ExclusiveArch: aarch64 armv7hl

%undefine _debugsource_packages

%define with_cross    %{?_with_cross:         1} %{?!_with_cross:        0}

# 忘记从哪里抄来的了
%define patchlevel 31

%define Arch arm64
%define kversion 5.10.160
%define krelease 6%{?dist}
%define KernelVer %{kversion}-%{krelease}.%{_target_cpu}

Name:           orangepi-3b
Version:        %{kversion}
Release:        %{krelease}
Summary:        Kernel for Orange Pi 3B

License:        GPLv2
URL:            https://github.com/orangepi-xunlong/linux-orangepi/tree/orange-pi-5.10-rk35xx
Source0:        linux-orangepi.tar.gz
Source1:        orangepi-3b.config

# https://lore.kernel.org/lkml/CAMj1kXE+LBOBavOre1O8LTGPCmB8m58fbfo92Sx4WukyNAur-A@mail.gmail.com/
Patch0:         fix-missing-build-id.patch 

BuildRequires: kmod, patch, bash, coreutils, tar
BuildRequires: bzip2, xz, findutils, gzip, m4, perl, perl-Carp, make, diffutils, gawk
BuildRequires: gcc, binutils, redhat-rpm-config, hmaccalc, git
BuildRequires: net-tools, hostname, bc
BuildRequires: elfutils-devel zlib-devel binutils-devel newt-devel python3-devel perl(ExtUtils::Embed) bison flex xz-devel
BuildRequires: audit-libs-devel
BuildRequires: pciutils-devel gettext ncurses-devel
BuildRequires: openssl-devel

# dtbs中需要编译两个uboot 的scr，将来可能会顺便编译boot.scr
# 需要在copr中额外引入第三方仓库
BuildRequires: uboot-tools

%if %{with_cross}
BuildRequires: binutils-%{_build_arch}-linux-gnu, gcc-%{_build_arch}-linux-gnu
%define cross_opts CROSS_COMPILE=%{_build_arch}-linux-gnu-
%define __strip %{_build_arch}-linux-gnu-strip
%endif

# Compile with SELinux but disable per default
#Patch100:       bcm2709_selinux_config.patch
#Patch101:       bcm2711_selinux_config.patch

%description
Kernel for Orange Pi 3B

%package kernel
Group:          System Environment/Kernel
Summary:        The Linux kernel
Provides:       kernel = %{version}-%{release}
Provides:       installonlypkg(kernel)
Requires:	coreutils
Requires:	dracut
Requires:	uboot-tools

%description kernel
Linux operating system.  The kernel handles the basic functions
of the operating system: memory allocation, process allocation, device
input and output, etc.


%package kernel-devel
Group:          System Environment/Kernel
Summary:        Development package for building kernel modules to match the kernel
Provides:       kernel-devel = %{version}-%{release}
Provides:       kernel-devel-uname-r = %{version}-%{release}
Provides:       installonlypkg(kernel)
Autoreq:        no
Requires(pre):  findutils
Requires:       findutils
Requires:       perl-interpreter

%description kernel-devel
This package provides kernel headers and makefiles sufficient to build modules
against the kernel package.


%package dtb
Summary:        DTB for Orange Pi 3B
Obsoletes:      grub, grubby, efibootmgr
Provides:       grubby=8.40-10
Provides:       installonlypkg(kernel-module)
%description dtb
/boot/内的dtb已经包含在kernel内了，这个包只是占位符，避免系统安装grub、grubby、efibootmgr包。

%prep
%setup -q -n linux-orangepi
cp %{SOURCE1} .

%patch0 -p0

# 内核源代码中有一些脚本，它们的shebang只写了python，没有指明python2还是python3
# 这既会在编译时带来问题，需要手动把python指向python3，修完之后的%check阶段又通不过rpmbuild的检查
# 所以需要手动修复源代码，把它们都指向python3
# This fixes errors such as
# *** ERROR: ambiguous python shebang in /usr/bin/kvm_stat: #!/usr/bin/python. Change it to python3 (or python2) explicitly.
# We patch all sources below for which we got a report/error.
echo "Fixing Python shebangs..."
%py3_shebang_fix \
        tools/kvm/kvm_stat/kvm_stat \
        scripts/show_delta \
        scripts/diffconfig \
        scripts/bloat-o-meter \
        scripts/jobserver-exec \
        scripts/tracing \
        scripts/bmpconvert \
        scripts/clang-wrapper.py \
        scripts/gcc-wrapper.py \
        scripts/mkmultidtb.py \
        scripts/spdxcheck.py \
        tools \
        Documentation \
        scripts/clang-tools 2> /dev/null

%build
# 交叉编译
## 根据fedora官方spec中的注释，交叉编译时不能启用%{?build_cflags} %{?build_ldflags}，因为这些来自 redhat-rpm-config 里的宏
# 假设 host == target

%if !%{with_cross}
%define build_hostcflags  %{?build_cflags}
%define build_hostldflags %{?build_ldflags}
%endif

# 修改内核版本代码
# make sure EXTRAVERSION says what we want it to say
# Trim the release if this is a CI build, since KERNELVERSION is limited to 64 characters

ShortRel=$(perl -e "print \"%{release}\" =~ s/\.pr\.[0-9A-Fa-f]{32}//r")
perl -p -i -e "s/^EXTRAVERSION.*/EXTRAVERSION = -${ShortRel}.%{_target_cpu}${Variant:++${Variant}}/" Makefile
 
# if pre-rc1 devel kernel, must fix up PATCHLEVEL for our versioning scheme
# if we are post rc1 this should match anyway so this won't matter
#perl -p -i -e 's/^PATCHLEVEL.*/PATCHLEVEL = %{patchlevel}/' Makefile

# make -j8 CROSS_COMPILE=aarch64-linux-gnu- ARCH=arm64 help
# 可以得到平台相关的target的解释

#make %{?cross_opts} ARCH=%{Arch} bcm%{bcmmodel}_defconfig
cp orangepi-3b.config .config
make %{?_smp_mflags} %{?cross_opts} ARCH=%{Arch} HOSTCFLAGS="%{?build_hostcflags}" HOSTLDFLAGS="%{?build_hostldflags}" V=1 Image
make %{?_smp_mflags} %{?cross_opts} ARCH=%{Arch} HOSTCFLAGS="%{?build_hostcflags}" HOSTLDFLAGS="%{?build_hostldflags}" V=1 modules
make %{?_smp_mflags} %{?cross_opts} ARCH=%{Arch} HOSTCFLAGS="%{?build_hostcflags}" HOSTLDFLAGS="%{?build_hostldflags}" V=1 dtbs

%install

# 创建目录
mkdir -p $RPM_BUILD_ROOT
## 内核镜像
mkdir -p $RPM_BUILD_ROOT/boot

## 内核模块
mkdir -p $RPM_BUILD_ROOT/lib/modules/%{KernelVer}
mkdir -p $RPM_BUILD_ROOT/usr/include/

# 开始安装

## 内核
install -m 644 .config $RPM_BUILD_ROOT/boot/config-%{KernelVer}
install -m 644 .config $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/config
install -m 644 System.map $RPM_BUILD_ROOT/boot/System.map-%{KernelVer}
install -m 644 System.map $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/System.map

cp arch/arm64/boot/Image $RPM_BUILD_ROOT/boot/vmlinuz-%{KernelVer}
chmod 755 $RPM_BUILD_ROOT/boot/vmlinuz-%{KernelVer}
cp $RPM_BUILD_ROOT/boot/vmlinuz-%{KernelVer} $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/vmlinuz

## 设备树
make %{?_smp_mflags} ARCH=%{Arch} INSTALL_DTBS_PATH=$RPM_BUILD_ROOT/boot/dtb-%{KernelVer} V=1 dtbs_install
cp -r $RPM_BUILD_ROOT/boot/dtb-%{KernelVer} $RPM_BUILD_ROOT/lib/modules/%{KernelVer}/dtb
find arch/%{Arch}/boot/dts -name '*.dtb' -type f -delete

## 内核模块
make %{?_smp_mflags} ARCH=%{Arch} INSTALL_MOD_PATH=$RPM_BUILD_ROOT KERNELRELEASE=%{KernelVer} V=1 modules_install

## kernel-devel (来自Almalinux)

DevelDir=/usr/src/kernels/%{KernelVer}
mkdir -p %{buildroot}$DevelDir

# first copy everything
cp -p -v Module.symvers System.map %{buildroot}$DevelDir
cp --parents `find  -type f -name "Makefile*" -o -name "Kconfig*"` %{buildroot}$DevelDir

# then drop all but the needed Makefiles/Kconfig files
rm -rf %{buildroot}$DevelDir/Documentation
rm -rf %{buildroot}$DevelDir/scripts
rm -rf %{buildroot}$DevelDir/include
cp .config %{buildroot}$DevelDir
cp -a scripts %{buildroot}$DevelDir
cp -a include %{buildroot}$DevelDir

if [ -d arch/%{Arch}/scripts ]; then
  cp -a arch/%{Arch}/scripts %{buildroot}$DevelDir/arch/%{Arch} || :
fi
if [ -f arch/%{Arch}/*lds ]; then
  cp -a arch/%{Arch}/*lds %{buildroot}$DevelDir/arch/%{Arch}/ || :
fi
if [ -f arch/%{Arch}/kernel/module.lds ]; then
  cp -a --parents arch/%{Arch}/kernel/module.lds %{buildroot}$DevelDir/
fi
rm -f %{buildroot}$DevelDir/scripts/*.o
rm -f %{buildroot}$DevelDir/scripts/*/*.o
cp -a --parents arch/%{Arch}/include %{buildroot}$DevelDir

cp include/generated/uapi/linux/version.h %{buildroot}$DevelDir/include/linux
touch -r %{buildroot}$DevelDir/Makefile %{buildroot}$DevelDir/include/linux/version.h

rm -f %{buildroot}/lib/modules/%{KernelVer}/build
rm -f %{buildroot}/lib/modules/%{KernelVer}/source
ln -s $DevelDir %{buildroot}/lib/modules/%{KernelVer}/build
ln -s build %{buildroot}/lib/modules/%{KernelVer}/source

%files kernel
%defattr(-,root,root,-)
/boot/config-%{KernelVer}
/boot/System.map-%{KernelVer}
/boot/vmlinuz-%{KernelVer}

/lib/modules/%{KernelVer}
/lib/modules/%{KernelVer}/config
/lib/modules/%{KernelVer}/System.map
/lib/modules/%{KernelVer}/vmlinuz

/boot/dtb-%{KernelVer}

/lib/modules/%{KernelVer}/kernel
/lib/modules/%{KernelVer}/modules.*
/lib/modules/%{KernelVer}/build
/lib/modules/%{KernelVer}/source

%postun kernel
rm -f /boot/uinitramfs-%{KernelVer}.img

%posttrans kernel
# 从uboot那边下手，一切都轻松起来了
dracut -f /boot/initramfs-%{KernelVer}.img %{KernelVer}
mkimage -A arm64 -O linux -T ramdisk -C gzip -a 0 -e 00 -n Linux -d /boot/initramfs-%{KernelVer}.img /boot/uinitramfs-%{KernelVer}.img
rm -f /boot/initramfs-%{KernelVer}.img

%files kernel-devel
%defattr(-,root,root)
/usr/src/kernels/%{KernelVer}

%files dtb
%defattr(-,root,root,-)
/lib/modules/%{KernelVer}/dtb

%changelog