arch/ia64/scripts/toolchain-flags

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 #
   4 # Check whether linker can handle cross-segment @segrel():
   5 #
   6 CPPFLAGS=""
   7 CC=$1
   8 OBJDUMP=$2
   9 READELF=$3
  10 dir=$(dirname $0)
  11 tmp=${TMPDIR:-/tmp}
  12 out=$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 $out
  18 res=$($OBJDUMP --full --section .rodata $out | fgrep 000 | cut -f3 -d' ')
  19 rm -f $out
  20 if [ $res != 00000a00 ]; then
  21     CPPFLAGS="$CPPFLAGS -DHAVE_BUGGY_SEGREL"
  22     cat >&2 <<EOF
  23 warning: 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).
  26 EOF
  27 fi
  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 $out | fgrep -q 'prologue(rlen=12)'
  33 res=$?
  34 rm -f $out
  35 if [ $res -eq 0 ]; then
  36     CPPFLAGS="$CPPFLAGS -DHAVE_WORKING_TEXT_ALIGN"
  37 fi
  38
  39 if ! $CC -c $dir/check-model.c -o $out 2>&1 | grep  __model__ | grep -q attrib
  40 then
  41     CPPFLAGS="$CPPFLAGS -DHAVE_MODEL_SMALL_ATTRIBUTE"
  42 fi
  43 rm -f $out
  44
  45 # Check whether assembler supports .serialize.{data,instruction} directive.
  46
  47 $CC -c $dir/check-serialize.S -o $out 2>/dev/null
  48 res=$?
  49 rm -f $out
  50 if [ $res -eq 0 ]; then
  51     CPPFLAGS="$CPPFLAGS -DHAVE_SERIALIZE_DIRECTIVE"
  52 fi
  53
  54 echo $CPPFLAGS