Makefile: avoid infinite loop on configure.ac change

diff --git a/Makefile b/Makefile
index 8dc2dbc2eeae18b67a5af5322e5c86c8bb102c18..b51b564162ee042bf1e4a96cf84e1fe730d32923 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -2159,12 +2159,14 @@ $(patsubst %.py,%,$(SCRIPT_PYTHON)): % : unimplemented.sh
        mv $@+ $@
 endif # NO_PYTHON
 
+CONFIGURE_RECIPE = $(RM) configure configure.ac+ && \
+                  sed -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
+                       configure.ac >configure.ac+ && \
+                  autoconf -o configure configure.ac+ && \
+                  $(RM) configure.ac+
+
 configure: configure.ac GIT-VERSION-FILE
-       $(QUIET_GEN)$(RM) $@ $<+ && \
-       sed -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
-           $< > $<+ && \
-       autoconf -o $@ $<+ && \
-       $(RM) $<+
+       $(QUIET_GEN)$(CONFIGURE_RECIPE)
 
 ifdef AUTOCONFIGURED
 # We avoid depending on 'configure' here, because it gets rebuilt
@@ -2173,7 +2175,7 @@ ifdef AUTOCONFIGURED
 # do want to recheck when the platform/environment detection logic
 # changes, hence this depends on configure.ac.
 config.status: configure.ac
-       $(QUIET_GEN)$(MAKE) configure && \
+       $(QUIET_GEN)$(CONFIGURE_RECIPE) && \
        if test -f config.status; then \
          ./config.status --recheck; \
        else \