Mark Therieau wrote:
>
> I'm trying to create an output file that
> has one filename per line. (I need to feed
> the filenames to the shell one at a time to
> avoid win32 command-line length issues when
> dealing with hundreds/thousands of files)
>
> The makefile below doesn't work because the
> foreach is evaluated *before* the rm command is
> executed. The result is that the "shell echo"
> commands run first to create "c.pfs" and then
> the rm deletes it every time.
>
> Any ideas on a better way to get the rules to
> run in the desired order?
>
> ---------------------------------------------
> CSRCS = file1.c file2.c file999.c file1000.c
> c.pfs:
> @rm -f $@
> @$(foreach f,$(CSRCS),$(shell echo $(f) >> $@))
> ------------------------
I think each line of the command is spawned as a separate
shell process. Try to keep all the commands in one line
(one process):
CSRCS = file1.c file2.c file999.c file1000.c
c.pfs:
@rm -f $@ ; \
$(foreach f,$(CSRCS),$(shell echo $(f) >> $@))
or:
@rm -f $@ && \
$(foreach f,$(CSRCS),$(shell echo $(f) >> $@))
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