[Bug libstdc++/36173] abi breakage, stdio_filebuf routines missing

[bkoz at gcc dot gnu dot org]

--- Comment #2 from bkoz at gcc dot gnu dot org  2009-01-24 02:33 ---
Mine.


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bkoz at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |bkoz at gcc dot gnu dot org
   |dot org |
 Status|UNCONFIRMED |ASSIGNED
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2009-01-24 02:33:35
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36173

[Bug libstdc++/36173] abi breakage, stdio_filebuf routines missing

[bkoz at gcc dot gnu dot org]

--- Comment #3 from bkoz at gcc dot gnu dot org  2009-01-24 02:45 ---

Please note there are no ABI baseline files checked in to the FSF GCC
repository for darwin for this (or any) release on this (or any) architecture.
Without these, there can be no automated ABI testing by the GCC community. 

Thus, there is no ABI to break for your release/target, and this bug is
invalid. 

If this is something you'd like to see supported on your target in the future,
please consider activating the make check-abi rule and checking in the ABI
baseline files (baseline_symbols.txt) to the
config/abi/post/[powerpc|i686]_darwin directories. 

Now, to answer the stated question.

On x86_64-linux-gnu, gcc-4.0.4 has the following stdio_filebuf exports in
baseline_symbols.txt:
OBJECT:24:_ZTIN9__gnu_cxx13stdio_filebufIcSt11char_traitsIcEEE@@GLIBCXX_3.4
OBJECT:24:_ZTIN9__gnu_cxx13stdio_filebufIwSt11char_traitsIwEEE@@GLIBCXX_3.4
OBJECT:49:_ZTSN9__gnu_cxx13stdio_filebufIcSt11char_traitsIcEEE@@GLIBCXX_3.4
OBJECT:49:_ZTSN9__gnu_cxx13stdio_filebufIwSt11char_traitsIwEEE@@GLIBCXX_3.4

These match gcc-4.2.4. Analysis of prior baseline_symbols.txt files (from
gcc-3.4.6) show similar exports for this class. 

For the record, later versions of gcc, starting with gcc-4.3.0, still have only
these exports.

If darwin exported additional member functions in gcc-4.0.0 for stdio_filebuf,
then it did so in divergence with the linux baselines.

Hope this helps.


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bkoz at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution||INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36173

[Bug libstdc++/36173] abi breakage, stdio_filebuf routines missing

[mrs at apple dot com]

--- Comment #4 from mrs at apple dot com  2009-01-24 04:22 ---
First, you didn't test 4.0.0, so all your reasoning is invalid.  Second,
claiming no ABI breakage when there is abi breakage is silly.  I guess if you
have no customers with no software, with do previously deployed software and
you don't care about abi breakage, you can get away with it.  Unfortunately,
this doesn't apply in our case.

I'd rather you close this out as won't fix, if you can't be bothered to even
actually check the abi of gcc-4.0.0 and compare it against 4.2.1, it is more
honest.  Closing it as invalid is wrong.

:-(


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36173

[Bug libstdc++/36173] abi breakage, stdio_filebuf routines missing

[rguenth at gcc dot gnu dot org]

--- Comment #1 from rguenth at gcc dot gnu dot org  2008-05-07 19:24 ---
Please confirm this on the top of the 4.2 branch.


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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

   Keywords||ABI


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36173