--- Comment #11 from jmichae3 at yahoo dot com 2009-04-03 09:02 ---
I get perfect code with the borland compiler packing switch with C++ code. it
would be nice if gcc could do the same in C++.
I don't necessarily have to have -O3, but I need to be able to pack structs
somehow so I
--- Comment #1 from jmichae3 at yahoo dot com 2009-03-09 06:32 ---
Created an attachment (id=17420)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17420action=view)
-fpack-struct -O3 with iostream .ii file
g++ -v -save-temps -fpack-struct -O3 io.cpp
this is the generated io.ii
--- Comment #2 from jmichae3 at yahoo dot com 2009-03-09 06:41 ---
Created an attachment (id=17421)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17421action=view)
-fpack-struct with iostream .ii file
g++ -v -save-temps -fpack-struct io.cpp
both attachments ( .ii files) are from
--- Comment #3 from jmichae3 at yahoo dot com 2009-03-09 06:45 ---
Created an attachment (id=17422)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17422action=view)
io.cpp, an offending source file
problem is it #includes iostream if -fpack-struct is used. that is all that
is
--- Comment #4 from jmichae3 at yahoo dot com 2009-03-09 06:50 ---
Created an attachment (id=17423)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17423action=view)
source that #includes istream and fails just as miserably with -fpack-struct
C:\prj\test\iostreamdosg++ -v
--- Comment #5 from jmichae3 at yahoo dot com 2009-03-09 06:55 ---
Created an attachment (id=17424)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17424action=view)
source that #includes fstream which also fails miserably with -fpack-struct
new attachment: source for f.cpp
--- Comment #6 from jmichae3 at yahoo dot com 2009-03-09 06:57 ---
Created an attachment (id=17425)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17425action=view)
f.ii for fstream problem
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39404
--- Comment #7 from jmichae3 at yahoo dot com 2009-03-09 06:59 ---
Created an attachment (id=17426)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17426action=view)
i.ii for istream problem
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39404
--- Comment #8 from dannysmith at users dot sourceforge dot net 2009-03-09
07:52 ---
From gcc.info:
*Warning:* the `-fpack-struct' switch causes GCC to generate code
that is not binary compatible with code generated without that
switch. Additionally, it makes the code
--- Comment #9 from rguenth at gcc dot gnu dot org 2009-03-09 15:37 ---
This flag isn't supposed to be used with libstdc++.
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
--- Comment #10 from jmichae3 at yahoo dot com 2009-03-09 20:12 ---
I didn't read that in the documentation.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39404
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