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#!/bin/bash
#
# This file is part of the coreboot project.
#
# Copyright (C) 2007-2010 coresystems GmbH
# Copyright (C) 2012 Google Inc
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
TMPFILE=""
XGCCPATH=${1:-"`pwd`/util/crossgcc/xgcc/bin/"}
die() {
echo "ERROR: $*" >&2
exit 1
}
clean_up() {
if [ -n "$TMPFILE" ]; then
rm -f "$TMPFILE" "$TMPFILE.c" "$TMPFILE.o"
fi
}
# Create temporary file(s).
TMPFILE="$(mktemp /tmp/temp.XXXX 2>/dev/null || echo /tmp/temp.78gOIUGz)"
touch "$TMPFILE"
trap clean_up EXIT
program_exists() {
type "$1" >/dev/null 2>&1
}
if [ "$(${XGCCPATH}/iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
IASL=${XGCCPATH}iasl
elif [ "$(iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
IASL=iasl
else
die "no iasl found"
fi
if program_exists gcc; then
HOSTCC=gcc
elif program_exists cc; then
HOSTCC=cc
else
die "no host compiler found"
fi
cat <<EOF
# platform agnostic and host tools
IASL:=${IASL}
HOSTCC?=${HOSTCC}
EOF
testcc() {
local tmp_c="$TMPFILE.c"
local tmp_o="$TMPFILE.o"
rm -f "$tmp_c" "$tmp_o"
echo "void _start(void) {}" >"$tmp_c"
"$1" -nostdlib -Werror $2 "$tmp_c" -o "$tmp_o" >/dev/null 2>&1
}
testas() {
local gccprefix="$1"
local twidth="$2"
local arch="$3"
local use_dash_twidth="$4"
local endian="$5"
local obj_file="$TMPFILE.o"
local full_arch="elf$twidth-$arch"
rm -f "$obj_file"
[ -n "$use_dash_twidth" ] && use_dash_twidth="--$twidth"
[ -n "$endian" ] && endian="-$endian"
${gccprefix}as $use_dash_twidth $endian -o "$obj_file" $TMPFILE \
2>/dev/null || return 1
# Check output content type.
local obj_type="$(${gccprefix}objdump -p $obj_file)"
local obj_arch="$(expr "$obj_type" : '.*format \(.[a-z0-9-]*\)')"
[ "$obj_arch" = "$full_arch" ] || return 1
# Architecture matched.
GCCPREFIX="$gccprefix"
if [ -z "$use_dash_twidth" ]; then
ASFLAGS=""
CFLAGS=""
LDFLAGS=""
else
ASFLAGS="--$twidth"
CFLAGS="-m$twidth"
LDFLAGS="-b $full_arch"
fi
# Special parameters only available in dash_twidth mode.
[ -n "$use_dash_twidth" ] && case "$full_arch" in
"elf32-i386" )
LDFLAGS="$LDFLAGS -melf_i386"
CFLAGS="$CFLAGS -Wl,-b,elf32-i386 -Wl,-melf_i386"
;;
esac
return 0
}
detect_special_flags() {
local architecture="$1"
# GCC 4.6 is much more picky about unused variables.
# Turn off it's warnings for now:
testcc "$CC" "$CFLAGS -Wno-unused-but-set-variable " &&
CFLAGS="$CFLAGS -Wno-unused-but-set-variable "
# Use bfd linker instead of gold if available:
testcc "$CC" "$CFLAGS -fuse-ld=bfd" &&
CFLAGS="$CFLAGS -fuse-ld=bfd" && LINKER_SUFFIX='.bfd'
testcc "$CC" "$CFLAGS -fno-stack-protector"&&
CFLAGS="$CFLAGS -fno-stack-protector"
testcc "$CC" "$CFLAGS -Wl,--build-id=none" &&
CFLAGS="$CFLAGS -Wl,--build-id=none"
case "$architecture" in
x86)
testcc "$CC" "$CFLAGS -Wa,--divide" &&
CFLAGS="$CFLAGS -Wa,--divide"
# Always build for i686 -- no sse/mmx instructions since SMM
# modules are compiled using these flags. Note that this
# doesn't prevent a project using xcompile to explicitly
# specify -mmsse, etc flags.
CFLAGS="$CFLAGS -march=i686"
;;
mipsel)
testcc "$CC" "$CFLAGS -mno-abicalls -fno-pic" && \
CFLAGS+=" -mno-abicalls -fno-pic"
# Enforce little endian mode.
testcc "$CC" "$CFLAGS -EL" && \
CFLAGS+=" -EL"
;;
esac
}
report_arch_toolchain() {
cat <<EOF
# elf${TWIDTH}-${TBFDARCH} toolchain (${GCCPREFIX}gcc)
ARCH_SUPPORTED+=${TARCH}
SUBARCH_SUPPORTED+=${TSUPP-${TARCH}}
CC_${TARCH}:=${GCCPREFIX}gcc
CFLAGS_${TARCH}:=${CFLAGS}
CPP_${TARCH}:=${GCCPREFIX}cpp
AS_${TARCH}:=${GCCPREFIX}as ${ASFLAGS}
LD_${TARCH}:=${GCCPREFIX}ld${LINKER_SUFFIX} ${LDFLAGS}
NM_${TARCH}:=${GCCPREFIX}nm
OBJCOPY_${TARCH}:=${GCCPREFIX}objcopy
OBJDUMP_${TARCH}:=${GCCPREFIX}objdump
READELF_${TARCH}:=${GCCPREFIX}readelf
STRIP_${TARCH}:=${GCCPREFIX}strip
AR_${TARCH}:=${GCCPREFIX}ar
EOF
}
# Architecture definitions
SUPPORTED_ARCHITECTURES="arm arm64 mipsel riscv x86"
arch_config_arm() {
TARCH="arm"
TBFDARCHS="littlearm"
TCLIST="armv7a armv7-a"
TWIDTH="32"
TSUPP="arm armv4 armv7 armv7_m"
TABI="eabi"
}
arch_config_arm64() {
TARCH="arm64"
TBFDARCHS="littleaarch64"
TCLIST="aarch64"
TWIDTH="64"
TSUPP="arm64 armv8_64"
TABI="elf"
}
arch_config_riscv() {
TARCH="riscv"
TBFDARCHS="littleriscv"
TCLIST="riscv"
TWIDTH="64"
TABI="elf"
}
arch_config_x86() {
TARCH="x86_32"
TBFDARCHS="i386"
TCLIST="i386 x86_64"
TWIDTH="32"
TABI="elf"
}
arch_config_mipsel() {
TARCH="mips"
TBFDARCHS="tradlittlemips littlemips"
TCLIST="mipsel"
TWIDTH="32"
TSUPP="mips mipsel"
TABI="elf"
TENDIAN="EL"
}
test_architecture() {
local architecture=$1
local endian gccprefix search
GCCPREFIX="invalid"
unset TABI TARCH TBFDARCH TCLIST TENDIAN TSUPP TWIDTH
if type arch_config_$architecture > /dev/null; then
arch_config_$architecture
else
die "no architecture definition for $architecture"
fi
# To override toolchain, define CROSS_COMPILE_$arch or CROSS_COMPILE as
# environment variable.
# Ex: CROSS_COMPILE_arm="armv7a-cros-linux-gnueabi-"
# CROSS_COMPILE_x86="i686-pc-linux-gnu-"
search="$(eval echo \$CROSS_COMPILE_$architecture 2>/dev/null)"
search="$search $CROSS_COMPILE"
for toolchain in $TCLIST; do
search="$search $XGCCPATH$toolchain-$TABI-"
search="$search $toolchain-$TABI-"
search="$search $toolchain-linux-gnu-"
search="$search $toolchain-"
done
echo "# $architecture TARCH_SEARCH=$search"
# Search toolchain by checking assembler capability.
for TBFDARCH in $TBFDARCHS; do
for gccprefix in $search ""; do
program_exists "${gccprefix}as" || continue
for endian in $TENDIAN ""; do
testas "$gccprefix" "$TWIDTH" "$TBFDARCH" \
"" "$endian" && return 0
testas "$gccprefix" "$TWIDTH" "$TBFDARCH" \
"TRUE" "$endian" && return 0
done
done
done
echo "Warning: no suitable GCC for $architecture." >&2
return 1
}
# This loops over all supported architectures.
for architecture in $SUPPORTED_ARCHITECTURES; do
if test_architecture $architecture; then
CC="${GCCPREFIX}"gcc
detect_special_flags "$architecture"
report_arch_toolchain
fi
done
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