K 10
svn:author
V 8
bdrewery
K 8
svn:date
V 27
2015-12-07T16:08:16.975252Z
K 7
svn:log
V 815
FAST_DEPEND: Only try to use dependencies from C/C++ SRCS as mkdep did.

Rather than try to guess at all of the OBJS variables just use SRCS
using the same patterns that mkdep does.  This also fixes a mistake
where dependencies were being generated with FAST_DEPEND when they were
not for mkdep.  This happens when OBJS!=SRCS as is the case in
gnu/lib/csu where SRCS has 1 file and OBJS has several other files that
does not even contain the 1 SRCS file.  Generally in these cases the
OBJS have custom dependencies defined in their Makefile.  If we generate
dependencies for those and then load a .depend file, then .IMPSRC may
contain duplicate sources and lead to errors such as:
  cc: error: cannot specify -o when generating multiple output files

MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division

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