txt/Makefile: order-only prerequisite

No need to rebuild when the directory's timestamp is updated.

Signed-off-by: Gene Cumm <gene.cumm@gmail.com>

diff --git a/txt/Makefile b/txt/Makefile
index 0365577..c325c38 100644 (file)
--- a/txt/Makefile
+++ b/txt/Makefile
@@ -72,7 +72,7 @@ syslinux.cfg.txt:     com-bug.txt com-rpt.txt
 html/ man/ text/ xhtml/:
        mkdir $@
 
-html/%.html:   %.txt html/
+html/%.html:   %.txt   | html/
        asciidoc -o $@ $<
 
 # As of AsciiDoc-8.5.2, altering the output filename for a2x does not appear possible
@@ -88,10 +88,10 @@ html/%.html:        %.txt html/
 %.html:        %.xml %.txt
        a2x $(A2X_OPTS) -f xhtml $<
 
-man/%.1:       %.txt man/
+man/%.1:       %.txt   | man/
        a2x $(A2X_MAN_OPTS) $<
 
-man/%.5:       %.txt man/
+man/%.5:       %.txt   | man/
        a2x $(A2X_MAN_OPTS) $<
 
 %.text:        %.xml %.txt