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Eric Fiselier d77135f828 [libcxx] Remove installation rules on Darwin when it would overwrite the system installation. 
Summary:
On Mac OS X overwriting `/usr/lib/libc++.dylib` can cause your computer to fail to boot. This patch tries to make it harder to do that accidentally. 

If `CMAKE_SYSTEM_NAME` is `Darwin` and `CMAKE_INSTALL_PREFIX` is `/usr` don't generate installation rules unless the user explicitly provides `LIBCXX_OVERRIDE_DARWIN_INSTALL=ON`. Note that `CMAKE_INSTALL_PREFIX` is always absolute so we don't need to worry about things like `/usr/../usr`.

Reviewers: mclow.lists, beanz, jroelofs

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D12209

llvm-svn: 246070
 		2015-08-26 20:18:21 +00:00
..
cmake [libcxx] Remove installation rules on Darwin when it would overwrite the system installation. 2015-08-26 20:18:21 +00:00
docs [libcxx] Add new Sphinx documentation 2015-08-22 19:40:49 +00:00
include [libcxx] Rewrite C++03 __invoke. 2015-08-26 20:15:02 +00:00
lib [libcxx] Remove installation rules on Darwin when it would overwrite the system installation. 2015-08-26 20:18:21 +00:00
src Fix a typo: overidden -> overridden - Patch from Kai Zhao 2015-08-20 05:23:16 +00:00
test [libcxx] Add special warning flag detection logic to compiler.py 2015-08-26 20:17:33 +00:00
utils cleanup comments in sym_check 2015-03-27 06:04:37 +00:00
www Update some links so that they don't point at the (private) WG21 Wiki 2015-08-05 14:36:42 +00:00
.arcconfig Update Arcanist config to point to reviews.llvm.org 2014-06-10 18:29:36 +00:00
.gitignore [libc++] Refactor test components into modules. 2015-01-09 18:03:29 +00:00
CMakeLists.txt [libcxx] Remove installation rules on Darwin when it would overwrite the system installation. 2015-08-26 20:18:21 +00:00
CREDITS.TXT Add self to CREDITS.txt 2015-02-26 00:48:22 +00:00
LICENSE.TXT Update copyright year to 2015. 2015-03-12 20:13:11 +00:00
Makefile Revert "Fix installheaders target's permissions" 2014-12-16 05:28:07 +00:00
TODO.TXT Add release goals to TODO.txt 2015-08-24 19:33:40 +00:00