CCFOUND and more

From: J . A . Magallon (jamagallon@able.es)
Date: Tue Dec 26 2000 - 15:11:14 EST

Hi everyone.

Solving other things, I have realized that all that problem on fast
CC detection (CCFOUND) is easily solved by doing:
        CC := $(.................)
instead of
        CC = $(.........)
The find of the suitable CC command is repeated many times along a
kernel build. And CC is not anything that can change along a kernel
build. So former syntax solves all the problems, CC detection can
be so complex as you want because is done only once.

Same is valid for other Makefile variables:
CPP = $(CC) -E ===> CPP := $(CC) -E

(If you want to test how many shells are spawned when using CC, try
CC = $(shell echo "===== CC EVAL ===============" >&2; if ........
vs
CC := $(shell echo "===== CC EVAL ===============" >&2; if .......

Is there something I am missing ? 

-- 
J.A. Magallon                                         $> cd pub
mailto:jamagallon@able.es                             $> more beer

Linux werewolf 2.2.19-pre3-aa2 #9 SMP Tue Dec 26 12:26:43 CET 2000 i686

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