glibc/sysdeps/arm/configure

# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
 # Local configure fragment for sysdeps/arm.

# We check to see if the compiler and flags are
# selecting the hard-float ABI and if they are then
# we set libc_cv_arm_pcs_vfp to yes which causes
# HAVE_ARM_PCS_VFP to be defined in config.h and
# in include/libc-symbols.h and thus available to
# shlib-versions to select the appropriate name for
# the dynamic linker via %ifdef.


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
if ${ac_cv_path_GREP+:} false; then :
  $as_echo_n "(cached) " >&6
else
  if test -z "$GREP"; then
  ac_path_GREP_found=false
  # Loop through the user's path and test for each of PROGNAME-LIST
  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
    for ac_prog in grep ggrep; do
    for ac_exec_ext in '' $ac_executable_extensions; do
      ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
      as_fn_executable_p "$ac_path_GREP" || continue
# Check for GNU ac_path_GREP and select it if it is found.
  # Check for GNU $ac_path_GREP
case `"$ac_path_GREP" --version 2>&1` in
*GNU*)
  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
*)
  ac_count=0
  $as_echo_n 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    $as_echo 'GREP' >> "conftest.nl"
    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
    as_fn_arith $ac_count + 1 && ac_count=$as_val
    if test $ac_count -gt ${ac_path_GREP_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_GREP="$ac_path_GREP"
      ac_path_GREP_max=$ac_count
    fi
    # 10*(2^10) chars as input seems more than enough
    test $ac_count -gt 10 && break
  done
  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac

      $ac_path_GREP_found && break 3
    done
  done
  done
IFS=$as_save_IFS
  if test -z "$ac_cv_path_GREP"; then
    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  fi
else
  ac_cv_path_GREP=$GREP
fi

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
$as_echo "$ac_cv_path_GREP" >&6; }
 GREP="$ac_cv_path_GREP"


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
$as_echo_n "checking for egrep... " >&6; }
if ${ac_cv_path_EGREP+:} false; then :
  $as_echo_n "(cached) " >&6
else
  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
   then ac_cv_path_EGREP="$GREP -E"
   else
     if test -z "$EGREP"; then
  ac_path_EGREP_found=false
  # Loop through the user's path and test for each of PROGNAME-LIST
  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
  IFS=$as_save_IFS
  test -z "$as_dir" && as_dir=.
    for ac_prog in egrep; do
    for ac_exec_ext in '' $ac_executable_extensions; do
      ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
      as_fn_executable_p "$ac_path_EGREP" || continue
# Check for GNU ac_path_EGREP and select it if it is found.
  # Check for GNU $ac_path_EGREP
case `"$ac_path_EGREP" --version 2>&1` in
*GNU*)
  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
*)
  ac_count=0
  $as_echo_n 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    $as_echo 'EGREP' >> "conftest.nl"
    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
    as_fn_arith $ac_count + 1 && ac_count=$as_val
    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_EGREP="$ac_path_EGREP"
      ac_path_EGREP_max=$ac_count
    fi
    # 10*(2^10) chars as input seems more than enough
    test $ac_count -gt 10 && break
  done
  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
esac

      $ac_path_EGREP_found && break 3
    done
  done
  done
IFS=$as_save_IFS
  if test -z "$ac_cv_path_EGREP"; then
    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  fi
else
  ac_cv_path_EGREP=$EGREP
fi

   fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
$as_echo "$ac_cv_path_EGREP" >&6; }
 EGREP="$ac_cv_path_EGREP"


{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler is using the ARM hard-float ABI" >&5
$as_echo_n "checking whether the compiler is using the ARM hard-float ABI... " >&6; }
if ${libc_cv_arm_pcs_vfp+:} false; then :
  $as_echo_n "(cached) " >&6
else
  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */
#ifdef __ARM_PCS_VFP
		      yes
		     #endif

_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  $EGREP "yes" >/dev/null 2>&1; then :
  libc_cv_arm_pcs_vfp=yes
else
  libc_cv_arm_pcs_vfp=no
fi
rm -f conftest*

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_pcs_vfp" >&5
$as_echo "$libc_cv_arm_pcs_vfp" >&6; }
if test $libc_cv_arm_pcs_vfp = yes; then
  $as_echo "#define HAVE_ARM_PCS_VFP 1" >>confdefs.h

  config_vars="$config_vars
default-abi = hard"
else
  config_vars="$config_vars
default-abi = soft"
fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether PC-relative relocs in movw/movt work properly" >&5
$as_echo_n "checking whether PC-relative relocs in movw/movt work properly... " >&6; }
if ${libc_cv_arm_pcrel_movw+:} false; then :
  $as_echo_n "(cached) " >&6
else

cat > conftest.s <<\EOF
	.syntax unified
	.arm
	.arch armv7-a

	.text
	.globl foo
	.type foo,%function
foo:	movw r0, #:lower16:symbol - 1f - 8
	movt r0, #:upper16:symbol - 1f - 8
1:	add r0, pc
	@ And now a case with a local symbol.
	movw r0, #:lower16:3f - 2f - 8
	movt r0, #:upper16:3f - 2f - 8
2:	add r0, pc
	bx lr

.data
	.globl symbol
	.hidden symbol
symbol:	.long 23
3:	.long 17
EOF
libc_cv_arm_pcrel_movw=no
${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \
	 -nostartfiles -nostdlib -shared \
	 -o conftest.so conftest.s 1>&5 2>&5 &&
LC_ALL=C $READELF -dr conftest.so > conftest.dr 2>&5 &&
{
  cat conftest.dr 1>&5
  fgrep 'TEXTREL
R_ARM_NONE' conftest.dr > /dev/null || libc_cv_arm_pcrel_movw=yes
}
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_pcrel_movw" >&5
$as_echo "$libc_cv_arm_pcrel_movw" >&6; }
if test $libc_cv_arm_pcrel_movw = yes; then
  $as_echo "#define ARM_PCREL_MOVW_OK 1" >>confdefs.h

fi

# This was buggy in assemblers from GNU binutils versions before 2.25.1
# (it's known to be broken in 2.24 and 2.25; see
# https://sourceware.org/bugzilla/show_bug.cgi?id=18383).
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether TPOFF relocs with addends are assembled correctly" >&5
$as_echo_n "checking whether TPOFF relocs with addends are assembled correctly... " >&6; }
if ${libc_cv_arm_tpoff_addend+:} false; then :
  $as_echo_n "(cached) " >&6
else

cat > conftest.s <<\EOF
	.syntax unified
	.arm
	.arch armv7-a

	.text
foo:
	.word tbase(tpoff)+4

	.section .tdata,"awT",%progbits
	.word -4
tbase:	.word 0
	.word 4
EOF
libc_cv_arm_tpoff_addend=no
${CC-cc} -c $CFLAGS $CPPFLAGS \
	 -o conftest.o conftest.s 1>&5 2>&5 &&
LC_ALL=C $READELF -x.text conftest.o > conftest.x 2>&5 &&
{
  cat conftest.x 1>&5
  $AWK 'BEGIN { result = 2 }
$1 ~ /0x0+/ && $2 ~ /[0-9a-f]+/ {
# Check for little-endian or big-endian encoding of 4 in the in-place addend.
  result = ($2 == "04000000" || $2 == "00000004") ? 0 : 1
}
END { exit(result) }
' conftest.x 2>&5 && libc_cv_arm_tpoff_addend=yes
}
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_arm_tpoff_addend" >&5
$as_echo "$libc_cv_arm_tpoff_addend" >&6; }
if test $libc_cv_arm_tpoff_addend = no; then
  config_vars="$config_vars
test-xfail-tst-tlsalign = yes"
  config_vars="$config_vars
test-xfail-tst-tlsalign-static = yes"
fi


libc_cv_gcc_unwind_find_fde=no

# Remove -fno-unwind-tables that was added in sysdeps/arm/preconfigure.ac.
CFLAGS=${CFLAGS% -fno-unwind-tables}