Kernel module standards

[Ignacio Vazquez-Abrams]

I was asked by Warren to post the standards that I use for building
kernel modules, so here they are.

> %{!?kernelroot: %define kernelroot "" }

When building a kernel for multiple archs it's handy to have the
kernel/kernel-devel package for the archs all installed at the same
time. While UP/SMP/hugemem/Xen kernels can be installed on the same
root, two UP kernels for different archs cannot. The way I get around
this is to install the kernel in /$arch, then pass '--define
"kernelroot /$arch"' to rpmbuild. In this way I can build the module for
all archs in one go instead of having to deal with switching kernels in
and out, *PLUS* it still builds properly if someone just does 'rpmbuild
-bb kernel-module-foo.spec' provided they have the kernel-devel package
for the kernel they're running.

> %{!?kernelversion: %define kernelversion %(uname -r) }

Like above, except this is used for selecting between parallel-installed
kernel versions.

> %package %{kernelversion}

Yes, it's ugly, but it does allow multiple copies of a module to be
installed, one per kernel version.

> Provides:       %{name} = %{version}

I'm sure this will come in handy one day...

The attached script is how I invoke rpmbuild to build it on FC3/i386.
It's easy enough to modify it for other archs/distros, I just haven't
needed to as of yet.

-- 
Ignacio Vazquez-Abrams <ivazquez at ivazquez.net>
http://fedora.ivazquez.net/

gpg --keyserver hkp://subkeys.pgp.net --recv-key 38028b72
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%{!?kernelroot: %define kernelroot "" }
%{!?kernelversion: %define kernelversion %(uname -r) }
Name:           kernel-module-qla4xxx
Version:        5.00.02
Release:        0.iva.1
Summary:        Driver for QLogic QLA4xxx iSCSI cards

Group:          System Environment/Base
License:        GPL
URL:            http://www.qlogic.com/
Source0:        http://download.qlogic.com/drivers/27588/qla4xxx-5.00.02.tar.gz
Patch:          qla4xxx-5.00.02-inline.patch
Patch1:         qla4xxx-5.00.02-build.patch
BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
ExclusiveArch:  i586 i686 x86_64

%description
This package contains the driver for QLogic's QLA4xxx series of iSCSI cards.

%package %{kernelversion}
Summary:        Driver for QLogic QLA4xxx iSCSI cards
Group:          System Environment/Base
Provides:       %{name} = %{version}

%description %{kernelversion}
This package contains the driver for QLogic's QLA4xxx series of iSCSI cards for
kernel %{kernelversion} for the %{_target_cpu} architecture.

%prep
%setup -q -n 5.00.02
chmod u+x extras
%patch -p1 -b .inline
%patch1 -p1 -b .build

%build
K_LIBS=%{kernelroot}/lib/modules/%{kernelversion} extras/build.sh

%install
rm -rf $RPM_BUILD_ROOT
mkdir -p $RPM_BUILD_ROOT/lib/modules/%{kernelversion}/kernel/drivers/scsi/qla4xxx
install -m 0644 qla4xxx.ko $RPM_BUILD_ROOT/lib/modules/%{kernelversion}/kernel/drivers/scsi/qla4xxx

%clean
rm -rf $RPM_BUILD_ROOT

%post %{kernelversion}
depmod -ae

%postun %{kernelversion}
if [ $1 -eq 0 ]; then
    depmod -aq
fi

%files %{kernelversion}
%defattr(-,root,root,-)
%doc ../release.txt revision.notes
/lib/modules/%{kernelversion}/kernel/drivers/scsi/qla4xxx/qla4xxx.ko

%changelog
* Wed May 25 2005 Ignacio Vazquez-Abrams <ivazquez at ivazquez.net> 5.00.02-0.iva.1
- Initial RPM release
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