linux-kernel - Re: kbuild docs regression

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Message-ID: <20090618094604.GC6133@cr0.nay.redhat.com>
Date:	Thu, 18 Jun 2009 17:46:04 +0800
From:	Amerigo Wang <xiyou.wangcong@...il.com>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	samr <sam@...nborg.org>
Subject: Re: kbuild docs regression

On Tue, Jun 16, 2009 at 03:14:14PM +0200, Jiri Slaby wrote:
>On 06/15/2009 06:31 PM, Randy Dunlap wrote:
>> make htmldocs
>> without using "O=dir" now (as of 2.6.30-git8) fails with
>> 
>>   DOCPROC Documentation/DocBook/deviceiobook.xml
>>   DOCPROC Documentation/DocBook/device-drivers.xml
>> exec /scripts/kernel-doc: No such file or directory
>> exec /scripts/kernel-doc: No such file or directory
>> make[1]: *** [Documentation/DocBook/deviceiobook.xml] Error 1
>> 
>> (+ more)
>> 
>> Using V=1 shows that SRCTREE is set but KBUILD_SRC is not set:
>
>Hmm, thanks, actually it's set, but it's empty :(. Is it expected, or is
>it a build-sys bug?

No, it is a bug of docproc. Patch below fixes it.

Signed-off-by: WANG Cong <xiyou.wangcong@...il.com>

---
diff --git a/scripts/basic/docproc.c b/scripts/basic/docproc.c
index 4c9523e..99ca7a6 100644
--- a/scripts/basic/docproc.c
+++ b/scripts/basic/docproc.c
@@ -385,7 +385,7 @@ int main(int argc, char *argv[])
 	if (!srctree)
 		srctree = getcwd(NULL, 0);
 	kernsrctree = getenv("KBUILD_SRC");
-	if (!kernsrctree)
+	if (!kernsrctree || !*kernsrctree)
 		kernsrctree = srctree;
 	if (argc != 3) {
 		usage();
--
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