+check: all
+ rm -rf _check
+ mkdir _check
+ cd _check && ../configure $(CONFIGUREFLAGS)
+ cd _check && make distcheck
+ rm -rf _check
+
+_build: all
+ test -d _build || mkdir _build
+ cd _build && ../configure $(CONFIGUREFLAGS)
+
+_debug: all
+ test -d _debug || mkdir _debug
+ cd _debug && ../configure $(CONFIGUREFLAGS) --enable-debug
+