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 1999-06-16:
+ The following information was last updated on 1999-07-08:
+
+In development:
+===============
+
+ 1. The `TtyNam' intrinsics now set NAME to all spaces (at run time)
+ if the system has no `ttyname' implementation available.
+
+ 2. Upgrade to `libf2c' as of 1999-06-28.
+
+ This fixes a bug whereby input to a `NAMELIST' read involving a
+ repeat count, such as `K(5)=10*3', was not properly handled by
+ `libf2c'. The first item was written to `K(5)', but the remaining
+ nine were written elsewhere (still within the array), not
+ necessarily starting at `K(6)'.
In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2:
=======================================================
- 1. `g77' no longer generates bad code for assignments, or other
+ 3. `g77' no longer generates bad code for assignments, or other
conversions, of `REAL' or `COMPLEX' constant expressions to type
`INTEGER(KIND=2)' (often referred to as `INTEGER*8').
For example, `INTEGER*8 J; J = 4E10' now works as documented.
- 2. `g77' no longer truncates `INTEGER(KIND=2)' (usually `INTEGER*8')
+ 4. `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
+ 5. `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.
- 4. `libg2c' (`libf2c') no longer loses track of the file being worked
+ 6. `libg2c' (`libf2c') no longer loses track of the file being worked
on during a `BACKSPACE' operation.
- 5. Automatic arrays now seem to be working on HP-UX systems.
+ 7. `libg2c' (`libf2c') fixes a bug whereby input to a `NAMELIST' read
+ involving a repeat count, such as `K(5)=10*3', was not properly
+ handled by `libf2c'. The first item was written to `K(5)', but
+ the remaining nine were written elsewhere (still within the array),
+ not necessarily starting at `K(6)'.
+
+ 8. Automatic arrays now seem to be working on HP-UX systems.
+
+ 9. The `Date' intrinsic now returns the correct result on big-endian
+ systems.
- 6. Fix `g77' so it no longer crashes when compiling I/O statements
+ 10. 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.
- 7. Fix `g77' so it properly handles `DATA A/RPT*VAL/', where RPT is
+ 11. 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'.
- 8. The `-ax' option is now obeyed when compiling Fortran programs.
+ 12. The `-ax' option is now obeyed when compiling Fortran programs.
(It is passed to the `f771' driver.)
* The new `-fbounds-check' option causes `g77' to compile run-time
to the implementations of these intrinsics using the `EXTERNAL'
mechanism (which would avoid the new warnings).
- 9. `g77' now warns about a reference to a function when the
+ 13. `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.
- 10. Even without the `-malign-double' option, `g77' reliably aligns
+ 14. Even without the `-malign-double' option, `g77' reliably aligns
local double-precision variables that are not in `EQUIVALENCE'
areas and not `SAVE''d.
- 11. `g77' now open-codes ("inlines") division of `COMPLEX' operands
+ 15. `g77' now open-codes ("inlines") division of `COMPLEX' operands
instead of generating a run-time call to the `libf2c' routines
`c_div' or `z_div', unless the `-Os' option is specified.
* `g77' no longer generates code to maintain `errno', a C-language
concept, when performing operations such as the `SqRt' intrinsic.
- 12. `g77' developers can temporarily use the `-fflatten-arrays' option
+ 16. `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.
- 13. A substantial portion of the `g77' front end's code-generation
+ 17. 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.
- 14. Improve documentation and indexing, including information on Year
+ 18. Improve documentation and indexing, including information on Year
2000 (Y2K) compliance, and providing more information on internals
of the front end.
- 15. Upgrade to `libf2c' as of 1999-05-10.
+ 19. Upgrade to `libf2c' as of 1999-05-10.
In 0.5.24 versus 0.5.23:
========================
In `EGCS' 1.1 versus `EGCS' 1.0.3:
==================================
- 16. Fix bugs in the `libU77' intrinsic `HostNm' that wrote one byte
+ 20. 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.
- 17. Assumed arrays with negative bounds (such as `REAL A(-1:*)') no
+ 21. 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'.
- 18. Valid combinations of `EXTERNAL', passing that external as a dummy
+ 22. 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'.
- 19. `CASE DEFAULT' no longer crashes `g77'.
+ 23. `CASE DEFAULT' no longer crashes `g77'.
- 20. The `-Wunused' option no longer issues a spurious warning about
+ 24. 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.
- 21. `g77' no longer installs the `f77' command and `f77.1' man page in
+ 25. `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.
- 22. `g77' no longer installs the `libf2c.a' library and `f2c.h'
+ 26. `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.
- 23. The `libf2c.a' library produced by `g77' has been renamed to
+ 27. 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.
- 24. The `f2c.h' include (header) file produced by `g77' has been
+ 28. 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.
- 25. During the configuration and build process, `g77' creates
+ 29. 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.
- 26. `install-info' now used to update the directory of Info
+ 30. `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.
- 27. Improve compilation of `FORMAT' expressions so that a null byte is
+ 31. 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'.
- 28. Improve documentation and indexing.
+ 32. Improve documentation and indexing.
- 29. The upgrade to `libf2c' as of 1998-06-18 should fix a variety of
+ 33. 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 `EGCS' 1.1 versus `g77' 0.5.23:
==================================
- 30. Fix a code-generation bug that afflicted Intel x86 targets when
+ 34. Fix a code-generation bug that afflicted Intel x86 targets when
`-O2' was specified compiling, for example, an old version of the
`DNRM2' routine.
The x87 coprocessor stack was being mismanaged in cases involving
assigned `GOTO' and `ASSIGN'.
- 31. `g77' no longer produces incorrect code and initial values for
+ 35. `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.
- 32. Fix `g77' crash compiling code containing the construct
+ 36. Fix `g77' crash compiling code containing the construct
`CMPLX(0.)' or similar.
- 33. `g77' no longer crashes when compiling code containing
+ 37. `g77' no longer crashes when compiling code containing
specification statements such as `INTEGER(KIND=7) PTR'.
- 34. `g77' no longer crashes when compiling code such as `J = SIGNAL(1,
+ 38. `g77' no longer crashes when compiling code such as `J = SIGNAL(1,
2)'.
* `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary"
Previously, `g77' treated these expressions as denoting special
"pointer" arguments for the purposes of filewide analysis.
- 35. Fix `g77' crash (or apparently infinite run-time) when compiling
+ 39. Fix `g77' crash (or apparently infinite run-time) when compiling
certain complicated expressions involving `COMPLEX' arithmetic
(especially multiplication).
* The F90 `System_Clock' intrinsic allows the optional arguments
(except for the `Count' argument) to be omitted.
- 36. Upgrade to `libf2c' as of 1998-06-18.
+ 40. Upgrade to `libf2c' as of 1998-06-18.
- 37. Improve documentation and indexing.
+ 41. Improve documentation and indexing.
In previous versions:
=====================
projects / platform / upstream / gcc.git / commitdiff