toolchain-flags (1432B)
1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0 3# 4# Check whether linker can handle cross-segment @segrel(): 5# 6CPPFLAGS="" 7CC=$1 8OBJDUMP=$2 9READELF=$3 10dir=$(dirname $0) 11tmp=${TMPDIR:-/tmp} 12out=$tmp/out$$ 13 14# Check whether cross-segment segment-relative relocs work fine. We need 15# that for building the gate DSO: 16 17$CC -nostdlib -static -Wl,-T$dir/check-segrel.lds $dir/check-segrel.S -o $out 18res=$($OBJDUMP --full --section .rodata $out | fgrep 000 | cut -f3 -d' ') 19rm -f $out 20if [ $res != 00000a00 ]; then 21 CPPFLAGS="$CPPFLAGS -DHAVE_BUGGY_SEGREL" 22 cat >&2 <<EOF 23warning: your linker cannot handle cross-segment segment-relative relocations. 24 please upgrade to a newer version (it is safe to use this linker, but 25 the kernel will be bigger than strictly necessary). 26EOF 27fi 28 29# Check whether .align inside a function works as expected. 30 31$CC -c $dir/check-text-align.S -o $out 32$READELF -u $out | fgrep -q 'prologue(rlen=12)' 33res=$? 34rm -f $out 35if [ $res -eq 0 ]; then 36 CPPFLAGS="$CPPFLAGS -DHAVE_WORKING_TEXT_ALIGN" 37fi 38 39if ! $CC -c $dir/check-model.c -o $out 2>&1 | grep __model__ | grep -q attrib 40then 41 CPPFLAGS="$CPPFLAGS -DHAVE_MODEL_SMALL_ATTRIBUTE" 42fi 43rm -f $out 44 45# Check whether assembler supports .serialize.{data,instruction} directive. 46 47$CC -c $dir/check-serialize.S -o $out 2>/dev/null 48res=$? 49rm -f $out 50if [ $res -eq 0 ]; then 51 CPPFLAGS="$CPPFLAGS -DHAVE_SERIALIZE_DIRECTIVE" 52fi 53 54echo $CPPFLAGS