mirror of
https://sourceware.org/git/glibc.git
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642f1b9b3d
Check assembler and linker support too, not just SVE ACLE in the compiler, since variant PCS requires at least binutils 2.32.1.
384 lines
13 KiB
Plaintext
384 lines
13 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
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# Local configure fragment for sysdeps/aarch64.
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# Static PIE is supported.
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$as_echo "#define SUPPORT_STATIC_PIE 1" >>confdefs.h
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# We check to see if the compiler and flags are
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# selecting the big endian ABI and if they are then
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# we set libc_cv_aarch64_be to yes which causes
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# HAVE_AARCH64_BE to be defined in config.h and
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# in include/libc-symbols.h and thus available to
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# shlib-versions to select the appropriate name for
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# the dynamic linker via %ifdef.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
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$as_echo_n "checking for grep that handles long lines and -e... " >&6; }
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if ${ac_cv_path_GREP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test -z "$GREP"; then
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ac_path_GREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_prog in grep ggrep; do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
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as_fn_executable_p "$ac_path_GREP" || continue
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# Check for GNU ac_path_GREP and select it if it is found.
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# Check for GNU $ac_path_GREP
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case `"$ac_path_GREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
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*)
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ac_count=0
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$as_echo_n 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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$as_echo 'GREP' >> "conftest.nl"
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"$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_GREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_GREP="$ac_path_GREP"
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ac_path_GREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_GREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_GREP"; then
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as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_GREP=$GREP
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
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$as_echo "$ac_cv_path_GREP" >&6; }
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GREP="$ac_cv_path_GREP"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
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$as_echo_n "checking for egrep... " >&6; }
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if ${ac_cv_path_EGREP+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
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then ac_cv_path_EGREP="$GREP -E"
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else
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if test -z "$EGREP"; then
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ac_path_EGREP_found=false
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# Loop through the user's path and test for each of PROGNAME-LIST
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_prog in egrep; do
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for ac_exec_ext in '' $ac_executable_extensions; do
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ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
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as_fn_executable_p "$ac_path_EGREP" || continue
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# Check for GNU ac_path_EGREP and select it if it is found.
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# Check for GNU $ac_path_EGREP
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case `"$ac_path_EGREP" --version 2>&1` in
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*GNU*)
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ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
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*)
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ac_count=0
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$as_echo_n 0123456789 >"conftest.in"
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while :
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do
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cat "conftest.in" "conftest.in" >"conftest.tmp"
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mv "conftest.tmp" "conftest.in"
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cp "conftest.in" "conftest.nl"
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$as_echo 'EGREP' >> "conftest.nl"
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"$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
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diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
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as_fn_arith $ac_count + 1 && ac_count=$as_val
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if test $ac_count -gt ${ac_path_EGREP_max-0}; then
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# Best one so far, save it but keep looking for a better one
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ac_cv_path_EGREP="$ac_path_EGREP"
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ac_path_EGREP_max=$ac_count
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fi
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# 10*(2^10) chars as input seems more than enough
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test $ac_count -gt 10 && break
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done
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rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
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esac
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$ac_path_EGREP_found && break 3
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done
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done
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done
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IFS=$as_save_IFS
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if test -z "$ac_cv_path_EGREP"; then
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as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
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fi
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else
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ac_cv_path_EGREP=$EGREP
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fi
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
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$as_echo "$ac_cv_path_EGREP" >&6; }
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EGREP="$ac_cv_path_EGREP"
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for big endian" >&5
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$as_echo_n "checking for big endian... " >&6; }
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if ${libc_cv_aarch64_be+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#ifdef __AARCH64EB__
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yes
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#endif
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_ACEOF
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if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
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$EGREP "yes" >/dev/null 2>&1; then :
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libc_cv_aarch64_be=yes
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else
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libc_cv_aarch64_be=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_be" >&5
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$as_echo "$libc_cv_aarch64_be" >&6; }
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if test $libc_cv_aarch64_be = yes; then
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$as_echo "#define HAVE_AARCH64_BE 1" >>confdefs.h
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config_vars="$config_vars
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default-abi = lp64_be"
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else
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config_vars="$config_vars
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default-abi = lp64"
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fi
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# Only consider BTI supported if -mbranch-protection=bti is
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# on by default in the compiler and the linker produces
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# binaries with GNU property notes in PT_GNU_PROPERTY segment.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BTI support" >&5
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$as_echo_n "checking for BTI support... " >&6; }
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if ${libc_cv_aarch64_bti+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<EOF
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void foo (void) { }
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EOF
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libc_cv_aarch64_bti=no
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.c'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& { ac_try='$READELF -lW conftest.so | grep -q GNU_PROPERTY'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& { ac_try='$READELF -nW conftest.so | grep -q "NT_GNU_PROPERTY_TYPE_0.*AArch64 feature:.* BTI"'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_cv_aarch64_bti=yes
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fi
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rm -rf conftest.*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_bti" >&5
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$as_echo "$libc_cv_aarch64_bti" >&6; }
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config_vars="$config_vars
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aarch64-bti = $libc_cv_aarch64_bti"
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if test $libc_cv_aarch64_bti = yes; then
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$as_echo "#define HAVE_AARCH64_BTI 1" >>confdefs.h
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fi
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# Check if glibc is built with return address signing, i.e.
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# if -mbranch-protection=pac-ret is on. We need this because
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# pac-ret relies on unwinder support so it's not safe to use
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# it in assembly code unconditionally, but there is no
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# feature test macro for it in gcc.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if pac-ret is enabled" >&5
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$as_echo_n "checking if pac-ret is enabled... " >&6; }
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if ${libc_cv_aarch64_pac_ret+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<EOF
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int bar (void);
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int foo (void) { return bar () + 1; }
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EOF
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libc_cv_aarch64_pac_ret=no
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -S -o conftest.s conftest.c'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& { ac_try='grep -q -E '\''(hint( | )+25|paciasp)'\'' conftest.s'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_cv_aarch64_pac_ret=yes
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fi
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rm -rf conftest.*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_pac_ret" >&5
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$as_echo "$libc_cv_aarch64_pac_ret" >&6; }
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if test $libc_cv_aarch64_pac_ret = yes; then
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$as_echo "#define HAVE_AARCH64_PAC_RET 1" >>confdefs.h
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fi
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# Check if binutils supports variant PCS symbols.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for variant PCS support" >&5
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$as_echo_n "checking for variant PCS support... " >&6; }
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if ${libc_cv_aarch64_variant_pcs+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.S <<EOF
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.global foo
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.type foo, %function
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.variant_pcs foo
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foo:
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ret
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.global bar
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.type bar, %function
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bar:
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b foo
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EOF
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libc_cv_aarch64_variant_pcs=no
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles $no_ssp -shared -fPIC -o conftest.so conftest.S'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; } \
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&& { ac_try='$READELF -dW conftest.so | grep -q AARCH64_VARIANT_PCS'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }
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then
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libc_cv_aarch64_variant_pcs=yes
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fi
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rm -rf conftest.*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_variant_pcs" >&5
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$as_echo "$libc_cv_aarch64_variant_pcs" >&6; }
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config_vars="$config_vars
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aarch64-variant-pcs = $libc_cv_aarch64_variant_pcs"
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# Check if asm support armv8.2-a+sve
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for SVE support in assembler" >&5
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$as_echo_n "checking for SVE support in assembler... " >&6; }
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if ${libc_cv_aarch64_sve_asm+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.s <<\EOF
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ptrue p0.b
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EOF
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if { ac_try='${CC-cc} -c -march=armv8.2-a+sve conftest.s 1>&5'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then
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libc_cv_aarch64_sve_asm=yes
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else
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libc_cv_aarch64_sve_asm=no
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fi
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rm -f conftest*
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_sve_asm" >&5
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$as_echo "$libc_cv_aarch64_sve_asm" >&6; }
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if test $libc_cv_aarch64_sve_asm = yes; then
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$as_echo "#define HAVE_AARCH64_SVE_ASM 1" >>confdefs.h
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fi
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if test x"$build_mathvec" = xnotset; then
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build_mathvec=yes
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fi
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# Check if compiler supports SVE ACLE.
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for availability of SVE ACLE" >&5
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$as_echo_n "checking for availability of SVE ACLE... " >&6; }
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if ${libc_cv_aarch64_sve_acle+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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cat > conftest.c <<EOF
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#include <arm_sve.h>
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EOF
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if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS -fsyntax-only -ffreestanding conftest.c'
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{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
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test $ac_status = 0; }; }; then
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libc_cv_aarch64_sve_acle=yes
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else
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libc_cv_aarch64_sve_acle=no
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fi
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rm conftest.c
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_aarch64_sve_acle" >&5
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$as_echo "$libc_cv_aarch64_sve_acle" >&6; }
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# Check if compiler is sufficient to build mathvec
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if test $build_mathvec = yes; then
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fail=no
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if test $libc_cv_aarch64_variant_pcs = no; then
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fail=yes
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but linker does not support variant PCS." >&5
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$as_echo "$as_me: WARNING: mathvec is enabled but linker does not support variant PCS." >&2;}
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fi
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if test $libc_cv_aarch64_sve_asm = no; then
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fail=yes
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but assembler does not support SVE." >&5
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$as_echo "$as_me: WARNING: mathvec is enabled but assembler does not support SVE." >&2;}
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fi
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if test $libc_cv_aarch64_sve_acle = no; then
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fail=yes
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is enabled but compiler does not have SVE ACLE." >&5
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$as_echo "$as_me: WARNING: mathvec is enabled but compiler does not have SVE ACLE." >&2;}
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fi
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if test $fail = yes; then
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as_fn_error $? "use a compatible toolchain or configure with --disable-mathvec (this results in incomplete ABI)." "$LINENO" 5
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fi
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: mathvec is disabled, this results in incomplete ABI." >&5
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$as_echo "$as_me: WARNING: mathvec is disabled, this results in incomplete ABI." >&2;}
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fi
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