Make sure to return an error if the file generation fails.

documentation/Makefile.in

diff --git a/documentation/Makefile.in b/documentation/Makefile.in
index 40db5bb..eb0f0b1 100644
--- a/documentation/Makefile.in
+++ b/documentation/Makefile.in
@@ -101,24 +101,24 @@
 winelib-user.pdf winelib-user.ps winelib-user/index.html: $(WINELIB_USER_SRCS)
 
 wine.man: wine.man.in
-	sed -e 's,@bindir\@,$(bindir),g' -e 's,@dlldir\@,$(dlldir),g' -e 's,@PACKAGE_STRING\@,@PACKAGE_STRING@,g' $(SRCDIR)/wine.man.in >$@ || $(RM) $@
+	sed -e 's,@bindir\@,$(bindir),g' -e 's,@dlldir\@,$(dlldir),g' -e 's,@PACKAGE_STRING\@,@PACKAGE_STRING@,g' $(SRCDIR)/wine.man.in >$@ || ($(RM) $@ && false)
 
 # Rules for distribution tarballs of formatted docs
 
 dist: wine-doc-ps.tar.gz wine-doc-pdf.tar.gz wine-doc-html.tar.gz wine-doc-txt.tar.gz
 
 wine-doc-ps.tar.gz: $(ALLBOOKS:%=%.ps)
-	tar cf - $(ALLBOOKS:%=%.ps) | gzip -9 > $@ || $(RM) $@
+	tar cf - $(ALLBOOKS:%=%.ps) | gzip -9 > $@ || ($(RM) $@ && false)
 
 wine-doc-pdf.tar.gz: $(ALLBOOKS:%=%.pdf)
-	tar cf - $(ALLBOOKS:%=%.pdf) | gzip -9 > $@ || $(RM) $@
+	tar cf - $(ALLBOOKS:%=%.pdf) | gzip -9 > $@ || ($(RM) $@ && false)
 
 wine-doc-html.tar.gz: $(ALLBOOKS:%=%/index.html)
-	tar cf - $(ALLBOOKS:%=%/*.html) | gzip -9 > $@ || $(RM) $@
+	tar cf - $(ALLBOOKS:%=%/*.html) | gzip -9 > $@ || ($(RM) $@ && false)
 
 wine-doc-txt.tar.gz: $(ALLBOOKS:%=%/index.html)
 	for i in $(ALLBOOKS:%=%/*.html); do w3m -dump $$i > `dirname $$i`/`basename $$i .html`.txt || exit 1; done
-	tar cf - $(ALLBOOKS:%=%/*.txt) | gzip -9 > $@ || $(RM) $@
+	tar cf - $(ALLBOOKS:%=%/*.txt) | gzip -9 > $@ || ($(RM) $@ && false)
 
 install:: $(MAN_TARGETS)
 	$(MKINSTALLDIRS) $(mandir)/man$(prog_manext) $(mandir)/man$(conf_manext) $(mandir)/man$(api_manext)