#################################################################
# Kernel RPM spec file by Tim Jackson <tim@timj.co.uk>
# includes support for RML's preemptive kernel patch
#
# Based very loosely on the Red Hat kernel spec file;
# considerably less generic (but MUCH simpler)
#
# My understanding of kernel installation is limited; if you spot
# anything blatently broken please let me know.
#
# NOTE: This is slightly naughty in that it builds the kernel in
# /usr/src/linux-x.y.z-rel NOT /usr/src/redhat/BUILD although it
# moves it back to /usr/src/redhat/BUILD afterwards. This isn't
# entirely proper but makes things much simpler and works.

# Include kernel preemptive patch?
%define preemptivepatch 0

# Versions of various parts
%define release 1
%define sublevel 18
%define kversion 2.4.%{sublevel}

# first XFree86 ver that requires the drm in this kernel
%define drmver 4.1.0

# disable build root strip policy
# tim: WTF?
%define __spec_install_post /usr/lib/rpm/brp-compress || :

%define KVERREL %{PACKAGE_VERSION}-%{PACKAGE_RELEASE}

Name: kernel
Summary: The Linux kernel (the core of the Linux operating system)
Version: %{kversion}
Release: %{release}
License: GPL
Group: System Environment/Kernel
ExclusiveOS: Linux
Obsoletes: kernel-modules
Provides: kernel = %{version}, kernel-drm = %{drmver}
Autoreqprov: no
Prereq: fileutils, initscripts >= 5.83, mkinitrd >= 3.2.2
Conflicts: ppp <= 2.3.15, e2fsprogs <= 1.18, pcmcia-cs <= 3.1.20, isdn4k-utils <= 3.0, mount < 2.10r-5, nfs-utils < 0.3.1, cipe < 1.4.5, kudzu <= 0.92, e2fsprogs < 1.22

BuildPreReq: modutils >= 2.4.2, bash >= 2.03, sh-utils
Source0: ftp://ftp.kernel.org/pub/linux/kernel/v2.4/linux-%{kversion}.tar.gz
Source1: kernel-%{kversion}.config
%if %{preemptivepatch}
Patch0: http://www.kernel.org/pub/linux/kernel/people/rml/preempt-kernel/v2.4/preempt-kernel-rml-2.4.18-2.patch
%endif

BuildRoot: %{_tmppath}/kernel-%{KVERREL}-root

######################################################################
# package information

%package source
Summary: The source code for the Linux kernel.
Group: Development/System
Prereq: fileutils
Requires: gawk
Requires: gcc

%package headers
Summary: Header files for the Linux kernel.
Group: Development/System
Prereq: fileutils initscripts >= 5.83
Requires: gawk

%description
The kernel package contains the Linux kernel (vmlinuz), the core of your
Red Hat Linux operating system.  The kernel handles the basic functions
of the operating system:  memory allocation, process allocation, device
input and output, etc.

%description source
The kernel-source package contains the source code files for the Linux
kernel. These source files are needed to build most C programs, since
they depend on the constants defined in the source code. The source
files can also be used to build a custom kernel that is better tuned
to your particular hardware, if you are so inclined (and you know what
you're doing).

%description headers
Kernel-headers includes the C header files for the Linux kernel.  The
header files define structures and constants that are needed for
building most standard programs and are also needed for rebuilding the
kernel.

#####################################################################
# prep

%prep

%setup -q -n %{name}-%{version} -c
mv linux linux-%{kversion}

%if %{preemptivepatch}
%patch0 -p0
%endif

# Minor hack: move the source into /usr/src ready for building
rm -rf /usr/src/linux-%{KVERREL}
mv linux-%{kversion} /usr/src/linux-%{KVERREL}


#####################################################################
# build

%build

cd /usr/src/linux-%{KVERREL}

make mrproper

cp -fv $RPM_SOURCE_DIR/kernel-%{kversion}.config .config

# Add the RPM release number to EXTRAVERSION in Makefile
perl -p -i -e "s/^EXTRAVERSION.*/EXTRAVERSION = -%{release}/" Makefile

#echo CONFIGURING KERNEL FOR BUILD...
make -s oldconfig
	
#echo MAKING DEPENDENCIES...
make -s dep

#echo BUILDING THE KERNEL IMAGE...
make bzImage 

#echo BUILDING THE KERNEL MODULES...
make modules


##################################################################
# install

%install

cd /usr/src/linux-%{KVERREL}

rm -rf $RPM_BUILD_ROOT


### install the stuff in /boot
mkdir -p $RPM_BUILD_ROOT/boot
install -m 644 System.map $RPM_BUILD_ROOT/boot/System.map-%{KVERREL}
cp arch/i386/boot/bzImage $RPM_BUILD_ROOT/boot/vmlinuz-%{KVERREL}

# create /boot/kernel.h-x.y.z (filled at boot time)
touch $RPM_BUILD_ROOT/boot/kernel.h-%{kversion}

### install modules stuff
mkdir -p $RPM_BUILD_ROOT/lib/modules/%{KVERREL}
make INSTALL_MOD_PATH=$RPM_BUILD_ROOT modules_install KERNELRELEASE=%{KVERREL}

# these files seem to be regenerated on bootup
rm -f $RPM_BUILD_ROOT/lib/modules/%{KVERREL}/modules.*

# don't know why we have to mess around with */build but presumably we need to
# (it was in the original Red Hat spec)
for i in $RPM_BUILD_ROOT/lib/modules/*; do
  rm -f $i/build 
  ln -sf ../../../usr/src/linux-%{KVERREL} $i/build
done


### install the source
# put the current source we've been working on into /usr/src/linux-x.y.z
mkdir -p $RPM_BUILD_ROOT/usr/src
cp -pr /usr/src/linux-%{KVERREL} $RPM_BUILD_ROOT/usr/src/


### install include files
mkdir -p $RPM_BUILD_ROOT/usr/include/linux
cp -a $RPM_BUILD_ROOT/usr/src/linux-%{KVERREL}/include/linux/* $RPM_BUILD_ROOT/usr/include/linux/

# Stop people using headers from /usr/include/linux/modules* (when compiling modules only??)
rm -rf $RPM_BUILD_ROOT/usr/include/linux/modules
echo "#error Modules should never use kernel-headers system headers," > $RPM_BUILD_ROOT/usr/include/linux/modversions.h
echo "#error but rather headers from an appropriate kernel-source package." >> $RPM_BUILD_ROOT/usr/include/linux/modversions.h
echo "#error Change -I/usr/src/linux/include (or similar) to" >> $RPM_BUILD_ROOT/usr/include/linux/modversions.h
echo "#error -I/lib/modules/\$(uname -r)/build/include" >> $RPM_BUILD_ROOT/usr/include/linux/modversions.h
echo "#error to build against the currently-running kernel." >> $RPM_BUILD_ROOT/usr/include/linux/modversions.h

mkdir -p $RPM_BUILD_ROOT/usr/include/asm
cp -a $RPM_BUILD_ROOT/usr/src/linux-%{KVERREL}/include/asm/* $RPM_BUILD_ROOT/usr/include/asm/

# remove /lib/modules/*/modules.* from BuildRoot (not entirely sure why)
for i in $RPM_BUILD_ROOT/lib/modules/*; do
  rm -f $i/modules.*
done

# move the kernel sources we've been using back out of the way
cd /usr/src
mv linux-%{KVERREL} /usr/src/redhat/BUILD/kernel-%{kversion}/linux

#############################################################################
# clean

%clean

rm -rf $RPM_BUILD_ROOT

#############################################################################
# scripts

# do this for upgrades...in case the old modules get removed we have
# loopback in the kernel so that mkinitrd will work.
%pre 
/sbin/modprobe loop 2> /dev/null > /dev/null  || :
exit 0

%post 
cd /boot
ln -sf vmlinuz-%{KVERREL} vmlinuz
ln -sf System.map-%{KVERREL} System.map
[ -x /usr/sbin/module_upgrade ] && /usr/sbin/module_upgrade
depmod -ae -F /boot/System.map-%{KVERREL} %{KVERREL}
[ -x /sbin/mkkerneldoth ] && /sbin/mkkerneldoth
if [ -x /sbin/new-kernel-pkg ] ; then
        /sbin/new-kernel-pkg --mkinitrd --depmod --install %{KVERREL}
fi

# Allow clean removal of modules directory
%preun 
/sbin/modprobe loop 2> /dev/null > /dev/null  || :
#rm -f /lib/modules/%{KVERREL}/modules.*
if [ -x /sbin/new-kernel-pkg ] ; then
 /sbin/new-kernel-pkg --rminitrd --rmmoddep --remove %{KVERREL}
fi

%pre headers
[ -L /usr/include/linux ] && rm -f /usr/include/linux || :
[ -L /usr/include/asm ] && rm -f /usr/include/asm || :
exit 0

%post headers
cd /boot
rm -f kernel.h
ln -snf kernel.h-%{kversion} kernel.h
[ -x /sbin/mkkerneldoth ] && /sbin/mkkerneldoth
exit 0


# We need this here because we don't prereq kudzu; it could be
# installed after the kernel
%triggerin -- kudzu
[ -x /usr/sbin/module_upgrade ] && /usr/sbin/module_upgrade || :

# Old kernel-headers packages owned include symlinks; new
# ones just make them so that we can have multiple kernel-headers
# packages installed.
%triggerpostun headers -- kernel-headers < 2.2.16
cd /boot
rm -f kernel.h
ln -snf kernel.h-%{kversion} kernel.h
exit 0

%postun headers
if [ $1 = 0 ]; then
    if [ -L /boot/kernel.h -a `ls -l /boot/kernel.h 2>/dev/null| awk '{ print $11 }'` = "kernel.h-%{kversion}" ]; then
	rm -f /boot/kernel.h
    fi
fi
exit 0

%postun source
if [ -L /usr/src/%{kslnk} ]; then 
    if [ -L /usr/src/%{kslnk} -a `ls -l /usr/src/%{kslnk} 2>/dev/null| awk '{ print $11 }'` = "linux-%{KVERREL}" ]; then
	[ $1 = 0 ] && rm -f /usr/src/%{kslnk}
    fi
fi
exit 0

#########################################################################
### file lists
###

%files 
%defattr(-,root,root)
/boot/vmlinuz-%{KVERREL}
/boot/System.map-%{KVERREL}
/lib/modules/%{KVERREL}

%files source
%defattr(-,root,root)
/usr/src/linux-%{KVERREL}

%files headers
%defattr(-,root,root)
/usr/include/linux
/usr/include/asm
/boot/kernel.h-%{kversion}

%changelog
* Tue Feb 19 2002 Tim Jackson <tim@timj.co.uk>
- Added option to include RML's kernel preemptive patch

* Sun Feb 10 2002 Tim Jackson <tim@timj.co.uk>
- First version of TJ's new, simplified spec file