#!/bin/bash
#
# This script is the first stage in bootstrapping a Fedora build to a
# new platform or architecture.  Running with no arguments builds a
# cross-development environment, then cross-builds a minimal rootfs.
# Once you have this minimal rootfs booted, run stage2 in that rootfs
# to build the rest of the bootstrap packages.
#
# This script assumes that all the needed SRPMs are available in
# $SRPMDIR (below) and that there is exactly one rev of each package's
# SRPM.  The resulting rootfs will be build in $ROOTFS (below).
#
# Note that SRPMDIR_LOCAL is for local SRPMs that override the
# official ones, for example, board-specific kernel RPMs.
#
# You may pass a single module name on the command line to rebuild
# just that one module.  Module names match the big case statement
# below.
#
# For reference, when a package is built multiple times...
#
# foo-host is the "runs on host" part of a standard cross-compiler
# foo-target is the target libraries etc
# target-foo is a cross-built target-native
#
# Note that the "dev" step requires sudo, as it installs special files
# in $ROOTFS/dev/
#
# ------------------------------------------------------------

TOP=$PWD
MYDIR=${0%/*}
STAGE2=$MYDIR/stage2

SRPMDIR=$TOP/SRPMs
SRPMDIR_LOCAL=$TOP/SRPMlocal
J=-j12

BUILDDIR=$TOP/builds
PREFIX=$TOP/install
KCONFIGDIR=$TOP/rpmbuild/SOURCES
KCONFIG=config-armv7l-omap
KARCH=arm

# The cross-compiler target
TARGET=armv7hl-redhat-linux-gnueabi
# the RPMBUILD target for prepping sources
RPMTARGET=armv7l-redhat-linux-gnu

# this is where the new rootfs will be built
ROOTFS=$TOP/rootfs

if [ -f $MYDIR/local.conf ]
then
    . $MYDIR/local.conf
fi

# ------------------------------------------------------------
# Sanity checks

error()
{
    echo Error: "$@" 1>&2
    ERROR=1
}

if [ ! -d $SRPMDIR/. ]
then
    error SRPMDIR set to $SRPMDIR, but I see no directory there
    echo '$'SRPMDIR usually refers to a symlink to a directory with all the '*'.src.rpm files in it.
    echo SRPMDIR_LOCAL may likewise refer to a directory with local srpm overrides in it
fi

test x"$ERROR" = x"1" && exit 1

unset CC
unset CXX
unset CFLAGS
unset CXXFLAGS
unset AR
unset LD
unset AS

# ------------------------------------------------------------

echo
echo Running: $0 $*
echo Date: `date`
echo Cwd: `pwd`
echo

SRCTOP=$TOP/rpmbuild
SRC=$SRCTOP/BUILD
SPECS=$SRCTOP/SPECS

mkdirp()
{
    test -d $1 || mkdir -p $1
}

mkdirp $SRC
mkdirp $ROOTFS
mkdirp $PREFIX
mkdirp $BUILDDIR
mkdirp $TOP/done

export PATH=$PREFIX/bin:$PATH

mcd()
{
    test -d $1 || mkdir -p $1
    cd $1
}

srpm()
{
    STOP=${2-$TOP}
    SDIR=$SRPMDIR_LOCAL
    SRPM=$(cd $SDIR; \ls -1 $1-*.src.rpm 2>/dev/null | tail -1)
    if [ -f $SDIR/$SRPM ]
    then true; else
	SDIR=$SRPMDIR
	SRPM=$(cd $SDIR; \ls -1 $1-*.src.rpm 2>/dev/null | tail -1)
    fi
    SPEC=${SRPM%-*}
    SPEC=${SPEC%-*}
    if [ -f $STOP/rpmbuild/SPECS/$SPEC.spec ]
    then true; else
	test -f $SDIR/$SRPM || exit 1
	HOME=$STOP rpm -i $SDIR/$SRPM
	cd $STOP/rpmbuild/SPECS
	HOME=$STOP rpmbuild --target=$RPMTARGET --nodeps -bp $SPEC.spec
	cd $TOP
    fi
}
rsrpm()
{
    srpm $1 $ROOTFS/stage2
}

set -e

BUILD=`gcc -v 2>&1 | grep Target: | sed 's/.*: //'`

# These are for cross-tools like gcc, binutils
CONFIGARGS="--prefix=$PREFIX
	    --target=$TARGET
	    --with-cpu=cortex-a8
	    --with-tune=cortex-a8
	    --with-arch=armv7-a
	    --with-float=hard
	    --with-fpu=vfpv3-d16
	    --with-abi=aapcs-linux
	    --enable-languages=c,c++
	    --with-sysroot=$ROOTFS
	    --enable-threads=posix
	    --disable-libssp
"

TCONFIGARGS="--prefix=/usr
	     --build=$BUILD
	     --host=$TARGET
	     --target=$TARGET
	     --enable-werror=no
	     --enable-cxx
	     --with-cpu=cortex-a8
	     --with-tune=cortex-a8
	     --with-arch=armv7-a
	     --with-float=hard
	     --with-fpu=vfpv3-d16
	     --with-abi=aapcs-linux
	     --enable-languages=c,c++
	     --enable-threads=posix
	     --disable-libssp
"


KERNELARGS="ARCH=arm CROSS_COMPILE=${TARGET}-"

# Must use install_root=$ROOTFS on all makes

setup_glibc()
{
    # This path MUST be relative, not absolute
    GLIBCPORTSSRC=../$(cd $SRC; echo glibc-ports*)
    #GLIBCPORTSSRC=ports

    GV=$(cd $SRC; echo glibc-2*)
    GLIBCARGS0="--prefix=/usr
	--with-headers=$ROOTFS/usr/include
	--enable-kernel=2.6.32
	--enable-bind-now
	--build $BUILD
	--host $TARGET
	--disable-profile
	--cache-file=config.cache
	--without-cvs
	--with-elf
	--without-gd"
    GLIBCARGS1="$GLIBCARGS0
	--enable-add-ons=$GLIBCPORTSSRC,nptl
	--disable-sanity-checks
	--with-tls
	--with-__thread
	"
    GLIBCARGS2="$GLIBCARGS0
	--enable-add-ons=$GLIBCPORTSSRC,nptl
	--disable-sanity-checks
	--with-tls
	--with-__thread
	"
}

prefill_glibc_cache()
{
    echo libc_cv_forced_unwind=yes > config.cache
    echo libc_cv_c_cleanup=yes >> config.cache
}

notparallel()
{
    echo .NOTPARALLEL: >> Makefile
}

fix_la()
{
    for la in $ROOTFS/usr/lib/*$1*.la
    do
	if test -f $la
	then
	    rm $la
	fi
    done
}

#--------------------------------------------------

go()
{
    test -f $TOP/done/$1 && return 0
    if "$0" "$@"
    then
	date > $TOP/done/$1
    else
	echo
	echo Module "$@" failed
	return 1
    fi
}

case "$1" in
    "" )
	go kernel-headers
	go binutils
	go gcc-host
	go glibc-headers
	go gcc-libgcc
	go glibc
	go gcc
	go dev

	go kernel
	go x-loader
	go u-boot


	go gmp
	go mpfr
	go mpc
	go ppl
	go cloog
	go libselinux
	go zlib

	go t-binutils
	go t-gcc
	go bash
	go make
	go sed
	go coreutils
	go util-linux
	go tar
	go gzip
	go bzip2
	go diffutils
	go findutils
	go gawk
	go patch
	go unzip
	go which
	go xz
	go grep

	go stage2

	;;

    "clean" )
	set -vx
	mkdir .quickrm.$$
	mv -f $SRCTOP $ROOTFS $PREFIX $BUILDDIR $TOP/done .quickrm.$$
	rm -rf .quickrm.$$ &
	;;

    "sync" )
	echo Copying built rootfs to panda-1...
	rsync -a $ROOTFS/ root@panda-1:/hardfp/
	;;

    "test1" )
	echo test running
	go test
	echo test passed
	;;

    "test" )
	echo Testing
	exit 1
	;;

#--------------------------------------------------
# host cross-tools

    "kernel-headers" )
	srpm kernel
	mcd $BUILDDIR/kernel
	cd $SRC/kernel-*/linux-*
	make $KERNELARGS INSTALL_HDR_PATH=$ROOTFS/usr headers_install
	;;

    "binutils" )
	srpm binutils
	mcd $BUILDDIR/binutils
	$SRC/binutils-*/configure $CONFIGARGS
	notparallel
	make $J
	make $J install
	;;

    "gcc-host" )
	srpm gcc
	mcd $BUILDDIR/gcc
	$SRC/gcc-*/configure $CONFIGARGS --with-headers=$ROOTFS/usr/include
	notparallel
	make $J all-host
	make $J install-host
	;;

    "glibc-headers" )
	set -vx
	srpm glibc
	setup_glibc
	mcd $BUILDDIR/glibc-stage1
	prefill_glibc_cache 
	$SRC/$GV/configure $GLIBCARGS1
	notparallel
	make $J ARCH=arm cross-compiling=yes install-headers install_root=$ROOTFS
	touch $ROOTFS/usr/include/gnu/stubs.h
	touch $ROOTFS/usr/include/bits/stdio_lim.h
	cp $SRC/$GV/nptl/sysdeps/pthread/pthread.h $ROOTFS/usr/include

	( cd $ROOTFS/usr/include/bits
	  sed '/ifndef.*NO_LONG_DOUBLE/,/#endif/d' < mathdef.h > mathdef.h.new
	  mv mathdef.h.new mathdef.h
	)
	

	# We also build just enough files to link libgcc.so.  The fake
	# libc.so will never actually get used.
	mkdirp $ROOTFS/usr/lib
	make $J ARCH=arm cross-compiling=yes csu/subdir_lib
	cp csu/crt*.o $ROOTFS/usr/lib
	$TARGET-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o $ROOTFS/usr/lib/libc.so
	;;

    "gcc-libgcc" )
	srpm gcc
	mcd $BUILDDIR/gcc
	$SRC/gcc-*/configure $CONFIGARGS --with-headers=$ROOTFS/usr/include
	notparallel
	make $J all-target-libgcc
	make $J install-target-libgcc
	;;

    "glibc" )
	srpm glibc
	setup_glibc
	mcd $BUILDDIR/glibc
	prefill_glibc_cache 
	$SRC/$GV/configure $GLIBCARGS2
	notparallel
	make $J ARCH=arm cross-compiling=yes
	make $J ARCH=arm cross-compiling=yes install install_root=$ROOTFS

	( cd $ROOTFS/usr/include/bits
	  sed '/ifndef.*NO_LONG_DOUBLE/,/#endif/d' < mathdef.h > mathdef.h.new
	  mv mathdef.h.new mathdef.h
	)
	;;

    "gcc" )
	srpm gcc
	mcd $BUILDDIR/gcc
	$SRC/gcc-*/configure $CONFIGARGS --with-headers=$ROOTFS/usr/include
	notparallel
	make $J
	make $J install
	mcd $ROOTFS/lib/gcc
	rsync -av $PREFIX/lib/gcc/ $ROOTFS/lib/gcc/
	rsync -av $PREFIX/$TARGET/lib/ $ROOTFS/lib/
	;;

#--------------------------------------------------
# target boot support

    "dev" )
	rsync -av $TOP/dev-template/ $ROOTFS/

	mcd $ROOTFS/tmp
	chmod 1777 .

	mcd $ROOTFS/dev
	sudo mknod null		c   1 3
	sudo mknod zero		c   1 5
	sudo mknod tty		c   5 0
	sudo mknod console	c   5 1
	sudo mknod sda		b   8 0
	sudo mknod sda1		b   8 1
	sudo mknod sda2		b   8 2
	sudo mknod sda3		b   8 3
	sudo mknod sda4		b   8 4
	sudo mknod mmcblk0	b 179 0
	sudo mknod mmcblk0p1	b 179 1
	sudo mknod mmcblk0p2	b 179 2
	sudo mknod mmcblk0p3	b 179 3
	sudo mknod mmcblk0p4	b 179 4
	sudo mknod ttyO0	c 253 0
	sudo mknod ttyO1	c 253 1
	sudo mknod ttyO2	c 253 2
	sudo mknod ttyO3	c 253 3
	;;

    "kernel" )
	srpm kernel
	mcd $BUILDDIR/kernel
	echo copying kernel sources to build area...
	rsync -a --delete $SRC/kernel-*/linux-*/ ./
	cp $KCONFIGDIR/$KCONFIG .config
	make $J ARCH=$KARCH CROSS_COMPILE=${TARGET}- silentoldconfig
	make $J ARCH=$KARCH CROSS_COMPILE=${TARGET}- uImage
	make $J ARCH=$KARCH CROSS_COMPILE=${TARGET}- modules
	make $J ARCH=$KARCH CROSS_COMPILE=${TARGET}- INSTALL_MOD_PATH=$ROOTFS modules_install

	mkdirp $ROOTFS/boot
	mkdirp $ROOTFS/lib/firmware
	cp arch/$KARCH/boot/uImage $ROOTFS/boot
	;;

    "x-loader" )
	if [ ! -f $BUILDDIR/x-loader/README ]
	then
	    cd $BUILDDIR
	    git clone git://gitorious.org/x-loader/x-loader.git
	fi
	cd $BUILDDIR/x-loader
	sed s/-Werror// cpu/omap4/config.mk > cpu/omap4/config.mk.new
	mv cpu/omap4/config.mk.new cpu/omap4/config.mk
	make $J distclean
	make $J CROSS_COMPILE=${TARGET}- omap4430panda_config
	make $J CROSS_COMPILE=${TARGET}-
	mkdirp $ROOTFS/boot
	cp MLO $ROOTFS/boot
	;;

    "u-boot" )
	# git git://git.denx.de/u-boot.git
	if [ ! -f $BUILDDIR/u-boot/README ]
	then
	    cd $BUILDDIR
	    git clone git://git.denx.de/u-boot.git
	fi
	cd $BUILDDIR/u-boot
	make $J distclean
	make $J CROSS_COMPILE=${TARGET}- omap4_panda_config
	make $J CROSS_COMPILE=${TARGET}- u-boot.img
	mkdirp $ROOTFS/boot
	cp u-boot.img $ROOTFS/boot/u-boot.img
	;;

    "djtest" )
	cd $TOP/djtest
	make $J
	make $J install ROOTFS=${ROOTFS}
	;;

#--------------------------------------------------
# target-side libraries

    gmp | mpfr | ppl )
	L=$1
	srpm $L
	mcd $BUILDDIR/t-$L
	$SRC/${L}-*/configure $TCONFIGARGS
	make $J
	make $J install DESTDIR=${ROOTFS}
	fix_la $L
	;;

    mpc )
	L=$1
	srpm libmpc
	mcd $BUILDDIR/t-$L
	$SRC/${L}-*/configure $TCONFIGARGS
	make
	make $J install DESTDIR=${ROOTFS}
	fix_la $L
	;;

    zlib )
	srpm zlib
	mcd $BUILDDIR/t-zlib
	rsync -av $SRC/zlib-*/ ./
	CHOST=${TARGET} \
	    prefix=/usr \
	    ./configure 
	make
	make $J install DESTDIR=${ROOTFS}
	fix_la zlib
	;;

    "cloog" )
	srpm cloog
	mcd $BUILDDIR/t-cloog
	$SRC/cloog-*/configure $TCONFIGARGS --with-ppl
	make $J
	make $J install DESTDIR=${ROOTFS}
	fix_la cloog
	;;

    libselinux )
	srpm libselinux
	mcd $BUILDDIR/t-libselinux
	rsync -av $SRC/libselinux*/ ./
	make $J \
	    CC=${TARGET}-gcc \
	    AS=${TARGET}-as \
	    AR=${TARGET}-ar \
	    STRIP=${TARGET}-strip \
	    RANLIB=${TARGET}-ranlib \
	    CFLAGS="" \
	    all
	make $J \
	    DESTDIR=${ROOTFS} \
	    install
	;;

#--------------------------------------------------
# target-side applications

    "bash" )
	srpm bash
	mcd $BUILDDIR/bash
	cat <<EOF > config.cache
bash_cv_func_ctype_nonascii=yes
bash_cv_opendir_not_robust=no
bash_cv_ulimit_maxfds=yes
bash_cv_func_sigsetjmp=present
bash_cv_printf_a_format=yes
bash_cv_job_control_missing=present
bash_cv_sys_named_pipes=present
bash_cv_unusable_rtsigs=no
EOF
	$SRC/bash-*/configure --prefix=/ --cache-file=config.cache --build=$BUILD --host=$TARGET
	make $J
	make $J install DESTDIR=${ROOTFS}
	(cd $ROOTFS/bin; ln -s bash sh)
	;;

    "t-binutils" )
	srpm binutils
	mcd $BUILDDIR/t-binutils
	$SRC/binutils-*/configure $TCONFIGARGS
	notparallel
	make $J
	make $J install DESTDIR=${ROOTFS}
	;;

    "t-gcc" )
	srpm gcc
	mcd $BUILDDIR/t-gcc
	$SRC/gcc-*/configure $TCONFIGARGS
	notparallel
	make
	make install DESTDIR=${ROOTFS}
	;;

     make | sed | tar | gzip | diffutils | findutils | gawk | which | grep )
	srpm $1
	mcd $BUILDDIR/$1
	$SRC/${1}-*/configure $TCONFIGARGS
	notparallel
	test -d tools/gnulib/lib && make $J V=1 -C tools/gnulib/lib
	make $J V=1
	make $J install DESTDIR=${ROOTFS}
	;;

     patch )
	srpm patch
	mcd $BUILDDIR/$1
	cat <<EOF > config.cache
ac_cv_func_strnlen_working=yes
EOF
	$SRC/${1}-*/configure $TCONFIGARGS --cache-file=config.cache
	notparallel
	make $J V=1
	make $J install DESTDIR=${ROOTFS}
	;;

     xz )
	srpm xz
	mcd $BUILDDIR/$1
	$SRC/${1}-*/configure \
	    --prefix=/usr \
	    --build=$BUILD \
	    --host=$TARGET \
	notparallel
	make $J V=1
	make $J install DESTDIR=${ROOTFS}
	;;

     unzip )
	srpm unzip
	mcd $BUILDDIR/$1
	rsync -av $SRC/unzip*/ ./
	make $J -f unix/Makefile \
	    CC=${TARGET}-gcc \
	    AS=${TARGET}-as \
	    AR=${TARGET}-ar \
	    STRIP=${TARGET}-strip \
	    RANLIB=${TARGET}-ranlib \
	    prefix=/usr \
	    generic
	make $J -f unix/Makefile \
	    CC=${TARGET}-gcc \
	    AS=${TARGET}-as \
	    AR=${TARGET}-ar \
	    STRIP=${TARGET}-strip \
	    RANLIB=${TARGET}-ranlib \
	    prefix=${ROOTFS}/usr \
	    install 
	;;

     coreutils )
	srpm coreutils
	mcd $BUILDDIR/$1
	$SRC/${1}-*/configure $TCONFIGARGS
	notparallel
	for i in $(cd $SRC/${1}-*/man; echo *.x)
	do
	    base=`echo $i | sed 's/\.x//'`
	    touch man/$base.1
	done
	make $J V=1
	make $J install DESTDIR=${ROOTFS}
	;;

     util-linux )
	srpm util-linux
	mcd $BUILDDIR/$1
	$SRC/${1}-*/configure $TCONFIGARGS --without-ncurses --disable-wall
	notparallel
	make $J V=1
	make $J install DESTDIR=${ROOTFS}
	;;

    bzip2 )
	srpm bzip2
	mcd $BUILDDIR/bzip2
	rsync -av $SRC/bzip2-*/ ./
	make $J \
	    CC=${TARGET}-gcc \
	    AR=${TARGET}-ar \
	    RANLIB=${TARGET}-ranlib \
	    libbz2.a bzip2 bzip2recover
	make $J \
	    CC=${TARGET}-gcc \
	    AR=${TARGET}-ar \
	    RANLIB=${TARGET}-ranlib \
	    PREFIX=${ROOTFS} \
	    install
	;;

    stage2 )
	# install source trees in rootfs, so stage2 will have them for
	# its builds.

	mkdirp $ROOTFS/stage2

	rsrpm cpio
	rsrpm ncurses
	rsrpm curl
	rsrpm m4
	rsrpm flex
	rsrpm bison
	rsrpm texinfo
	rsrpm gdb
	rsrpm nss-softokn
	rsrpm nspr
	rsrpm rpm

	cp $STAGE2 $ROOTFS/stage2/stage2

	(
	    echo TARGET=$TARGET
	    echo RPMTARGET=$RPMTARGET
	    echo TCONFIGARGS=\"$TCONFIGARGS\" \
		| sed 's/--build=[^ ]*//' \
		| sed 's/--host=[^ ]*//' \
		| sed 's/--target=[^ ]*//'
	) > $ROOTFS/stage2/local.conf

	;;

esac

exit 0