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qemu: delete rule target on error 

Instruct make to remove any rule target on error. This prevetns
situation where there was an error during build but generated file still
stays behind.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit 7dbbbb0c9e)
This commit is contained in:
Michael S. Tsirkin 2009-12-07 21:04:52 +02:00 committed by Anthony Liguori
parent 143d288cba
commit 90f445e1c9
1 changed files with 3 additions and 0 deletions
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3
rules.mak
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@ -47,3 +47,6 @@ cc-option = $(if $(shell $(CC) $1 $2 -S -o /dev/null -xc /dev/null \
%.h-timestamp: %.mak
$(call quiet-command, sh $(SRC_PATH)/create_config < $< > $@, " GEN $*.h")
@cmp $@ $*.h >/dev/null 2>&1 || cp $@ $*.h
# will delete the target of a rule if commands exit with a nonzero exit status
.DELETE_ON_ERROR: