Comments
Patch
===================================================================
@@ -221,19 +221,7 @@
INCLUDES += -I$(top)/util/x86emu/include
INCLUDES += -include $(obj)/build.h
-try-run= $(shell set -e; \
-TMP=".$$$$.tmp"; \
-if ($(1)) > /dev/null 2>&1; \
-then echo "$(2)"; \
-else echo "$(3)"; \
-fi; rm -rf "$$TMP")
-
-cc-option= $(call try-run,\
-$(CC) $(1) -S -xc /dev/null -o "$$TMP", $(1), $(2))
-
-STACKPROTECT += $(call cc-option, -fno-stack-protector,)
-
-CFLAGS = $(STACKPROTECT) $(INCLUDES) -Os -nostdinc
+CFLAGS = $(INCLUDES) -Os -nostdinc
CFLAGS += -nostdlib -Wall -Wundef -Wstrict-prototypes -Wmissing-prototypes
CFLAGS += -Wwrite-strings -Wredundant-decls -Wno-trigraphs
CFLAGS += -Wstrict-aliasing -Wshadow
===================================================================
@@ -1,4 +1,32 @@
+#!/bin/sh
+#
+# This file is part of the coreboot project.
+#
+# Copyright (C) 2007-2010 coresystems GmbH
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+#
+testcc()
+{
+ echo "_start(void) {}" > .$$$$.c
+ $1 -nostdlib $2 .$$$$.c -o .$$$$.tmp 2>/dev/null >/dev/null
+ ret=$?
+ rm -f .$$$$.c .$$$$.tmp
+ return $ret
+}
+
for make in make gmake gnumake; do
if [ "`$make --version 2>/dev/null | grep -c GNU`" -gt 0 ]; then
MAKE=$make
@@ -8,39 +36,67 @@
GCCPREFIX=invalid
TMP=`mktemp /tmp/temp.XXXX 2>/dev/null || echo /tmp/temp.78gOIUGz`
-echo "mov %eax, %eax" > ${TMP}.s
-printf "\x7fELF\n" > ${TMP}.compare
-for gccprefixes in `pwd`/util/crossgcc/xgcc/bin/i386-elf- i386-elf- ""; do
- if which ${gccprefixes}as 2>/dev/null >/dev/null; then
- printf ""
- else
+touch $TMP
+
+# This should be a loop over all supported architectures
+TARCH=i386
+TWIDTH=32
+for gccprefixes in `pwd`/util/crossgcc/xgcc/bin/${TARCH}-elf- ${TARCH}-elf- ""; do
+ if ! which ${gccprefixes}as 2>/dev/null >/dev/null; then
continue
fi
rm -f ${TMP}.o
- if ${gccprefixes}as --32 -o ${TMP}.o ${TMP}.s; then
- cut -c-4 ${TMP}.o > ${TMP}.test 2>/dev/null
- if cmp ${TMP}.test ${TMP}.compare; then
+ if ${gccprefixes}as -o ${TMP}.o ${TMP}; then
+ TYPE=`${gccprefixes}objdump -p ${TMP}.o`
+ if [ ${TYPE##* } == "elf${TWIDTH}-${TARCH}" ]; then
GCCPREFIX=$gccprefixes
+ ASFLAGS=
+ CFLAGS=
+ LDFLAGS=
break
fi
fi
+ if ${gccprefixes}as --32 -o ${TMP}.o ${TMP}; then
+ TYPE=`${gccprefixes}objdump -p ${TMP}.o`
+ if [ ${TYPE##* } == "elf${TWIDTH}-${TARCH}" ]; then
+ GCCPREFIX=$gccprefixes
+ ASFLAGS=--32
+ CFLAGS="-m32 "
+ LDFLAGS="-b elf32-i386"
+ break
+ fi
+ fi
done
-rm -f $TMP ${TMP}.s ${TMP}.o ${TMP}.compare ${TMP}.test
+rm -f $TMP ${TMP}.o
if [ "$GCCPREFIX" = "invalid" ]; then
echo '$(error no suitable gcc found)'
exit 1
fi
-cat << afteroptions
-AS:=${GCCPREFIX}as --32
-CC:=${GCCPREFIX}gcc -m32
+CC="${GCCPREFIX}gcc"
+testcc "$CC" "$CFLAGS-fno-stack-protector " && CFLAGS="$CFLAGS-fno-stack-protector "
+testcc "$CC" "$CFLAGS-Wl,--build-id=none " && CFLAGS="$CFLAGS-Wl,--build-id=none "
+
+if which gcc 2>/dev/null >/dev/null; then
+ HOSTCC=gcc
+else
+ HOSTCC=cc
+fi
+
+cat << EOF
+# elf${TWIDTH}-${TARCH} toolchain
+AS:=${GCCPREFIX}as ${ASFLAGS}
+CC:=${GCCPREFIX}gcc ${CFLAGS}
CPP:=${GCCPREFIX}cpp
AR:=${GCCPREFIX}ar
-LD:=${GCCPREFIX}ld -b elf32-i386
+LD:=${GCCPREFIX}ld ${LDFLAGS}
STRIP:=${GCCPREFIX}strip
NM:=${GCCPREFIX}nm
OBJCOPY:=${GCCPREFIX}objcopy
OBJDUMP:=${GCCPREFIX}objdump
-HOSTCC:=gcc
-afteroptions
+
+# native toolchain
+HOSTCC:=${HOSTCC}
+EOF
+