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alpha: Adjust the libc_cv_alpha_hidden_gprel test for gcc 4.5.

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GCC 4.5 was able to tell that BAR was read-only and zero, and
elided the load.  Which caused the pattern match to fail.

Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2010-03-26 10:27:37 -07:00
parent 6796df65e4
commit a9374d8174
3 changed files with 22 additions and 24 deletions
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6
ChangeLog.alpha
View File

@ -1,3 +1,9 @@
2010-03-26 Richard Henderson <rth@redhat.com>
* sysdep/alpha/elf/configure.in (libc_cv_alpha_hidden_gprel)
Adjust the test for gcc 4.5.
* sysdep/alpha/elf/configure: Rebuild.
2010-03-26 Richard Henderson <rth@redhat.com>
* sysdeps/alpha/bits/atomic.h (__arch_exchange_8_int,

32
sysdeps/alpha/elf/configure vendored
View File

@ -4,10 +4,10 @@
if test "$usetls" != no; then
# Check for support of thread-local storage handling in assembler and
# linker.
echo "$as_me:$LINENO: checking for Alpha TLS support" >&5
echo $ECHO_N "checking for Alpha TLS support... $ECHO_C" >&6
{ $as_echo "$as_me:$LINENO: checking for Alpha TLS support" >&5
$as_echo_n "checking for Alpha TLS support... " >&6; }
if test "${libc_cv_alpha_tls+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
$as_echo_n "(cached) " >&6
else
cat > conftest.s <<\EOF
.section ".tdata", "awT", @progbits
@ -47,7 +47,7 @@ if { ac_try='${CC-cc} -c $CFLAGS conftest.s 1>&5'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
libc_cv_alpha_tls=yes
else
@ -55,8 +55,8 @@ else
fi
rm -f conftest*
fi
echo "$as_me:$LINENO: result: $libc_cv_alpha_tls" >&5
echo "${ECHO_T}$libc_cv_alpha_tls" >&6
{ $as_echo "$as_me:$LINENO: result: $libc_cv_alpha_tls" >&5
$as_echo "$libc_cv_alpha_tls" >&6; }
if test $libc_cv_alpha_tls = yes; then
cat >>confdefs.h <<\_ACEOF
#define HAVE_TLS_SUPPORT 1
@ -65,19 +65,15 @@ _ACEOF
fi
fi
echo "$as_me:$LINENO: checking for GP relative module local relocs" >&5
echo $ECHO_N "checking for GP relative module local relocs... $ECHO_C" >&6
{ $as_echo "$as_me:$LINENO: checking for GP relative module local relocs" >&5
$as_echo_n "checking for GP relative module local relocs... " >&6; }
if test "${libc_cv_alpha_hidden_gprel+set}" = set; then
echo $ECHO_N "(cached) $ECHO_C" >&6
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<\EOF
static int bar;
static volatile int bar;
int baz __attribute__((visibility("hidden")));
int foo (void)
{
return bar + baz;
}
int f(void) { return bar + baz; }
EOF
libc_cv_alpha_hidden_gprel=no
@ -85,7 +81,7 @@ if { ac_try='${CC-cc} -S $CFLAGS -O2 -fpic conftest.c 1>&5'
{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
(eval $ac_try) 2>&5
ac_status=$?
echo "$as_me:$LINENO: \$? = $ac_status" >&5
$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
(exit $ac_status); }; }; then
if grep -q 'bar.*!gprel' conftest.s \
&& grep -q 'baz.*!gprel' conftest.s \
@ -96,8 +92,8 @@ if { ac_try='${CC-cc} -S $CFLAGS -O2 -fpic conftest.c 1>&5'
fi
rm -f conftest*
fi
echo "$as_me:$LINENO: result: $libc_cv_alpha_hidden_gprel" >&5
echo "${ECHO_T}$libc_cv_alpha_hidden_gprel" >&6
{ $as_echo "$as_me:$LINENO: result: $libc_cv_alpha_hidden_gprel" >&5
$as_echo "$libc_cv_alpha_hidden_gprel" >&6; }
if test $libc_cv_alpha_hidden_gprel = yes; then
cat >>confdefs.h <<\_ACEOF
#define PI_STATIC_AND_HIDDEN 1

8
sysdeps/alpha/elf/configure.in
View File

@ -53,13 +53,9 @@ fi
AC_CACHE_CHECK(for GP relative module local relocs, libc_cv_alpha_hidden_gprel, [dnl
cat > conftest.c <<\EOF
static int bar;
static volatile int bar;
int baz __attribute__((visibility("hidden")));
int foo (void)
{
return bar + baz;
}
int f(void) { return bar + baz; }
EOF
dnl