glibc/sysdeps/aarch64/configure

# This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
 # Local configure fragment for sysdeps/aarch64.

# Static PIE is supported.
printf "%s\n" "#define SUPPORT_STATIC_PIE 1" >>confdefs.h


# We check to see if the compiler and flags are
# selecting the big endian ABI and if they are then
# we set libc_cv_aarch64_be to yes which causes
# HAVE_AARCH64_BE 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.


{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep -e" >&5
printf %s "checking for egrep -e... " >&6; }
if test ${ac_cv_path_EGREP_TRADITIONAL+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e) if test -z "$EGREP_TRADITIONAL"; then
  ac_path_EGREP_TRADITIONAL_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
  case $as_dir in #(((
    '') as_dir=./ ;;
    */) ;;
    *) as_dir=$as_dir/ ;;
  esac
    for ac_prog in grep ggrep
   do
    for ac_exec_ext in '' $ac_executable_extensions; do
      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
  # Check for GNU $ac_path_EGREP_TRADITIONAL
case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
*GNU*)
  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
#(
*)
  ac_count=0
  printf %s 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
    "$ac_path_EGREP_TRADITIONAL" -E 'EGR(EP|AC)_TRADITIONAL$' < "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 ${ac_path_EGREP_TRADITIONAL_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
      ac_path_EGREP_TRADITIONAL_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

      $ac_path_EGREP_TRADITIONAL_found && break 3
    done
  done
  done
IFS=$as_save_IFS
  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
    :
  fi
else
  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
fi

    if test "$ac_cv_path_EGREP_TRADITIONAL"
then :
  ac_cv_path_EGREP_TRADITIONAL="$ac_cv_path_EGREP_TRADITIONAL -E"
else case e in #(
  e) if test -z "$EGREP_TRADITIONAL"; then
  ac_path_EGREP_TRADITIONAL_found=false
  # Loop through the user's path and test for each of PROGNAME-LIST
  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
do
  IFS=$as_save_IFS
  case $as_dir in #(((
    '') as_dir=./ ;;
    */) ;;
    *) as_dir=$as_dir/ ;;
  esac
    for ac_prog in egrep
   do
    for ac_exec_ext in '' $ac_executable_extensions; do
      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
  # Check for GNU $ac_path_EGREP_TRADITIONAL
case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
*GNU*)
  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
#(
*)
  ac_count=0
  printf %s 0123456789 >"conftest.in"
  while :
  do
    cat "conftest.in" "conftest.in" >"conftest.tmp"
    mv "conftest.tmp" "conftest.in"
    cp "conftest.in" "conftest.nl"
    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
    "$ac_path_EGREP_TRADITIONAL" 'EGR(EP|AC)_TRADITIONAL$' < "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 ${ac_path_EGREP_TRADITIONAL_max-0}; then
      # Best one so far, save it but keep looking for a better one
      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
      ac_path_EGREP_TRADITIONAL_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

      $ac_path_EGREP_TRADITIONAL_found && break 3
    done
  done
  done
IFS=$as_save_IFS
  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
    as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  fi
else
  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
fi
 ;;
esac
fi ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP_TRADITIONAL" >&5
printf "%s\n" "$ac_cv_path_EGREP_TRADITIONAL" >&6; }
 EGREP_TRADITIONAL=$ac_cv_path_EGREP_TRADITIONAL

{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for big endian" >&5
printf %s "checking for big endian... " >&6; }
if test ${libc_cv_aarch64_be+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */
#ifdef __AARCH64EB__
                      yes
                     #endif

_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  $EGREP_TRADITIONAL "yes" >/dev/null 2>&1
then :
  libc_cv_aarch64_be=yes
else case e in #(
  e) libc_cv_aarch64_be=no ;;
esac
fi
rm -rf conftest*
 ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
printf "%s\n" "$libc_cv_aarch64_be" >&6; }
if test $libc_cv_aarch64_be = yes; then
  printf "%s\n" "#define HAVE_AARCH64_BE 1" >>confdefs.h

  config_vars="$config_vars
default-abi = lp64_be"
else
  config_vars="$config_vars
default-abi = lp64"
fi

# Only consider BTI supported if -mbranch-protection=bti is
# on by default in the compiler and the linker produces
# binaries with GNU property notes in PT_GNU_PROPERTY segment.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for BTI support" >&5
printf %s "checking for BTI support... " >&6; }
if test ${libc_cv_aarch64_bti+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e)   cat > conftest.c <<EOF
void foo (void) { }
EOF
  libc_cv_aarch64_bti=no
  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.c'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='$READELF -lW conftest.so | grep -q GNU_PROPERTY'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='$READELF -nW conftest.so | grep -q "NT_GNU_PROPERTY_TYPE_0.*AArch64 feature:.* BTI"'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }
  then
    libc_cv_aarch64_bti=yes
  fi
  rm -rf conftest.* ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_bti" >&5
printf "%s\n" "$libc_cv_aarch64_bti" >&6; }
config_vars="$config_vars
aarch64-bti = $libc_cv_aarch64_bti"
if test $libc_cv_aarch64_bti = yes; then
  printf "%s\n" "#define HAVE_AARCH64_BTI 1" >>confdefs.h

fi

# Check if glibc is built with return address signing, i.e.
# if -mbranch-protection=pac-ret is on. We need this because
# pac-ret relies on unwinder support so it's not safe to use
# it in assembly code unconditionally, but there is no
# feature test macro for it in gcc.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if pac-ret is enabled" >&5
printf %s "checking if pac-ret is enabled... " >&6; }
if test ${libc_cv_aarch64_pac_ret+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e)   cat > conftest.c <<EOF
int bar (void);
int foo (void) { return bar () + 1; }
EOF
  libc_cv_aarch64_pac_ret=no
  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S -o conftest.s conftest.c'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='grep -q -E '\''(hint( |	)+25|paciasp)'\'' conftest.s'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }
  then
    libc_cv_aarch64_pac_ret=yes
  fi
  rm -rf conftest.* ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_pac_ret" >&5
printf "%s\n" "$libc_cv_aarch64_pac_ret" >&6; }
if test $libc_cv_aarch64_pac_ret = yes; then
  printf "%s\n" "#define HAVE_AARCH64_PAC_RET 1" >>confdefs.h

fi

# Check if binutils supports variant PCS symbols.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for variant PCS support" >&5
printf %s "checking for variant PCS support... " >&6; }
if test ${libc_cv_aarch64_variant_pcs+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e)   cat > conftest.S <<EOF
.global foo
.type foo, %function
.variant_pcs foo
foo:
	ret
.global bar
.type bar, %function
bar:
	b foo
EOF
  libc_cv_aarch64_variant_pcs=no
  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.S'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; } \
     && { ac_try='$READELF -dW conftest.so | grep -q AARCH64_VARIANT_PCS'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }
  then
    libc_cv_aarch64_variant_pcs=yes
  fi
  rm -rf conftest.* ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_variant_pcs" >&5
printf "%s\n" "$libc_cv_aarch64_variant_pcs" >&6; }
config_vars="$config_vars
aarch64-variant-pcs = $libc_cv_aarch64_variant_pcs"

# Check if asm support armv8.2-a+sve
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for SVE support in assembler" >&5
printf %s "checking for SVE support in assembler... " >&6; }
if test ${libc_cv_aarch64_sve_asm+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e) cat > conftest.s <<\EOF
	.arch armv8.2-a+sve
	ptrue p0.b
EOF
if { ac_try='${CC-cc} -c conftest.s 1>&5'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }; then
  libc_cv_aarch64_sve_asm=yes
else
  libc_cv_aarch64_sve_asm=no
fi
rm -f conftest* ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_sve_asm" >&5
printf "%s\n" "$libc_cv_aarch64_sve_asm" >&6; }
if test $libc_cv_aarch64_sve_asm = yes; then
  printf "%s\n" "#define HAVE_AARCH64_SVE_ASM 1" >>confdefs.h

fi

if test x"$build_mathvec" = xnotset; then
  build_mathvec=yes
fi

# Check if compiler supports SVE ACLE.
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for availability of SVE ACLE" >&5
printf %s "checking for availability of SVE ACLE... " >&6; }
if test ${libc_cv_aarch64_sve_acle+y}
then :
  printf %s "(cached) " >&6
else case e in #(
  e)   cat > conftest.c <<EOF
#include <arm_sve.h>
EOF
  if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fsyntax-only -ffreestanding conftest.c'
  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  (eval $ac_try) 2>&5
  ac_status=$?
  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  test $ac_status = 0; }; }; then
    libc_cv_aarch64_sve_acle=yes
  else
    libc_cv_aarch64_sve_acle=no
  fi
  rm conftest.c ;;
esac
fi
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_sve_acle" >&5
printf "%s\n" "$libc_cv_aarch64_sve_acle" >&6; }

# Check if compiler is sufficient to build mathvec
if test $build_mathvec = yes; then
  fail=no
  if test $libc_cv_aarch64_variant_pcs = no; then
    fail=yes
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but linker does not support variant PCS." >&5
printf "%s\n" "$as_me: WARNING: mathvec is enabled but linker does not support variant PCS." >&2;}
  fi
  if test $libc_cv_aarch64_sve_asm = no; then
    fail=yes
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but assembler does not support SVE." >&5
printf "%s\n" "$as_me: WARNING: mathvec is enabled but assembler does not support SVE." >&2;}
  fi
  if test $libc_cv_aarch64_sve_acle = no; then
    fail=yes
    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but compiler does not have SVE ACLE." >&5
printf "%s\n" "$as_me: WARNING: mathvec is enabled but compiler does not have SVE ACLE." >&2;}
  fi
  if test $fail = yes; then
    as_fn_error $? "use a compatible toolchain or configure with --disable-mathvec (this results in incomplete ABI)." "$LINENO" 5
  fi
else
  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is disabled, this results in incomplete ABI." >&5
printf "%s\n" "$as_me: WARNING: mathvec is disabled, this results in incomplete ABI." >&2;}
fi