diff options
| author | tbsaunde <tbsaunde@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-05-05 03:41:53 +0000 |
|---|---|---|
| committer | tbsaunde <tbsaunde@138bc75d-0d04-0410-961f-82ee72b054a4> | 2015-05-05 03:41:53 +0000 |
| commit | 690b050a17c1d61a257c046959b6b4dbe123e9bb (patch) | |
| tree | ccc4d5e0cfe5965a5e89e5eb7f6616cfdb85f63e /config | |
| parent | edfc04e760da62abe4974546679abbfd5c02a9c8 (diff) | |
| download | gcc-690b050a17c1d61a257c046959b6b4dbe123e9bb.tar.gz | |
Improve the test in bitfields.m4
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.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222794 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'config')
| -rw-r--r-- | config/ChangeLog | 5 | ||||
| -rw-r--r-- | config/bitfields.m4 | 7 |
2 files changed, 8 insertions, 4 deletions
diff --git a/config/ChangeLog b/config/ChangeLog index 19f2103a3c0..d62ae4ce6c8 100644 --- a/config/ChangeLog +++ b/config/ChangeLog @@ -1,3 +1,8 @@ +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. + 2015-05-01 Trevor Saunders <tbsaunde+gcc@tbsaunde.org> * bitfields.m4: New file. diff --git a/config/bitfields.m4 b/config/bitfields.m4 index ee8f3b5baba..8185cd302a9 100644 --- a/config/bitfields.m4 +++ b/config/bitfields.m4 @@ -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 |