Dimitry Andric 07b202a847 Define several extra macros in bsd.sys.mk and sys/conf/kern.pre.mk, to
get rid of testing explicitly for clang (using ${CC:T:Mclang}) in
individual Makefiles.

Instead, use the following extra macros, for use with clang:
- NO_WERROR.clang       (disables -Werror)
- NO_WCAST_ALIGN.clang  (disables -Wcast-align)
- NO_WFORMAT.clang	(disables -Wformat and friends)
- CLANG_NO_IAS		(disables integrated assembler)
- CLANG_OPT_SMALL	(adds flags for extra small size optimizations)

As a side effect, this enables setting CC/CXX/CPP in src.conf instead of
make.conf!  For clang, use the following:

CC=clang
CXX=clang++
CPP=clang-cpp

MFC after:	2 weeks
2012-02-28 18:30:18 +00:00
..
2012-01-06 15:01:05 +00:00
2012-01-07 16:09:33 +00:00
2012-01-07 16:09:33 +00:00
2011-12-26 16:47:45 +00:00
2011-11-07 07:50:35 +00:00
2011-11-06 20:39:35 +00:00
2011-11-09 21:01:50 +00:00
2012-02-11 16:41:52 +00:00
2012-02-25 15:21:43 +00:00
2012-01-07 16:09:33 +00:00
2012-01-28 13:41:34 +00:00
2010-03-10 18:51:13 +00:00
2010-06-20 12:52:33 +00:00
2012-02-07 14:06:30 +00:00
2012-01-13 06:56:59 +00:00
2011-06-24 07:29:04 +00:00
2011-06-02 09:56:42 +00:00