K 10
svn:author
V 11
arichardson
K 8
svn:date
V 27
2020-07-15T12:07:47.910934Z
K 7
svn:log
V 337
Avoid rebuilding libpmc in every incremental rebuild

Generate libpmc_events.c in a temporary file first and only overwrite it
if the files are actually different.
This avoids compiling and relinking the different variants of libpmc on
every incremental build.

Reviewed By:	jhb
Differential Revision: https://reviews.freebsd.org/D24784

END