DocBook: use DOCBOOKS="" to ignore DocBooks instead of IGNORE_DOCBOOKS=1

[cascardo/linux.git] / Documentation / DocBook / Makefile

diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile
index 01bab50..fb32ab8 100644 (file)
--- a/Documentation/DocBook/Makefile
+++ b/Documentation/DocBook/Makefile
@@ -6,8 +6,6 @@
 # To add a new book the only step required is to add the book to the
 # list of DOCBOOKS.
 
-ifeq ($(IGNORE_DOCBOOKS),)
-
 DOCBOOKS := z8530book.xml device-drivers.xml \
            kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
            writing_usb_driver.xml networking.xml \
@@ -19,6 +17,14 @@ DOCBOOKS := z8530book.xml device-drivers.xml \
            tracepoint.xml gpu.xml media_api.xml w1.xml \
            writing_musb_glue_layer.xml crypto-API.xml iio.xml
 
+ifeq ($(DOCBOOKS),)
+
+# Skip DocBook build if the user explicitly requested no DOCBOOKS.
+.DEFAULT:
+       @echo "  SKIP    DocBook $@ target (DOCBOOKS=\"\" specified)."
+
+else
+
 include Documentation/DocBook/media/Makefile
 
 ###
@@ -217,19 +223,7 @@ silent_gen_xml = :
               -e "s/>/\\>/g";     \
           echo "</programlisting>")  > $@
 
-else
-
-# Needed, due to cleanmediadocs
-include Documentation/DocBook/media/Makefile
-
-htmldocs:
-pdfdocs:
-psdocs:
-xmldocs:
-installmandocs:
-
-endif # IGNORE_DOCBOOKS
-
+endif # DOCBOOKS=""
 
 ###
 # Help targets as used by the top-level makefile
@@ -246,7 +240,7 @@ dochelp:
        @echo  '  make DOCBOOKS="s1.xml s2.xml" [target] Generate only docs s1.xml s2.xml'
        @echo  '  valid values for DOCBOOKS are: $(DOCBOOKS)'
        @echo
-       @echo  "  make IGNORE_DOCBOOKS=1 [target] Don't generate docs from Docbook"
+       @echo  "  make DOCBOOKS=\"\" [target] Don't generate docs from Docbook"
        @echo  '     This is useful to generate only the ReST docs (Sphinx)'