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rules.mk: make sure we always create a .depend file

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There are some cases where "make depend" would always run when
entering a directory.  This happened when both the $(SRCS) and
$(HOSTSRCS) lists were empty (which is for example typical for the
examples/api/ directory).  Avoid this by making sure that a ".depend"
file gets always created, even if empty.

Signed-off-by: Wolfgang Denk <wd@denx.de>
Acked-by: Detlev Zundel <dzu@denx.de>
This commit is contained in:
Wolfgang Denk 2010-10-05 14:08:55 +02:00
parent d628866474
commit b15fbd4996
1 changed files with 1 additions and 0 deletions
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rules.mk
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@ -27,6 +27,7 @@ _depend: $(obj).depend
$(obj).depend: $(src)Makefile $(TOPDIR)/config.mk $(SRCS) $(HOSTSRCS)
@rm -f $@
@touch $@
@for f in $(SRCS); do \
g=`basename $$f | sed -e 's/\(.*\)\.\w/\1.o/'`; \
$(CC) -M $(CPPFLAGS) -MQ $(obj)$$g $$f >> $@ ; \