additional hacks layered on top of that for compatibility with badly behaved
build systems (via ld64).

For -lXYZ:
  + If XYZ is actually XY.o then search all library paths for XY.o
  + Otherwise search all library paths, first for libXYZ.dylib, then libXYZ.a
  + By default the library paths are /usr/lib and /usr/local/lib in that order.

For -syslibroot:
  + -syslibroot options apply to absolute paths in the search order.
  + All -syslibroot prefixes that exist are added to the search path *instead*
    of the original.
  + If no -syslibroot prefixed path exists, the original is kept.
  + Hacks^WExceptions:
      + If only 1 -syslibroot is given and doesn't contain /usr/lib or
        /usr/local/lib, that path is dropped entirely. (rdar://problem/6438270).
      + If the last -syslibroot is "/", all of them are ignored entirely.
        (rdar://problem/5829579).

At least, that's my best interpretation of what ld64 does in buildSearchPaths.

llvm-svn: 212706
 		2014-07-10 11:21:06 +00:00
..
cmake/modules Add VTune as an optional external dependency and add task tracking. 2013-04-06 00:56:40 +00:00
docs Remove group-parent references. 2014-06-03 03:07:49 +00:00
include [mach-o]: support -syslibroot and -l options 2014-07-10 11:21:06 +00:00
lib [mach-o]: support -syslibroot and -l options 2014-07-10 11:21:06 +00:00
test [mach-o]: support -syslibroot and -l options 2014-07-10 11:21:06 +00:00
tools Initial set of Makefiles 2014-06-04 09:54:07 +00:00
unittests Update for llvm api change. 2014-07-06 17:43:22 +00:00
utils Update for llvm api change. 2014-07-06 17:43:22 +00:00
.arcconfig Update Phabricator server. 2014-04-07 04:52:24 +00:00
.clang-format Remove redundant "Standard: Cpp11" tag. The LLVM style has used the 2014-07-04 12:08:03 +00:00
.gitignore docs: Sketch Sphinx based docs structure. 2012-04-06 21:02:20 +00:00
CMakeLists.txt Add support for building Sphinx documentation when being built inside LLVM source tree and using CMake. 2014-04-18 21:59:05 +00:00
LICENSE.TXT Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
Makefile Initial set of Makefiles 2014-06-04 09:54:07 +00:00
README.md Test commit 2012-09-14 00:00:39 +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.