build: fix generation of ChangeLog

[thirdparty/lldpd.git] / Makefile.am

diff --git a/Makefile.am b/Makefile.am
index e4b29a41c1ef271d1e02a02fc6375c1f7872b40f..d51087cacb3bc6d718bfcc0081c4228ad02e35ce 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,14 +8,11 @@ DIST_SUBDIRS = $(SUBDIRS) libevent
 
 dist_doc_DATA = README.md NEWS
 doc_DATA      = ChangeLog
-# If not present, just ship an empty one
-ChangeLog:
-       touch $@
 
-# Build changelog from git history
-dist-hook: $(distdir)/ChangeLog
-$(distdir)/ChangeLog:
-       if test -d $(top_srcdir)/.git; then \
+# Not able to add a .PHONY target
+force-changelog-generation:
+ChangeLog: force-changelog-generation
+       $(AM_V_GEN)if test -d $(top_srcdir)/.git; then \
                prev=$$(git describe --tags --always --match [0-9]* 2> /dev/null) ; \
                for tag in $$(git tag | grep -E '^[0-9]+(\.[0-9]+){1,}$$' | sort -rn); do \
                        if [ x"$$prev" = x ]; then prev=$$tag ; fi ; \
@@ -26,6 +23,8 @@ $(distdir)/ChangeLog:
                        echo "" ; \
                        prev=$$tag ; \
                done > $@ ; \
+       else \
+               touch $@ ; \
        fi
 
 MOSTLYCLEANFILES = $(DX_CLEANFILES)