@@ -13,10 +13,9 @@ AC_DEFUN([gt_BITFIELD_TYPE_MATTERS],
AC_CACHE_CHECK([if the type of bitfields matters], gt_cv_bitfield_type_matters,
[
AC_TRY_COMPILE(
- [struct foo1 { char x; char :0; char y; };
-struct foo2 { char x; int :0; char y; };
-int foo1test[ sizeof (struct foo1) == 2 ? 1 : -1 ];
-int foo2test[ sizeof (struct foo2) == 5 ? 1 : -1]; ],
+ [struct foo1 { char x; char y:1; char z; };
+struct foo2 { char x; long long int y:1; char z; };
+int foo1test[ sizeof (struct foo1) < sizeof (struct foo2) ? 1 : -1 ]; ],
[], gt_cv_bitfield_type_matters=yes, gt_cv_bitfield_type_matters=no)
])
if test $gt_cv_bitfield_type_matters = yes; then
@@ -11539,10 +11539,9 @@ else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
-struct foo1 { char x; char :0; char y; };
-struct foo2 { char x; int :0; char y; };
-int foo1test[ sizeof (struct foo1) == 2 ? 1 : -1 ];
-int foo2test[ sizeof (struct foo2) == 5 ? 1 : -1];
+struct foo1 { char x; char y:1; char z; };
+struct foo2 { char x; long long int y:1; char z; };
+int foo1test[ sizeof (struct foo1) < sizeof (struct foo2) ? 1 : -1 ];
int
main ()
{
From: Trevor Saunders <tbsaunde+gcc@tbsaunde.org> Hi, here's what I committed. bootstrapped + regtested x86_64-linux-gnu. Trev Using a named bitfield with a width more than 0 means we won't hit weirdness caused by the bitfield not really needing to exist. Changing int to long long means we won't have trouble with some arch where size of int is 1 or 2. libobjc/ChangeLog: 2015-05-04 Trevor Saunders <tbsaunde+gcc@tbsaunde.org> * configure: Regenerate. config/ChangeLog: 2015-05-04 Trevor Saunders <tbsaunde+gcc@tbsaunde.org> * bitfields.m4: Change int to long long, and use bitfields of width 1 instead of 0. --- config/bitfields.m4 | 7 +++---- libobjc/configure | 7 +++---- 2 files changed, 6 insertions(+), 8 deletions(-)