[U-Boot] [PATCH 1/2] common: Add CCACHE variable to allow use of ccache
Marek Vasut
marex at denx.de
Tue May 21 17:04:53 CEST 2013
Dear Wolfgang Denk,
> Dear Marek Vasut,
>
> In message <1369070715-9585-2-git-send-email-marex at denx.de> you wrote:
> > Prefix HOSTCC and CC with CCACHE variable to allow easy use of ccache.
> > In case the user wants to use ccache, exporting CCACHE=ccache will do
> > the trick. It is of course possible to either make the cross-compiler
> > name into a shellscript which invokes the ccache and the compiler, but
> > setting this variable makes use of ccache easier and more convenient.
>
> ...
>
> > -AS = $(CROSS_COMPILE)as
> > +AS = $(CCACHE) $(CROSS_COMPILE)as
> >
> > # Always use GNU ld
> > LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
> >
> > then echo "$(CROSS_COMPILE)ld.bfd"; else echo
"$(CROSS_COMPILE)ld";
> > fi;)
> >
> > -CC = $(CROSS_COMPILE)gcc
> > +CC = $(CCACHE) $(CROSS_COMPILE)gcc
> >
> > CPP = $(CC) -E
>
> Why not for CPP ?
CPP is invoked via $(CC) -E and CCACHE is set for CC right above, so that'd call
ccache twice.
Best regards,
Marek Vasut
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