build: work around docbook2x-man inability to specify output file

Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/Makefile.rules.in b/Makefile.rules.in
index 7ee9a078867e296581fc7078fcc68dddb0e48492..242cf4c4ec572f6a1b3413fd7666b23cd7c65fa2 100644 (file)
--- a/Makefile.rules.in
+++ b/Makefile.rules.in
@@ -30,7 +30,7 @@ configure:            configure.ac
 
 %.8:                   %.xml   $(makedeps)
                        @echo -e "  MAN\t\t$@"
-                       docbook2x-man $<
+                       (cd $(SUBDIR); docbook2x-man ../$<)
 
 %.pdf:                 %.xml   $(makedeps)
                        @echo -e "  PDF\t\t$@"