btrfs-progs: docs: Don't erase XMLTO_EXTRA contents, fix docbook5 build

XMLTO_EXTRA is defined above, and then appended to if `asciidoctor` is
used to generate the manual pages.  The second definition was clearing
the value of this variable, which caused builds with asciidoctor to
fail with:

```
    [XMLTO]  btrfs-ioctl.3
xmlto: /usr/src/packages/user/btrfs-progs/src/btrfs-progs-v5.4/Documentation/btrfs-ioctl.xml does not validate (status 3)
xmlto: Fix document syntax or use --skip-validation option
validity error : no DTD found!
Document /usr/src/packages/user/btrfs-progs/src/btrfs-progs-v5.4/Documentation/btrfs-ioctl.xml does not validate
make[1]: *** [Makefile:114: btrfs-ioctl.3] Error 13
```

Fixes: 669f56177 ("btrfs-progs: docs: use docbook5 backend for asciidoctor")
Signed-off-by: A. Wilcox <AWilcox@Wilcox-Tech.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
A. Wilcox 2020-01-08 15:19:02 -06:00 committed by David Sterba
parent d3f7315b3c
commit 2a064d77a7

View File

@ -66,7 +66,6 @@ ASCIIDOC_DEPS =
endif
MANPAGE_XSL = manpage-normal.xsl
XMLTO_EXTRA =
INSTALL = @INSTALL@
RM = @RM@
RMDIR = @RMDIR@