Dear Sam, You never answered my latest questions!! Does this rule have a recipe?!!: main.o main.d : main.c defs.h
On 12/6/10, Sam Ravnborg <[email protected]> wrote: > On Mon, Dec 06, 2010 at 11:02:38AM +0330, ali hagigat wrote: >> In section 4.13, we have the following example: >> ---------------------------------------------------------- >> %.d: %.c >> @set -e; rm -f $@; \ >> $(CC) -M $(CPPFLAGS) $< > $...@.$$$$; \ >> sed ’s,\($*\)\.o[ :]*,\1.o $@ : ,g’ < $...@.$$$$ > $@; \ >> rm -f $...@.$$$$ >> ---------------------------------------------------------- >> Under what conditions this implicit rule is executed? >> Would you please give an example? >> >> Why the 'sed' command is necessary? and why we need to have the following >> rule: >> main.o main.d : main.c defs.h >> Can the command, 'sed' be replaced with: >> cp $...@.$$$$ $@ >> (I mean we have one .d file for each .c file and it will be included, >> why we need a rule like main.d : main.c defs.h? This rule is without >> recipe and what is it supposed to do?) > > Sorry Ali. > I have tried to explain things but obvioulsy without luck. > Please go ahead and try out the things described - and _then_ ask questions. > I guess you would then figure out that the above has a receipe, > the purpose of sed etc. > > Until then, > > Sam > _______________________________________________ Help-make mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-make
