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Bug 5439 – 64bit struct alignment inconsistent with C ABI

Status: RESOLVED
Resolution: FIXED
Severity: normal
Priority: P2
Component: dmd
Product: D
Version: D2
Platform: x86_64
OS: Linux
Creation time: 2011-01-09T11:03:00Z
Last change time: 2015-06-09T05:12:03Z
Assigned to: nobody
Creator: ibuclaw

Comments

Comment #0 by ibuclaw — 2011-01-09T11:03:22Z

This was caused by bug2821. On 64bit, doubles are 8-byte aligned, not 4, so struct { long, short } Should have a sizeof = 16, not 12. Btw, would be nice if you offered a -malign-double type flag to say "Yes, I want 8 byte aligned doubles on 32bit Linux" :) Regards

Comment #1 by ibuclaw — 2011-01-09T11:05:08Z

To save you searching for it, lookup "TypeBasic::alignsize"

Comment #2 by bugzilla — 2011-01-11T00:05:55Z

http://www.dsource.org/projects/dmd/changeset/861