http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52981
Bug #: 52981
Summary: Separate -Wpacked into two options
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: akurl...@digi.com
The option -Wpacked reports two different warnings:
1. warning: padding struct to align ‘<member name>’
2. warning: padding struct size to alignment boundary
The first warning indicates that the structure can be reordered in such a way
as to reduce padding. The second warning simply indicates that the structure is
not a multiple of the largest primitive data type and required padding at the
end.
I find the first warning much more interesting than the second one.
Specifically I would like to control them individually using -Werror.
If we can add something like -Wpacked-align and -Wpacked-size as additional
options (while still preserving the behavior of -Wpacked) I think this would be
a valuable addition to GCC.
