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|
#!/bin/sh
#
# 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=""
die() {
echo "ERROR: $*" >&2
exit 1
}
clean_up() {
if [ -n "$TMPFILE" ]; then
rm -f "$TMPFILE" "$TMPFILE.c" "$TMPFILE.o"
fi
}
program_exists() {
type "$1" >/dev/null 2>&1
}
testcc() {
local tmp_c="$TMPFILE.c"
local tmp_o="$TMPFILE.o"
rm -f "$tmp_c" "$tmp_o"
echo "_start(void) {}" >"$tmp_c"
"$1" -nostdinc -nostdlib -Werror $2 "$tmp_c" -o "$tmp_o" >/dev/null 2>&1
}
testas() {
local gccprefixes="$1"
local twidth="$2"
local arch="$3"
local use_dash_twidth="$4"
local obj_file="$TMPFILE.o"
local full_arch="elf$twidth-$arch"
rm -f "$obj_file"
[ -n "$use_dash_twidth" ] && use_dash_twidth="--$twidth"
${gccprefixes}as $use_dash_twidth -o "$obj_file" $TMPFILE 2>/dev/null ||
return 1
# Check output content type.
local obj_type="$(${gccprefixes}objdump -p $obj_file)"
local obj_arch="$(expr "$obj_type" : '.*format \(.[a-z0-9-]*\)')"
[ "$obj_arch" = "$full_arch" ] || return 1
# Architecture matched.
GCCPREFIX="$gccprefixes"
if [ -z "$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" "$CFLAGS -Wa,--divide" &&
CFLAGS="$CFLAGS -Wa,--divide"
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 "$architecture" in
arm )
# testcc "$CC" "$CFLAGS -mcpu=cortex-a9" &&
# CFLAGS="$CFLAGS -mcpu=cortex-a9"
;;
esac
}
report_arch_toolchain() {
cat <<EOF
# elf${TWIDTH}-${TBFDARCH} toolchain (${GCCPREFIX}gcc)
CC_${TARCH}:=${GCCPREFIX}gcc ${CFLAGS}
AS_${TARCH}:=${GCCPREFIX}as ${ASFLAGS}
LD_${TARCH}:=${GCCPREFIX}ld ${LDFLAGS}
NM_${TARCH}:=${GCCPREFIX}nm
OBJCOPY_${TARCH}:=${GCCPREFIX}objcopy
OBJDUMP_${TARCH}:=${GCCPREFIX}objdump
READELF_${TARCH}:=${GCCPREFIX}readelf
STRIP_${TARCH}:=${GCCPREFIX}strip
AR_${TARCH}:=${GCCPREFIX}ar
EOF
}
# Create temporary file(s).
TMPFILE="$(mktemp /tmp/temp.XXXX 2>/dev/null || echo /tmp/temp.78gOIUGz)"
touch "$TMPFILE"
trap clean_up EXIT
# Architecture definition
SUPPORTED_ARCHITECTURE="x86 arm"
# ARM Architecture
TARCH_arm="arm"
TBFDARCH_arm="littlearm"
TCLIST_arm="armv7a"
TWIDTH_arm="32"
# X86 Architecture
TARCH_x86="i386"
TBFDARCH_x86="i386"
TCLIST_x86="i386 x86_64"
TWIDTH_x86="32"
XGCCPATH=${1:-"`pwd`/../../util/crossgcc/xgcc/bin/"}
# This loops over all supported architectures.
for architecture in $SUPPORTED_ARCHITECTURE; do
GCCPREFIX="invalid"
TARCH="$(eval echo \$TARCH_$architecture)"
TBFDARCH="$(eval echo \$TBFDARCH_$architecture)"
TCLIST="$(eval echo \$TCLIST_$architecture)"
TWIDTH="$(eval echo \$TWIDTH_$architecture)"
[ -z "$TARCH" -o -z "$TCLIST" -o -z "$TWIDTH" ] &&
die "Missing architecture definition for $architecture."
# To override toolchain, define CROSS_COMPILE_$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-elf-"
search="$search $toolchain-elf-"
search="$search $XGCCPATH$toolchain-eabi-"
search="$search $toolchain-eabi-"
done
echo "# $architecture TARCH_SEARCH=$search"
# Search toolchain by checking assembler capability.
for gccprefixes in $search ""; do
program_exists "${gccprefixes}as" || continue
testas "$gccprefixes" "$TWIDTH" "$TBFDARCH" "" && break
testas "$gccprefixes" "$TWIDTH" "$TBFDARCH" "TRUE" && break
done
if [ "$GCCPREFIX" = "invalid" ]; then
echo "Warning: no suitable GCC for $architecture." >&2
continue
fi
CC="${GCCPREFIX}"gcc
detect_special_flags "$architecture"
report_arch_toolchain
done
if [ "$(${XGCCPATH}/iasl 2>/dev/null | grep -c ACPI)" -gt 0 ]; then
IASL=${XGCCPATH}iasl
else
IASL=iasl
fi
if program_exists gcc; then
HOSTCC=gcc
else
HOSTCC=cc
fi
cat <<EOF
IASL:=${IASL}
# native toolchain
HOSTCC:=${HOSTCC}
EOF
|
