On Mon, 27 May 2002, David Woodhouse wrote:
> jamagallon@able.es said:
> > +CFLAGS += $(shell if $(CC) -march=pentium-mmx -S -o /dev/null -xc /
> > dev/null >/dev/null 2>&1; then echo "-march=pentium-mmx"; else echo
> > "-march=i586"; fi)
>
> Doesn't this run the shell command every time $(CFLAGS) is used?
CFLAGS is initially defined with ':=', which, as opposed to '=' means to
evaluate directly and store the resulting string, so it should be fine.
Even if it wasn't, only the evaluations from the top-level Makefile would
cause the command to be executed, make will always pass down the evaluated
result to the subdir makes.
--Kai
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This archive was generated by hypermail 2b29 : Fri May 31 2002 - 22:00:20 EST