[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [XEN PATCH v3 19/23] xen/build: Use if_changed_rules with %.o:%.c targets
On Wed, Mar 04, 2020 at 05:09:19PM +0100, Jan Beulich wrote: > On 26.02.2020 12:33, Anthony PERARD wrote: > > +define rule_cc_o_c > > + $(call cmd_and_record,cc_o_c) > > + $(call cmd,objcopy_fix_sym) > > The machinery is resilient to a command (here: cmd_objcopy_fix_sym) > not being defined, and will neither produce any undue output nor > else incur any unnecessary overhead? Yes, it's fine when cmd_objcopy_fix_sym isn't defined, nothing gets printed on the console, and there is no error. As for unnecessary overhead, I don't know. The macro still expand to "@set -e;". But Linux uses that a lot (having undefined cmd_*), so I guess it's not too bad. -- Anthony PERARD _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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