------- Comment #1 from ebotcazou at gcc dot gnu dot org 2005-11-14 20:37
-------
> Joel confirmed that changing "Min (2" to "Min (4" enable this file to be
> compiled, however my reading of the source would imply that BIGGEST_ALIGNMENT
> is at least 32 on arm, so something else must be at play here, any idea?
Excerpt from config/arm/arm.h:
/* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the
value set in previous versions of this toolchain was 8, which produces more
compact structures. The command line option -mstructure_size_boundary=<n>
can be used to change this value. For compatibility with the ARM SDK
however the value should be left at 32. ARM SDT Reference Manual (ARM DUI
0020D) page 2-20 says "Structures are aligned on word boundaries".
The AAPCS specifies a value of 8. */
#define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
extern int arm_structure_size_boundary;
/* This is the value used to initialize arm_structure_size_boundary. If a
particular arm target wants to change the default value it should change
the definition of this macro, not STRUCTURE_SIZE_BOUNDARY. See netbsd.h
for an example of this. */
#ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY
#define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32
#endif
--
ebotcazou at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24857
