[Buildroot] docs/buildroot.html - package make file makecommand overrides configure script CC setting

John Schimandle john_schimandle at hotmail.com
Wed Oct 22 15:14:23 UTC 2008

Sounds good. I'll submit some changes to the doc.

Might as well update the documentation the best I can since I'm going
through this learning curve on buildroot. That way other newbies can get a
faster start. 

-----Original Message-----
From: Bernhard Reutner-Fischer [mailto:rep.dot.nop at gmail.com] 
Sent: Wednesday, October 22, 2008 5:38 AM
To: John Schimandle
Cc: buildroot at uclibc.org
Subject: Re: [Buildroot] docs/buildroot.html - package make file makecommand
overrides configure script CC setting

On Wed, Oct 22, 2008 at 04:36:53AM -0700, John Schimandle wrote:
>I've been stumbling through adding a package to buildroot. Although I 
>did make a successful package I did find a potential problem with the 
>documenation, buildroot usage and documentation document at 
>docs/buildroot.html specifically the section entitled "Extending 
>Buildroot with more software". This section describes the package make 
>file in package/name/name.mk. It shows an example of the file which I 
>think is incorrect. Lines 33 and 34 specify a make statement that 
>overrides the variable settings of CC that are set in configure. The 
>overriding action causes all makes within the package to have the CC 
>variable set to TARGET_CC and not the CC variable defined in the 
>configure script. The CC variable in the configure script is set by 
>contains architecture specific information for the compiler which is
important for some packages.
>Original statement in example
>33  $(FOO_DIR)/$(FOO_BINARY): $(FOO_DIR)/.configured
>34          $(MAKE) CC=$(TARGET_CC) -C $(FOO_DIR)
>I think the example should have the following statements (line 33 is
>33  $(FOO_DIR)/$(FOO_BINARY): $(FOO_DIR)/.configured
>34          $(MAKE) -C $(FOO_DIR)

yes. I suggest you look at how often these documentation receives updates,
compared to the "code" itself..
>Now the targets see the full CC arguments that were passed to the 
>configure script and were written into each Makefile in the package.
>I don't know if this would be valid for all packages but it seems to me 

This example should only be used for packages which do not use autotools
(autoconf / automake etc). These packages should use
package/Makefile.autotools.in and _not_ this oldish example code.

>you would want to preserve the CC variable setting that was done with 
>the configure script.
>Again, I'm not sure how to submit this change to the buildroot tree.

Changes can be submitted for inclusion by posting them to the buildroot
mailing list or to the Bug and Patch Tracking System.
(from the webpage)

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