Re: [PATCH 2/2] kbuild: add shell cache

[Jim Davis]

On Mon, Jun 27, 2016 at 11:28 AM, Rabin Vincent <rabin@xxxxxx> wrote:
> Running make results in over 40 invocations of the compiler just during
> processing of the Makefile, before any actual rules are run.
>
> To reduce this overhead, cache the results of $(shell) calls to the
> compiler.

Clever.   Looks like lisp with all those parens!

One quirk with distclean:

jim@krebstar:~/linux-rc$ make defconfig >/dev/null
jim@krebstar:~/linux-rc$ ls -la .shellcache
-rw-rw-r-- 1 jim jim 7876 Jun 29 09:51 .shellcache
jim@krebstar:~/linux-rc$ make distclean | grep '\.shellcache'
  CLEAN   .shellcache
jim@krebstar:~/linux-rc$ ls -la .shellcache
-rw-rw-r-- 1 jim jim 1061 Jun 29 09:52 .shellcache

-- 
Jim