the mainline, development version of `g77' within `egcs') is available
at `http://egcs.cygnus.com/onlinedocs/g77_news.html'.
- The following information was last updated on 1999-05-10:
+ The following information was last updated on 1999-05-13:
In `egcs' 1.2 (versus 1.1.2):
=============================
For example, `INTEGER*8 J; J = 4E10' now works as documented.
- 2. `g77' no longer generates bad code for an assignment to a
+ 2. `g77' no longer truncates `INTEGER(KIND=2)' (usually `INTEGER*8')
+ subscript expressions when evaluating array references on systems
+ with pointers widers than `INTEGER(KIND=1)' (such as Alphas).
+
+ 3. `g77' no longer generates bad code for an assignment to a
`COMPLEX' variable or array that partially overlaps one or more of
the sources of the same assignment (a very rare construction). It
now assigns through a temporary, in cases where such partial
overlap is deemed possible.
- 3. Automatic arrays now seem to be working on HP-UX systems.
+ 4. Automatic arrays now seem to be working on HP-UX systems.
- 4. Fix `g77' so it no longer crashes when compiling I/O statements
+ 5. Fix `g77' so it no longer crashes when compiling I/O statements
using keywords that define `INTEGER' values, such as `IOSTAT=J',
where J is other than default `INTEGER' (such as `INTEGER*2').
Instead, it issues a diagnostic.
- 5. Fix `g77' so it properly handles `DATA A/RPT*VAL/', where RPT is
+ 6. Fix `g77' so it properly handles `DATA A/RPT*VAL/', where RPT is
not default `INTEGER', such as `INTEGER*2', instead of producing a
spurious diagnostic. Also fix `DATA (A(I),I=1,N)', where `N' is
not default `INTEGER' to work instead of crashing `g77'.
- 6. The `-ax' option is now obeyed when compiling Fortran programs.
+ 7. The `-ax' option is now obeyed when compiling Fortran programs.
(It is passed to the `f771' driver.)
* The new `-fsubscript-check' option causes `g77' to compile
references to the implementations of these intrinsics using the
`EXTERNAL' mechanism (which would avoid the new warnings).
- 7. `g77' now warns about a reference to a function when the
+ 8. `g77' now warns about a reference to a function when the
corresponding *subsequent* function program unit disagrees with
the reference concerning the type of the function.
* The `-malign-double' option now reliably aligns *all*
double-precision variables and arrays on Intel x86 targets.
- 8. Even without the `-malign-double' option, `g77' reliably aligns
+ 9. Even without the `-malign-double' option, `g77' reliably aligns
local double-precision variables that are not in `EQUIVALENCE'
areas and not `SAVE''d.
- 9. A substantial portion of the `g77' front end's code-generation
+ * `g77' no longer generates code to maintain `errno', a C-language
+ concept, when performing operations such as the `SqRt' intrinsic.
+
+ 10. `g77' developers can temporarily use the `-fflatten-arrays' option
+ to compare how the compiler handles code generation using C-like
+ constructs as compared to the Fortran-like method constructs
+ normally used.
+
+ 11. A substantial portion of the `g77' front end's code-generation
component was rewritten. It now generates code using facilities
more robustly supported by the `gcc' back end. One effect of this
rewrite is that some codes no longer produce a spurious "label LAB
* Support for the `-fugly' option has been removed.
- 10. Improve documentation and indexing, including information on Year
+ 12. Improve documentation and indexing, including information on Year
2000 (Y2K) compliance, and providing more information on internals
of the front end.
- 11. Upgrade to `libf2c' as of 1999-05-10.
+ 13. Upgrade to `libf2c' as of 1999-05-10.
In 0.5.24 and `egcs' 1.1.2 (versus 0.5.23 and 1.1.1):
=====================================================
In `egcs' 1.1 (versus 0.5.24):
==============================
- 12. Fix `g77' crash compiling code containing the construct
+ 14. Fix `g77' crash compiling code containing the construct
`CMPLX(0.)' or similar.
- 13. Fix `g77' crash (or apparently infinite run-time) when compiling
+ 15. Fix `g77' crash (or apparently infinite run-time) when compiling
certain complicated expressions involving `COMPLEX' arithmetic
(especially multiplication).
- 14. Fix a code-generation bug that afflicted Intel x86 targets when
+ 16. Fix a code-generation bug that afflicted Intel x86 targets when
`-O2' was specified compiling, for example, an old version of the
`DNRM2' routine.
In `egcs' 1.1 (versus `egcs' 1.0.3):
====================================
- 15. Fix bugs in the `libU77' intrinsic `HostNm' that wrote one byte
+ 17. Fix bugs in the `libU77' intrinsic `HostNm' that wrote one byte
beyond the end of its `CHARACTER' argument, and in the `libU77'
intrinsics `GMTime' and `LTime' that overwrote their arguments.
- 16. Assumed arrays with negative bounds (such as `REAL A(-1:*)') no
+ 18. Assumed arrays with negative bounds (such as `REAL A(-1:*)') no
longer elicit spurious diagnostics from `g77', even on systems
with pointers having different sizes than integers.
This bug is not known to have existed in any recent version of
`gcc'. It was introduced in an early release of `egcs'.
- 17. Valid combinations of `EXTERNAL', passing that external as a dummy
+ 19. Valid combinations of `EXTERNAL', passing that external as a dummy
argument without explicitly giving it a type, and, in a subsequent
program unit, referencing that external as an external function
with a different type no longer crash `g77'.
- 18. `CASE DEFAULT' no longer crashes `g77'.
+ 20. `CASE DEFAULT' no longer crashes `g77'.
- 19. The `-Wunused' option no longer issues a spurious warning about
+ 21. The `-Wunused' option no longer issues a spurious warning about
the "master" procedure generated by `g77' for procedures
containing `ENTRY' statements.
`libf2c' environment, even when `libf2c' (now `libg2c') is a
shared library.
- 20. `g77' no longer installs the `f77' command and `f77.1' man page in
+ 22. `g77' no longer installs the `f77' command and `f77.1' man page in
the `/usr' or `/usr/local' heirarchy, even if the `f77-install-ok'
file exists in the source or build directory. See the
installation documentation for more information.
- 21. `g77' no longer installs the `libf2c.a' library and `f2c.h'
+ 23. `g77' no longer installs the `libf2c.a' library and `f2c.h'
include file in the `/usr' or `/usr/local' heirarchy, even if the
`f2c-install-ok' or `f2c-exists-ok' files exist in the source or
build directory. See the installation documentation for more
information.
- 22. The `libf2c.a' library produced by `g77' has been renamed to
+ 24. The `libf2c.a' library produced by `g77' has been renamed to
`libg2c.a'. It is installed only in the `gcc' "private" directory
heirarchy, `gcc-lib'. This allows system administrators and users
to choose which version of the `libf2c' library from `netlib' they
wish to use on a case-by-case basis. See the installation
documentation for more information.
- 23. The `f2c.h' include (header) file produced by `g77' has been
+ 25. The `f2c.h' include (header) file produced by `g77' has been
renamed to `g2c.h'. It is installed only in the `gcc' "private"
directory heirarchy, `gcc-lib'. This allows system administrators
and users to choose which version of the include file from
than the one built and installed as part of the same `g77' version
is picked up.
- 24. During the configuration and build process, `g77' creates
+ 26. During the configuration and build process, `g77' creates
subdirectories it needs only as it needs them. Other cleaning up
of the configuration and build process has been performed as well.
- 25. `install-info' now used to update the directory of Info
+ 27. `install-info' now used to update the directory of Info
documentation to contain an entry for `g77' (during installation).
* Some diagnostics have been changed from warnings to errors, to
in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and
about truncations of various sorts of constants.
- 26. Improve compilation of `FORMAT' expressions so that a null byte is
+ 28. Improve compilation of `FORMAT' expressions so that a null byte is
appended to the last operand if it is a constant. This provides a
cleaner run-time diagnostic as provided by `libf2c' for statements
like `PRINT '(I1', 42'.
- 27. Improve documentation and indexing.
+ 29. Improve documentation and indexing.
- 28. The upgrade to `libf2c' as of 1998-06-18 should fix a variety of
+ 30. The upgrade to `libf2c' as of 1998-06-18 should fix a variety of
problems, including those involving some uses of the `T' format
specifier, and perhaps some build (porting) problems as well.
In 0.5.24 and `egcs' 1.1 (versus 0.5.23):
=========================================
- 29. `g77' no longer produces incorrect code and initial values for
+ 31. `g77' no longer produces incorrect code and initial values for
`EQUIVALENCE' and `COMMON' aggregates that, due to "unnatural"
ordering of members vis-a-vis their types, require initial padding.
- 30. `g77' no longer crashes when compiling code containing
+ 32. `g77' no longer crashes when compiling code containing
specification statements such as `INTEGER(KIND=7) PTR'.
- 31. `g77' no longer crashes when compiling code such as `J = SIGNAL(1,
+ 33. `g77' no longer crashes when compiling code such as `J = SIGNAL(1,
2)'.
* `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary"
* The F90 `System_Clock' intrinsic allows the optional arguments
(except for the `Count' argument) to be omitted.
- 32. Upgrade to `libf2c' as of 1998-06-18.
+ 34. Upgrade to `libf2c' as of 1998-06-18.
- 33. Improve documentation and indexing.
+ 35. Improve documentation and indexing.
In previous versions:
=====================
projects / gcc.git / commitdiff