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-rwxr-xr-xlibstdc++-v3/configure420
1 files changed, 133 insertions, 287 deletions
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 819a1d82..3fd03b8 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -15989,7 +15989,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
old_CXXFLAGS="$CXXFLAGS"
- # Do link tests if possible, instead asm tests, limited to some platforms
+ # Do link tests if possible, otherwise asm tests. Limited to some platforms
# see discussion in PR target/40134, PR libstdc++/40133 and the thread
# starting at http://gcc.gnu.org/ml/gcc-patches/2009-07/msg00322.html
atomic_builtins_link_tests=no
@@ -16002,326 +16002,77 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
esac
fi
- if test x$atomic_builtins_link_tests = xyes; then
+ if test "$atomic_builtins_link_tests" = yes; then
- # Do link tests.
+ # Do link tests.
- CXXFLAGS="$CXXFLAGS -fno-exceptions"
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for bool" >&5
-$as_echo_n "checking for atomic builtins for bool... " >&6; }
-if ${glibcxx_cv_atomic_bool+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_bool=yes
-else
- glibcxx_cv_atomic_bool=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_bool" >&5
-$as_echo "$glibcxx_cv_atomic_bool" >&6; }
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for short" >&5
-$as_echo_n "checking for atomic builtins for short... " >&6; }
-if ${glibcxx_cv_atomic_short+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_short=yes
-else
- glibcxx_cv_atomic_short=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_short" >&5
-$as_echo "$glibcxx_cv_atomic_short" >&6; }
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for int" >&5
-$as_echo_n "checking for atomic builtins for int... " >&6; }
-if ${glibcxx_cv_atomic_int+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
- if test x$gcc_no_link = xyes; then
- as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
-fi
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
-int
-main ()
-{
-typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_int=yes
-else
- glibcxx_cv_atomic_int=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_int" >&5
-$as_echo "$glibcxx_cv_atomic_int" >&6; }
+ CXXFLAGS="$CXXFLAGS -fno-exceptions"
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for long long" >&5
-$as_echo_n "checking for atomic builtins for long long... " >&6; }
-if ${glibcxx_cv_atomic_long_long+:} false; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for _Atomic_word" >&5
+$as_echo_n "checking for atomic builtins for _Atomic_word... " >&6; }
+if ${glibcxx_cv_atomic_word+:} false; then :
$as_echo_n "(cached) " >&6
else
-
- if test x$gcc_no_link = xyes; then
+ if test x$gcc_no_link = xyes; then
as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
fi
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-
+#include "${glibcxx_srcdir}/config/$atomic_word_dir/atomic_word.h"
int
main ()
{
-typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
+_Atomic_word a = 0, b;
+ b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);
;
return 0;
}
_ACEOF
if ac_fn_cxx_try_link "$LINENO"; then :
- glibcxx_cv_atomic_long_long=yes
+ glibcxx_cv_atomic_word=yes
else
- glibcxx_cv_atomic_long_long=no
+ glibcxx_cv_atomic_word=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
-
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_long_long" >&5
-$as_echo "$glibcxx_cv_atomic_long_long" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_word" >&5
+$as_echo "$glibcxx_cv_atomic_word" >&6; }
else
+ # Do asm tests.
- # Do asm tests.
-
- # Compile unoptimized.
- CXXFLAGS='-O0 -S'
-
- # Fake what AC_TRY_COMPILE does.
-
- cat > conftest.$ac_ext << EOF
-#line 16185 "configure"
-int main()
-{
- typedef bool atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- // N.B. __atomic_fetch_add is not supported for bool.
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for bool" >&5
-$as_echo_n "checking for atomic builtins for bool... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_bool=no
- else
- glibcxx_cv_atomic_bool=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_bool" >&5
-$as_echo "$glibcxx_cv_atomic_bool" >&6; }
- rm -f conftest*
-
- cat > conftest.$ac_ext << EOF
-#line 16220 "configure"
-int main()
-{
- typedef short atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
-
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for short" >&5
-$as_echo_n "checking for atomic builtins for short... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_short=no
- else
- glibcxx_cv_atomic_short=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_short" >&5
-$as_echo "$glibcxx_cv_atomic_short" >&6; }
- rm -f conftest*
-
- cat > conftest.$ac_ext << EOF
-#line 16255 "configure"
-int main()
-{
- // NB: _Atomic_word not necessarily int.
- typedef int atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
-}
-EOF
+ # Compile unoptimized.
+ CXXFLAGS='-O0 -S'
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for int" >&5
-$as_echo_n "checking for atomic builtins for int... " >&6; }
- if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
- (eval $ac_compile) 2>&5
- ac_status=$?
- $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
- test $ac_status = 0; }; then
- if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_int=no
- else
- glibcxx_cv_atomic_int=yes
- fi
- fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_int" >&5
-$as_echo "$glibcxx_cv_atomic_int" >&6; }
- rm -f conftest*
+ # Fake what AC_TRY_COMPILE does.
cat > conftest.$ac_ext << EOF
-#line 16291 "configure"
+#line 16051 "configure"
+#include "${glibcxx_srcdir}/config/$atomic_word_dir/atomic_word.h"
int main()
{
- typedef long long atomic_type;
- atomic_type c1;
- atomic_type c2;
- atomic_type c3(0);
- __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
- __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
- __ATOMIC_RELAXED);
- __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
- __atomic_load_n(&c1, __ATOMIC_RELAXED);
-
- return 0;
+ _Atomic_word a = 0, b;
+ b = __atomic_fetch_add(&a, 1, __ATOMIC_ACQ_REL);
}
EOF
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for long long" >&5
-$as_echo_n "checking for atomic builtins for long long... " >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for _Atomic_word" >&5
+$as_echo_n "checking for atomic builtins for _Atomic_word... " >&6; }
if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
(eval $ac_compile) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; then
if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
- glibcxx_cv_atomic_long_long=no
+ glibcxx_cv_atomic_word=no
else
- glibcxx_cv_atomic_long_long=yes
+ glibcxx_cv_atomic_word=yes
fi
fi
- { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_long_long" >&5
-$as_echo "$glibcxx_cv_atomic_long_long" >&6; }
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_atomic_word" >&5
+$as_echo "$glibcxx_cv_atomic_word" >&6; }
rm -f conftest*
-
fi
CXXFLAGS="$old_CXXFLAGS"
@@ -16332,14 +16083,12 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
ac_compiler_gnu=$ac_cv_c_compiler_gnu
- # Set atomicity_dir to builtins if all but the long long test above passes,
+ # Set atomicity_dir to builtins if the test above passes,
# or if the builtins were already chosen (e.g. by configure.host).
- if { test "$glibcxx_cv_atomic_bool" = yes \
- && test "$glibcxx_cv_atomic_short" = yes \
- && test "$glibcxx_cv_atomic_int" = yes; } \
+ if test "$glibcxx_cv_atomic_word" = yes \
|| test "$atomicity_dir" = "cpu/generic/atomicity_builtins"; then
-$as_echo "#define _GLIBCXX_ATOMIC_BUILTINS 1" >>confdefs.h
+$as_echo "#define _GLIBCXX_ATOMIC_WORD_BUILTINS 1" >>confdefs.h
atomicity_dir=cpu/generic/atomicity_builtins
fi
@@ -16445,7 +16194,7 @@ $as_echo "mutex" >&6; }
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16448 "configure"
+#line 16197 "configure"
int main()
{
_Decimal32 d1;
@@ -16487,7 +16236,7 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
# unnecessary for this test.
cat > conftest.$ac_ext << EOF
-#line 16490 "configure"
+#line 16239 "configure"
template<typename T1, typename T2>
struct same
{ typedef T2 type; };
@@ -53788,8 +53537,105 @@ fi
BACKTRACE_CPPFLAGS="-D_GNU_SOURCE"
- # libbacktrace only needs atomics for int, which we've already tested
- if test "$glibcxx_cv_atomic_int" = "yes"; then
+ GLIBCXX_LANG_PUSH
+
+ # libbacktrace's own configure.ac only tests atomics for int,
+ # but the code actually uses atomics for size_t and pointers as well.
+ if test "$atomic_builtins_link_tests" = yes; then
+
+ CXXFLAGS='-O0'
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for libbacktrace" >&5
+$as_echo_n "checking for atomic builtins for libbacktrace... " >&6; }
+if ${glibcxx_cv_libbacktrace_atomics+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test x$gcc_no_link = xyes; then
+ as_fn_error $? "Link tests are not allowed after GCC_NO_EXECUTABLES." "$LINENO" 5
+fi
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+int
+main ()
+{
+
+ int i = 0;
+ int* p = &i;
+ size_t s = 0;
+ // backtrace_atomic_load_pointer
+ void* vp = __atomic_load_n(&p, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_load_int
+ int i2 = __atomic_load_n(&i, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_store_pointer
+ __atomic_store_n(&p, &i, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_size_t
+ __atomic_store_n(&s, s, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_int
+ __atomic_store_n(&i, i, __ATOMIC_RELEASE);
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ glibcxx_cv_libbacktrace_atomics=yes
+else
+ glibcxx_cv_libbacktrace_atomics=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_libbacktrace_atomics" >&5
+$as_echo "$glibcxx_cv_libbacktrace_atomics" >&6; }
+
+ else
+ # Do asm tests.
+
+ CXXFLAGS='-O0 -S'
+
+ cat > conftest.$ac_ext << EOF
+#line 53598 "configure"
+#include <stddef.h>
+int main()
+{
+ int i = 0;
+ int* p = &i;
+ size_t s = 0;
+ // backtrace_atomic_load_pointer
+ void* vp = __atomic_load_n(&p, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_load_int
+ int i2 = __atomic_load_n(&i, __ATOMIC_ACQUIRE);
+ // backtrace_atomic_store_pointer
+ __atomic_store_n(&p, &i, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_size_t
+ __atomic_store_n(&s, s, __ATOMIC_RELEASE);
+ // backtrace_atomic_store_int
+ __atomic_store_n(&i, i, __ATOMIC_RELEASE);
+}
+EOF
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for atomic builtins for libbacktrace" >&5
+$as_echo_n "checking for atomic builtins for libbacktrace... " >&6; }
+ if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
+ (eval $ac_compile) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; then
+ if grep __atomic_ conftest.s >/dev/null 2>&1 ; then
+ glibcxx_cv_libbacktrace_atomics=no
+ else
+ glibcxx_cv_libbacktrace_atomics=yes
+ fi
+ fi
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $glibcxx_cv_libbacktrace_atomics" >&5
+$as_echo "$glibcxx_cv_libbacktrace_atomics" >&6; }
+ rm -f conftest*
+ fi
+
+ GLIBCXX_LANG_POP
+
+ if test "$glibcxx_cv_libbacktrace_atomics" = yes; then
BACKTRACE_CPPFLAGS="$BACKTRACE_CPPFLAGS -DHAVE_ATOMIC_FUNCTIONS=1"
fi
generated by cgit v1.1 at 2025-05-07 14:02:06 +0000