Request for size_tmix (ld)

[GoogleCodeExporter]

Would it be possible to implement size_tmix option for the ld?
Description(from COFF):
" The contents of f_flags3 are as follows. The most left bit is numbered
zero in the following explanation.

      Bit 0:    size_tmix mode identification information

      0 :   Not the following condition.
      1 :   Not depending on the size of size_t type."

This would help to provide only one set or less sets of IOFWD libs.

Original issue reported on code.google.com by danny.st...@gmail.com on 11 Nov 2009 at 2:25

[GoogleCodeExporter]

One remark. We just need this for the partial linking step. So may be the flag 
in the
file header must be set only. At the end we link with SX native linker which 
will
look for it. The source files also compiled with SX native.

Original comment by danny.st...@gmail.com on 11 Nov 2009 at 2:29

[GoogleCodeExporter]

hmmmm ... can do, but ...

does this imply that no symbol in the object file uses size_t? (that is how I
understand "not depending on size of size_t type") or what exactly is the 
meaning of
the flag?

Original comment by jmoc...@gmail.com on 11 Nov 2009 at 5:42

• Changed state: Accepted

[GoogleCodeExporter]

No, it means that the size_t('s) in this object are compatible to both, to 
size_t32
and to size_t64. You should find it in the SX ld source code how to handle it. I
don't know how it is implemented.

Original comment by danny.st...@gmail.com on 12 Nov 2009 at 10:08

[GoogleCodeExporter]

hmmm ... ok, will take a look ...

Original comment by jmoc...@gmail.com on 12 Nov 2009 at 10:22

[GoogleCodeExporter]

size_tmix option is implemented in r216. svn up, pls.

use it by passing --sx-option=size_tmix to ld (or, equivalently,
-Wl,--sx-option=size_tmix to gcc if that one is used to invoke the linker).

do report if it works properly ... ;)

Original comment by jmoc...@gmail.com on 12 Nov 2009 at 11:27

• Changed state: Fixed

[GoogleCodeExporter]

So basically it seems to work. At least it does the same as SX native link does.
However I have a problem to use that feature as intended with both linkers. 
I'll come
up later again if I found it out.

Original comment by danny.st...@gmail.com on 13 Nov 2009 at 7:52

[GoogleCodeExporter]

As understood the size_tmix is used to mark objects to compatible to both, 
size_t32
and size_t64, because they do not include this data type. So it is harmless to 
link a
size_tmix object to size_32/64 executable. At final linking step compatibility 
is not
checked for this mixed object even if size_t is included.

Unfortunately this doesn't bring any benefit to us. ;-( However this option is
implemented correctly in SX GNU ld now. Thanks again!

Original comment by danny.st...@gmail.com on 16 Nov 2009 at 11:07