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#!/bin/bash
# Copyright 2008-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
if [[ $1 == "--help" || $1 == "-h" ]] ; then
cat <<-EOF
Usage: emerge-wrapper [--target <chost>] <--init|commands for cross-emerge>
emerge-wrapper is used in one of two ways:
- Use --init to setup cross-toolchain environment(s)
- Pass the command line through to cross-emerge
EOF
exit 0
fi
PREFIX="@PREFIX@"
# Enable this script to be manually installed while debugging
[[ ${PREFIX} == "@"PREFIX"@" ]] && PREFIX="/usr"
err() { echo "emerge-wrapper: ERROR: $*" 1>&2; exit 1; }
emit_setup_warning()
{
if ! ${setup_warning} ; then
setup_warning=true
echo "!!! WARNING - Cannot auto-configure CHOST ${CHOST};"
echo "!!! You should edit ${confs[*]}"
echo "!!! by hand to complete your configuration."
fi
echo "!!! $*"
}
cross_wrap_etc()
{
[[ $1 == "-q" ]] || echo "${CHOST}: setting up cross basics in ${SYSROOT}/etc"
setup_warning=false
cp -a "${PREFIX}"/share/crossdev/etc ${SYSROOT}/ || return 1
ln -snf "${MAIN_REPO_PATH}/profiles/embedded" "${SYSROOT}/etc/portage/make.profile" || return 1
local confs=(
${SYSROOT}/etc/portage/make.conf
${SYSROOT}/etc/portage/profile/make.defaults
${SYSROOT}/etc/portage/profile/use.force
)
# Re-use existing CHOST->portage ARCH mapping code
ARCH=$(
inherit() { :; }
die() { err "toolchain-funcs.eclass$*"; }
EAPI=7 . "${MAIN_REPO_PATH}"/eclass/toolchain-funcs.eclass
tc-arch
)
[[ $? -ne 0 ]] && err "Failed calling 'tc-arch' from toolchain-funcs.eclass."
[[ ${ARCH} == "unknown" ]] && emit_setup_warning "No ARCH is known for this target."
LIBC="__LIBC__"
case ${CHOST} in
*gnu*) LIBC=glibc ;;
*uclibc*) LIBC=uclibc-ng ;;
*musl*) LIBC=musl ;;
*cygwin*) LIBC=Cygwin ;;
*mingw*) LIBC=mingw ;;
*-newlib|*-elf|*-eabi) LIBC=newlib ;;
*) emit_setup_warning "No LIBC is known for this target." ;;
esac
KERNEL="__KERNEL__"
case ${CHOST} in
*linux*) KERNEL=linux ;;
*mingw*) KERNEL=Winnt ;;
*) emit_setup_warning "No KERNEL is known for this target." ;;
esac
if [[ -n ${KERNEL} ]]; then
USE_FORCE_KERNEL="kernel_${KERNEL}"
else
USE_FORCE_KERNEL=""
fi
sed -i \
-e "s:__LIBC__:${LIBC}:g" \
-e "s:__ARCH__:${ARCH}:g" \
-e "s:__KERNEL__:${KERNEL}:g" \
-e "s:__USE_FORCE_KERNEL__:${USE_FORCE_KERNEL}:g" \
-e "s:__CHOST__:${CHOST}:g" \
-e "s:__CBUILD__:${CBUILD}:g" \
"${confs[@]}"
if [[ "${LLVM}" == "yes" ]] ; then
cat <<-EOF >>${SYSROOT}/etc/portage/profile/make.defaults
AR=llvm-ar
AS=llvm-as
CC="${CHOST}-clang"
CROSS_COMPILE="${CHOST}-"
CXX="${CHOST}-clang++"
DLLTOOL=llvm-dlltool
HOSTCC="${CC:=clang}"
HOSTCXX="${CXX:=clang++}"
LD=ld.lld
LLVM=1
NM=llvm-nm
OBJCOPY=llvm-objcopy
RANLIB=llvm-ranlib
READELF=llvm-readelf
STRIP=llvm-strip
EOF
fi
return 0
}
cross_wrap_bin()
{
[[ $1 == "-q" ]] || echo "${CHOST}: Setting up symlinks"
pushd "${0%/*}" >/dev/null
local wrapper
for wrapper in ebuild emerge fix-root pkg-config ; do
ln -sf cross-${wrapper} ${CHOST}-${wrapper}
done
# some people like their tab completion
ln -sf cross-emerge emerge-${CHOST}
popd >/dev/null
}
cross_wrap()
{
SYSROOT=@GENTOO_PORTAGE_EPREFIX@/usr/${CHOST}
cross_wrap_bin "$@" || return $?
if [[ -d ${SYSROOT} ]] && [[ ! -d ${SYSROOT}/etc ]] ; then
cross_wrap_etc "$@"
fi
return $?
}
cross_init()
{
if [[ ${CHOST} == "wrapper" ]] ; then
err "missing --target <CHOST> option"
fi
# Initialize env for just one target. This is the automated behavior
# when crossdev is setting things up for people.
cross_wrap -q
}
# CBUILD must be the first thing we export, but might as well avoid
# running portageq multiple times ...
import_vars="DISTDIR MAKEOPTS GENTOO_MIRRORS"
eval $(portageq envvar -v CBUILD ${import_vars})
export CBUILD
MAIN_REPO_PATH=$(crossdev --show-repo-cfg MAIN_REPO_PATH)
# Get default CHOST value from program name
CHOST=${0##*/}
CHOST=${CHOST%-emerge}
CHOST=${CHOST#emerge-}
export CHOST
if [[ $1 == "--target" ]] ; then
CHOST=$2
shift 2
fi
if [[ $1 == "--init" ]] ; then
cross_init
exit $?
fi
if [[ $CHOST == "wrapper" ]] ; then
echo "After running this program with the --init option as root"
echo "you can call it directly like emerge-wrapper --target CHOST <emerge options>"
echo "or using the emerge-CHOST wrappers"
exit 1
fi
type -P -- ${CHOST}-gcc >/dev/null || err "you need to 'crossdev $CHOST' first"
exec cross-emerge "$@"
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