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No need for test for __builtin_expect

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This commit is contained in:
Ulrich Drepper 2012-01-08 09:21:09 -05:00
parent 5c8e36b478
commit 3857022a76
3 changed files with 1 additions and 54 deletions
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1
ChangeLog
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@ -4,6 +4,7 @@
No need to check for signed size_t anymore.
Don't set libc_commonpagesize and libc_relro_required here for Alpha
and IA-64.
Remove __builtin_expect test because we require at least gcc 3.4.
* aclocal.m4: Likewise.

32
configure vendored
View File

@ -6962,38 +6962,6 @@ if test "$libc_cv_c_asmcr0_bug" != 'no'; then
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_expect" >&5
$as_echo_n "checking for __builtin_expect... " >&6; }
if ${libc_cv_gcc_builtin_expect+:} false; then :
$as_echo_n "(cached) " >&6
else
cat > conftest.c <<EOF
#line $LINENO "configure"
int foo (int a)
{
a = __builtin_expect (a, 10);
return a == 10 ? 0 : 1;
}
EOF
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&5'
{ { eval echo "\"\$as_me\":${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
libc_cv_gcc_builtin_expect=yes
else
libc_cv_gcc_builtin_expect=no
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_gcc_builtin_expect" >&5
$as_echo "$libc_cv_gcc_builtin_expect" >&6; }
if test "$libc_cv_gcc_builtin_expect" = no; then
as_fn_error $? "support for __builtin_expect needed" "$LINENO" 5
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __builtin_memset" >&5
$as_echo_n "checking for __builtin_memset... " >&6; }
if ${libc_cv_gcc_builtin_memset+:} false; then :

22
configure.in
View File

@ -1964,28 +1964,6 @@ if test "$libc_cv_c_asmcr0_bug" != 'no'; then
fi
fi
dnl Check whether compiler understands __builtin_expect.
AC_CACHE_CHECK(for __builtin_expect, libc_cv_gcc_builtin_expect,
[cat > conftest.c <<EOF
#line $LINENO "configure"
int foo (int a)
{
a = __builtin_expect (a, 10);
return a == 10 ? 0 : 1;
}
EOF
dnl No \ in command here because it ends up inside ''.
if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AS_MESSAGE_LOG_FD]); then
libc_cv_gcc_builtin_expect=yes
else
libc_cv_gcc_builtin_expect=no
fi
rm -f conftest*])
if test "$libc_cv_gcc_builtin_expect" = no; then
AC_MSG_ERROR([support for __builtin_expect needed])
fi
AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl
cat > conftest.c <<\EOF
void zero (void *x)