# $Header: /magellan-cvs/smage/include/cross_tools.sminc,v 1.1 2005/12/24 14:03:26 niro Exp $
# Cross-tools generic functions

# # needed vars
# TARGET_ARCH="i686"
# TARGET_CHOST="${TARGET_ARCH}-cross-linux-gnu"
# 
# PNAME="cross-tools-${TARGET_ARCH}"
# 
# # version of the compiler
# PVER="4.0.2"
# PBUILD="r2"
# 
# PCATEGORIE="dev-misc"
# STATE="unstable"
# 
# DESCRIPTION="A crosscompile toolchain to compile programms for the ${TARGET_ARCH} arch."
# HOMEPAGE="http://magellan-linux.de/"
# 
# DEPEND=""
# 
# # binutils
# BINUTILS_PVER="2.16.91.0.3"
# BINUTILS_SRCFILE="binutils-${BINUTILS_PVER}.tar.bz2"
# BINUTILS_SRCDIR="${BUILDDIR}/binutils-${BINUTILS_PVER}"
# 
# # kernel-headers
# LINUX_HEADERS_PVER="2.6.12.0"
# LINUX_HEADERS_SRCFILE="linux-libc-headers-${LINUX_HEADERS_PVER}.tar.bz2"
# LINUX_HEADERS_SRCDIR="${BUILDDIR}/linux-libc-headers-${LINUX_HEADERS_PVER}"
# 
# # glibc-headers and libc
# GLIBC_PVER="2.3.5_20051107"
# GLIBC_SRCFILE="glibc-${GLIBC_PVER/*_/}.tar.bz2"
# GLIBC_LINUXTHREADS="glibc-linuxthreads-${GLIBC_PVER/*_/}.tar.bz2"
# GLIBC_SRCDIR="${BUILDDIR}/glibc-${GLIBC_PVER/*_/}"
# 
# # gcc
# GCC_PVER="${PVER}"
# GCC_SRCFILE="gcc-${GCC_PVER}.tar.bz2"
# GCC_SRCDIR="${BUILDDIR}/gcc-${GCC_PVER}"
# 
# # TARGET_DEST dir
# TARGET_DEST=/opt/cross-tools
# 

# do not get the idea to strip the resulting binaries!
# you must have build the strip program on the same arch,
# but this is propably not the case. so we force stripping off.
NOSTRIP=true

binutils_src_prepare()
{
	munpack ${BINUTILS_SRCFILE} || die
	install -d ${BINUTILS_SRCDIR}/build || die
}

binutils_src_compile()
{
	cd ${BINUTILS_SRCDIR}/build

	../configure \
		--host=${CHOST} \
		--target=${TARGET_CHOST} \
		--prefix=${TARGET_DEST} \
		--with-lib-path=${TARGET_DEST}/lib \
		--disable-nls \
		--enable-shared \
		--enable-64-bit-bfd \
		|| die

	make configure-host || die
	mmake || die
}

binutils_src_install()
{
	cd ${BINUTILS_SRCDIR}/build

	make install || die

	install -d ${TARGET_DEST}/include || die
	cp ../include/libiberty.h ${TARGET_DEST}/include || die
}

linux_headers_src_prepare()
{
	munpack ${LINUX_HEADERS_SRCFILE} || die
	cd ${LINUX_HEADERS_SRCDIR}

	# set correct permissions
	chown -R root:root * || die
	chmod -R a+r-w+X,u+w * || die
}

linux_headers_src_install()
{
	cd ${LINUX_HEADERS_SRCDIR}

	# using correct arch
	local myarch=${TARGET_ARCH}
	[[ ${myarch} = i?86 ]] && myarch=i386

	# needed directories
	install -d ${TARGET_DEST}/include/{asm,linux} || die

	cp -ax ${LINUX_HEADERS_SRCDIR}/include/linux/* \
		${TARGET_DEST}/include/linux || die
	cp -ax ${LINUX_HEADERS_SRCDIR}/include/asm-${myarch}/* \
		${TARGET_DEST}/include/asm || die
}

# building the glibc-headers
glibc_headers_src_prepare()
{
	glibc_generic_src_prepare
	cd ${GLIBC_SRCDIR}/build

	# remove gcc dependencies
	sed -i 's/3.4/3.[0-9]/g' ../configure || die
}

glibc_headers_src_compile()
{
	cd ${GLIBC_SRCDIR}/build

	# do not enable addons here
	../configure \
		--host=${CHOST} \
		--target=${TARGET_CHOST} \
		--prefix=${TARGET_DEST} \
		--enable-kernel=2.6.0 \
		--without-cvs \
		--with-headers=${TARGET_DEST}/include \
		--with-binutils=${TARGET_DEST}/${TARGET_CHOST}/bin \
		--disable-sanity-checks \
		--disable-nls \
		|| die
}

glibc_headers_src_install()
{
	cd ${GLIBC_SRCDIR}/build
	make install-headers || die

	# needed directories
	install -d ${TARGET_DEST}/include/{bits,gnu} || die

	# using correct arch
	local myarch=${TARGET_ARCH}
	[[ ${myarch} = i?86 ]] && myarch=i386

	# missing headers
	cp bits/stdio_lim.h ${TARGET_DEST}/include/bits || die
	touch ${TARGET_DEST}/include/gnu/stubs.h || die
	cp ../nptl/sysdeps/pthread/pthread.h ${TARGET_DEST}/include || die
	cp ../nptl/sysdeps/unix/sysv/linux/${myarch}/bits/pthreadtypes.h \
		${TARGET_DEST}/include || die
}

# generic glibc unpack
glibc_generic_src_prepare()
{
	munpack ${GLIBC_SRCFILE} || die
	cd ${GLIBC_SRCDIR}

	# disable binutils -as-needed
	sed -i 's/^have-as-needed.*/have-as-needed = no/' \
		${GLIBC_SRCDIR}/config.make.in || die

	# fix permissions on some of the scripts
	chmod u+x ${GLIBC_SRCDIR}/scripts/*.sh || die

	install -d ${GLIBC_SRCDIR}/build || die
}

# final glibc
glibc_src_prepare()
{
	glibc_generic_src_prepare
}

glibc_src_compile()
{
	cd ${GLIBC_SRCDIR}/build

	# force nptl support (may not detected always)
	echo "libc_cv_forced_unwind=yes" > config.cache || die
	echo "libc_cv_c_cleanup=yes" >> config.cache || die

	BUILD_CC="gcc" \
	CC="${TARGET_CHOST}-gcc -m32" \
	AR="${TARGET_CHOST}-ar" \
	RANLIB="${TARGET_CHOST}-ranlib" \
	../configure \
		--host=${TARGET_CHOST} \
		--build=${CHOST} \
		--prefix=${TARGET_DEST} \
		--disable-profile \
		--enable-add-ons=nptl --with-tls \
		--with-__thread \
		--enable-kernel=2.6.0 \
		--without-cvs \
		--with-headers=${TARGET_DEST}/include \
		--with-binutils=${TARGET_DEST}/${TARGET_CHOST}/bin \
		--cache-file=config.cache \
		|| die

	make PARALLELMFLAGS="-j2" || die
}

glibc_src_install()
{
	cd ${GLIBC_SRCDIR}/build
	make install || die
}

# static gcc, only c
gcc_static_src_prepare()
{
	gcc_generic_src_prepare
}

gcc_static_src_compile()
{
	cd ${GCC_SRCDIR}/build

	../configure \
		--host=${CHOST} \
		--target=${TARGET_CHOST} \
		--prefix=${TARGET_DEST} \
		--with-local-prefix=${TARGET_DEST} \
		--disable-nls \
		--disable-shared \
		--disable-threads \
		--enable-languages=c \
		--disable-multilib \
		|| die

	mmake all-gcc || die
}

gcc_static_src_install()
{
	cd ${GCC_SRCDIR}/build
	make install-gcc || die
}

# final gcc, c and c++
gcc_src_prepare()
{
	gcc_generic_src_prepare
	cd ${GCC_SRCDIR}

	# disable -B in configure, so it doesn't pick up the host's header files
	sed -i '/FLAGS_FOR_TARGET.*\/lib\//s@-B[^ ]*/lib/@@g' configure || die
}

gcc_src_compile()
{
	cd ${GCC_SRCDIR}/build

	../configure \
		--host=${CHOST} \
		--target=${TARGET_CHOST} \
		--prefix=${TARGET_DEST} \
		--with-local-prefix=${TARGET_DEST} \
		--enable-shared \
		--enable-threads=posix \
		--enable-__cxa_atexit \
		--enable-c99 \
		--enable-long-long \
		--enable-languages=c,c++ \
		--disable-nls \
		--disable-multilib \
		|| die
		#--with-system-zlib \
		#--enable-clocale=gnu \
		#--disable-checking \
		#--disable-libunwind-exceptions \
		#--enable-cstdio=stdio \

	make \
		AS_FOR_TARGET="${TARGET_DEST}/bin/${TARGET_CHOST}-as" \
		LD_FOR_TARGET="${TARGET_DEST}/bin/${TARGET_CHOST}-ld" \
		|| die
}

gcc_src_install()
{
	cd ${GCC_SRCDIR}/build
	make install || die
}

gcc_generic_src_prepare()
{
	munpack ${GCC_SRCFILE} || die
	cd ${GCC_SRCDIR}

	# suppress installation of libiberty, as we will be
	# using the one from binutils
	#sed -i 's/install_to_$(INSTALL_DEST) //' libiberty/Makefile.in || die

	# fix up the startfile spec to search /opt/cross-tools/lib
	# fixes errors like this on the final cross-gcc compilation
	#   /opt/cross-tools/i686-cross-linux-gnu/bin/ld: crti.o: No such file: No such file or directory
	#   collect2: ld returned 1 exit status
	echo "
#undef STARTFILE_PREFIX_SPEC
#define STARTFILE_PREFIX_SPEC \"${TARGET_DEST}/lib/\"" >> ${GCC_SRCDIR}/gcc/config/linux.h || die

	# change header search path to look only in $TARGET_DEST/include
	# and not the hosts own include pathes
	sed -i "s@\(^CROSS_SYSTEM_HEADER_DIR =\).*@\1 ${TARGET_DEST}/include@g" \
		${GCC_SRCDIR}/gcc/Makefile.in || die

	install -d ${GCC_SRCDIR}/build || die
}

cross_tools_src_prepare()
{
	if [[ -e ${TARGET_DEST} ]] || [[ -L ${TARGET_DEST} ]]
	then
		echo
		echo "Please uninstall any cross-tools packages first."
		echo "To build the tools I'll create a fake symlink to ${TARGET_DEST},"
		echo "so this directory must not exist."
		echo
		die "${TARGET_DEST} exists."
	fi

	if [[ ${CHOST} = ${TARGET_CHOST} ]]
	then
		echo
		echo "\$CHOST and \$TARGET_CHOST have the same values."
		echo "     CHOST=${CHOST}"
		echo "     TARGET_CHOST=${TARGET_CHOST}"
		echo
		echo "You cannot build a cross-compiler with these settings,"
		echo "please use the native gcc-\${ARCH} builds."
		echo
		die "\$CHOST equal \$TARGET_CHOST."
	fi

	# create a fake build-root
	install -d ${BINDIR}/${TARGET_DEST} || die
	ln -snf ${BINDIR}/${TARGET_DEST} ${TARGET_DEST} || die
}

cross_tools_src_compile()
{
	# setup a proper build environment
	export PATH=${TARGET_DEST}/bin:${PATH}

	##############################
	# first of all build binutils#
	##############################
	binutils_src_prepare
	binutils_src_compile
	binutils_src_install


	#################################
	# now install the linux-headers #
	#################################
	linux_headers_src_prepare
	linux_headers_src_install


	############################
	# create the glibc-headers #
	############################
	glibc_headers_src_prepare
	glibc_headers_src_compile
	glibc_headers_src_install

	# remove GLIBC_SRCDIR
	rm -rf ${GLIBC_SRCDIR} || die


	##############################
	# build a static minimal gcc #
	##############################
	gcc_static_src_prepare
	gcc_static_src_compile
	gcc_static_src_install

	# remove GCC_SRCDIR
	rm -rf ${GCC_SRCDIR} || die


	################################
	# build the final cross-glibc  #
	################################
	glibc_src_prepare
	glibc_src_compile
	glibc_src_install


	##############################
	# build the final cross-gcc  #
	##############################
	gcc_src_prepare
	gcc_src_compile
	gcc_src_install
}

cross_tools_src_install()
{
	# remove unneeded man and info pages to save some space
	local dir
	for dir in info man
	do
		[ -d ${BINDIR}/${dir} ] && { rm -rf ${BINDIR}/${dir} || die; }
	done

	# remove ${TARGET_DEST} fake root symlink
	[[ -L ${TARGET_DEST} ]] && { rm ${TARGET_DEST} || die; }

#	# setup environment
#	install -d ${BINDIR}/etc/env.d || die
#
#	echo "PATH=${TARGET_DEST}/bin" > ${BINDIR}/etc/env.d/99cross-${TARGET_ARCH} || die
#	echo "ROOTPATH=${TARGET_DEST}/bin" >> ${BINDIR}/etc/env.d/99cross-${TARGET_ARCH} || die
#	echo "LDPATH=${TARGET_DEST}/lib" >> ${BINDIR}/etc/env.d/99cross-${TARGET_ARCH} || die

	echo "Building of ${PNAME}-toolchain finished ..."
}

export_inherits cross_tools src_prepare src_compile src_install