Re: Buildroot problem

[James Olin Oden <joden lee k12 nc us>]

On Thu, 5 Aug 2004, Agarwal Deepesh-A19519 wrote:

> RPM Version = 4.2
> 
> Problem in changing the BUILD ROOT
> ----------------------------------
> 
> I followed the steps mentioned in http://www.rpm.org/max-rpm/ch-rpm-anywhere.html
> for changing the buildroot, because I need to build it in my clearcase VOB and
> NOT in /usr/src/redhat/BUILD.
> 
> My .spec file looks like
> -----------------------------------------------------------------
> BuildRoot: /vobs/nightingale/server/product/code/process/ml_temp
>
Ha, another user of clearcase (-: 
> %prep
> RPM_BUILD_DIR=/vobs/nightingale/server/product/code/process/ml_temp
> RPM_SOURCE_DIR=/usr/src/redhat/SOURCES
> rm -rf $RPM_BUILD_DIR/ML
> tar zxvf $RPM_SOURCE_DIR/ML.tgz
> 
> %build
> make
> 
> %install
> make ROOT="$RPM_BUILD_ROOT" install
> -----------------------------------------------------------------------
> 
> Despite this the build happens in the default dir (/usr/src/redhat/BUILD)
> and fails :(
>
Its evil but there are two terms your getting mixed up that kill me when 
I am trying to explain package building to newbies at work.  There is the
build root and there is the build dir.  The build dir (a.k.a. 
/usr/src/redhat/BUILD) is where tarballs are unarchived, patches 
applied and software compile/built (thus it is the build dir).  The 
build root is where you install the software you just built.  Typically 
its a good idea to change this from the default, /, so that you don't 
munge your system, and so it is possible for non-root user to build 
packages.

Now the build root is controled by the BuildRoot: directive in the 
preamble, but the build dir is controlled by by the macro %_builddir
which is set to "%_topdir/BUILD".  So to change your build dir 
and other things like where spec files go you will typically add
the following to ~/.rpmmacros:

	%_topdir	/path/to/where/you/want/to/build/things

Or if you want to make a global change you might put this in the
/etc/rpm/macros, but that typically is not desired.

Cheers...james