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-fexcess-precision={standard,fast} and Fortran [Fwd: c-4_5-branch merge plan]


Hi all,

the following item might be interesting for Fortran:

* C99-conforming excess precision.  Main patch:
<http://gcc.gnu.org/ml/gcc-patches/2008-11/msg00105.html>.  Fixes bug
323 [1] for C (other languages would need their own front-end work to
implement suitable predictable semantics under the same command-line
option in order to complete fixing the bug).

[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=323

I have not read through the patch, but maybe Fortran should also support
-fexcess-precision={standard,fast}.

Tobias
--- Begin Message ---
Once 4.4 has branched I plan to merge the changes from c-4_5-branch to 
trunk.  I plan to merge in three logical patches, each one with a logical 
change from the branch and all followups to that change combined into a 
single trunk commit, rather than merging the whole branch at once.

* Constant expressions, VLA size evaluation and delaying folding.  Main 
patch with further information: 
<http://gcc.gnu.org/ml/gcc-patches/2008-10/msg01061.html>.  Fixes bugs 
456, 5675, 19976, 29116, 31871, 35198 and all other known 
target-independent constant expressions or VLA size evaluation C90 and C99 
conformance issues as illustrated by the many testcases added.

* C99-conforming excess precision.  Main patch: 
<http://gcc.gnu.org/ml/gcc-patches/2008-11/msg00105.html>.  Fixes bug 323 
for C (other languages would need their own front-end work to implement 
suitable predictable semantics under the same command-line option in order 
to complete fixing the bug).

* stdint.h.  Main patch: 
<http://gcc.gnu.org/ml/gcc-patches/2008-11/msg00305.html>.  Fixes bug 448 
for glibc/uClibc, newlib and Solaris.  Can be extended to fix for other 
targets by defining appropriate macros in the relevant tm.h headers and 
setting use_gcc_stdint appropriately in config.gcc according to whether 
the target has its own stdint.h header.  Once this is in I'll post a list 
of target OSes needing these definitions (and if necessary, in due course 
propose deprecations of targets for which no-one has added the 
definitions, so we can move to the state where target stdint.h can be 
presumed to be available and the Fortran compiler will always have the 
information needed for the bindings to these types).

The excess precision patch depends on the constant expressions patch.  
There are no dependencies between the stdint.h patch and the others.

-- 
Joseph S. Myers
joseph@codesourcery.com


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