mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 22:30:12 +00:00
3b5ebe85aa
This patch removes the arch-specific atomic instruction, relying on compiler builtins. The __sparc32_atomic_locks support is removed and a configure check is added to check if compiler uses libatomic to implement CAS. It also removes the sparc specific sem_* and pthread_barrier_* implementations. It in turn allows buidling against a LEON3/LEON4 sparcv8 target, although it will still be incompatible with generic sparcv9. Checked on sparcv9-linux-gnu and sparc64-linux-gnu. I also checked with build against sparcv8-linux-gnu with -mcpu=leon3. Tested-by: Andreas Larsson <andreas@gaisler.com>
198 lines
6.4 KiB
Plaintext
198 lines
6.4 KiB
Plaintext
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
|
|
# Local configure fragment for sysdeps/sparc/sparc32
|
|
|
|
# Test if compiler targets at least sparcv8.
|
|
|
|
|
|
{ $as_echo "$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 for at least sparcv8 support" >&5
|
|
$as_echo_n "checking for at least sparcv8 support... " >&6; }
|
|
if ${libc_cv_sparcv8+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
|
|
/* end confdefs.h. */
|
|
#if defined (__sparc_v8__) || defined (__sparc_v9__)
|
|
yes
|
|
#endif
|
|
|
|
_ACEOF
|
|
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
|
|
$EGREP "yes" >/dev/null 2>&1; then :
|
|
libc_cv_sparcv8=yes
|
|
else
|
|
libc_cv_sparcv8=no
|
|
fi
|
|
rm -f conftest*
|
|
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_sparcv8" >&5
|
|
$as_echo "$libc_cv_sparcv8" >&6; }
|
|
if test $libc_cv_sparcv8 = no; then
|
|
as_fn_error $? "no support for pre-v8 sparc" "$LINENO" 5
|
|
fi
|
|
|
|
# Test if compiler generates external calls to libatomic for CAS operation.
|
|
# It is suffice to check for int only and the test is similar of C11
|
|
# atomic_compare_exchange_strong using GCC builtins.
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for external libatomic calls" >&5
|
|
$as_echo_n "checking for external libatomic calls... " >&6; }
|
|
if ${libc_cv_cas_uses_libatomic+:} false; then :
|
|
$as_echo_n "(cached) " >&6
|
|
else
|
|
cat > conftest.c <<EOF
|
|
_Bool foo (int *ptr, int *expected, int desired)
|
|
{
|
|
return __atomic_compare_exchange_n (ptr, expected, desired, 0,
|
|
__ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
|
|
}
|
|
EOF
|
|
libc_cv_cas_uses_libatomic=no
|
|
if { ac_try='${CC-cc} -S conftest.c -o conftest.s 1>&5'
|
|
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
|
|
(eval $ac_try) 2>&5
|
|
ac_status=$?
|
|
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
|
|
test $ac_status = 0; }; }; then
|
|
if grep '__atomic_compare_exchange_4' conftest.s >/dev/null; then
|
|
libc_cv_cas_uses_libatomic=yes
|
|
fi
|
|
fi
|
|
rm -f conftest.c conftest.s
|
|
|
|
fi
|
|
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cas_uses_libatomic" >&5
|
|
$as_echo "$libc_cv_cas_uses_libatomic" >&6; }
|
|
if test $libc_cv_cas_uses_libatomic = yes; then
|
|
as_fn_error $? "external dependency of libatomic is not supported" "$LINENO" 5
|
|
fi
|