build-sys: fix rule for generating undefined list

diff --git a/Makefile.am b/Makefile.am
index a67f18b77a5eeb574bcb5dd9633ff0076f0d703d..dcc0a72d81c5a35eedc2ebe9fb7fc326f1e485fc 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -4587,7 +4587,7 @@ defined: $(ALL_OBJECTS)
                nm -g --undefined-only `echo $(builddir)/"$$f" | sed -e 's,\([^/]*\).lo$$,.libs/\1.o,'` ; \
        done | cut -c 20- | cut -d @ -f 1 | sort -u > $(builddir)/undefined
 
-undefined:
+undefined: $(ALL_OBJECTS)
        $(AM_V_GEN)for f in $(ALL_OBJECTS) ; do \
                nm -g --defined-only `echo $(builddir)/"$$f" | sed -e 's,\([^/]*\).lo$$,.libs/\1.o,'` ; \
        done | cut -c 20- | cut -d @ -f 1 | sort -u > $(builddir)/defined