Messages in this thread | | | From | Keith Owens <> | Subject | Re: CCFOUND and more | Date | Thu, 28 Dec 2000 15:22:59 +1100 |
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On Tue, 26 Dec 2000 21:11:14 +0100, "J . A . Magallon" <jamagallon@able.es> wrote: >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. > >Is there something I am missing ?
Yes. Some arch files change CROSS_COMPILE after CC has been set and expect the change to flow into the definition of CC. This "feature" only works because '=' stores the value as text and reevaluates the text each time, automatically picking up any changes to CROSS_COMPILE. Using CC := might break m68k and mips. The makefile redesign for 2.5 will fix this problem once and for all.
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