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Commit 1f8da629 by Craig Burley
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update derived files 

From-SVN: r28019
parent cdc1e12a
Showing with 61 additions and 38 deletions
gcc/f/NEWS
...@@ -66,43 +66,66 @@ about previous `g77' versions up-to-date. ...@@ -66,43 +66,66 @@ about previous `g77' versions up-to-date.
the mainline, development version of `g77' within `egcs') is available the mainline, development version of `g77' within `egcs') is available
at `http://egcs.cygnus.com/onlinedocs/g77_news.html'. 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: 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 conversions, of `REAL' or `COMPLEX' constant expressions to type
`INTEGER(KIND=2)' (often referred to as `INTEGER*8'). `INTEGER(KIND=2)' (often referred to as `INTEGER*8').
For example, `INTEGER*8 J; J = 4E10' now works as documented. 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 subscript expressions when evaluating array references on systems
with pointers widers than `INTEGER(KIND=1)' (such as Alphas). 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 `COMPLEX' variable or array that partially overlaps one or more of
the sources of the same assignment (a very rare construction). It the sources of the same assignment (a very rare construction). It
now assigns through a temporary, in cases where such partial now assigns through a temporary, in cases where such partial
overlap is deemed possible. 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. 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', using keywords that define `INTEGER' values, such as `IOSTAT=J',
where J is other than default `INTEGER' (such as `INTEGER*2'). where J is other than default `INTEGER' (such as `INTEGER*2').
Instead, it issues a diagnostic. 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 not default `INTEGER', such as `INTEGER*2', instead of producing a
spurious diagnostic. Also fix `DATA (A(I),I=1,N)', where `N' is spurious diagnostic. Also fix `DATA (A(I),I=1,N)', where `N' is
not default `INTEGER' to work instead of crashing `g77'. 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.) (It is passed to the `f771' driver.)
* The new `-fbounds-check' option causes `g77' to compile run-time * The new `-fbounds-check' option causes `g77' to compile run-time
...@@ -129,7 +152,7 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2: ...@@ -129,7 +152,7 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2:
to the implementations of these intrinsics using the `EXTERNAL' to the implementations of these intrinsics using the `EXTERNAL'
mechanism (which would avoid the new warnings). 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 corresponding *subsequent* function program unit disagrees with
the reference concerning the type of the function. the reference concerning the type of the function.
...@@ -140,23 +163,23 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2: ...@@ -140,23 +163,23 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2:
* The `-malign-double' option now reliably aligns *all* * The `-malign-double' option now reliably aligns *all*
double-precision variables and arrays on Intel x86 targets. 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' local double-precision variables that are not in `EQUIVALENCE'
areas and not `SAVE''d. 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 instead of generating a run-time call to the `libf2c' routines
`c_div' or `z_div', unless the `-Os' option is specified. `c_div' or `z_div', unless the `-Os' option is specified.
* `g77' no longer generates code to maintain `errno', a C-language * `g77' no longer generates code to maintain `errno', a C-language
concept, when performing operations such as the `SqRt' intrinsic. 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 to compare how the compiler handles code generation using C-like
constructs as compared to the Fortran-like method constructs constructs as compared to the Fortran-like method constructs
normally used. 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 component was rewritten. It now generates code using facilities
more robustly supported by the `gcc' back end. One effect of this more robustly supported by the `gcc' back end. One effect of this
rewrite is that some codes no longer produce a spurious "label LAB rewrite is that some codes no longer produce a spurious "label LAB
...@@ -164,11 +187,11 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2: ...@@ -164,11 +187,11 @@ In 0.5.25, `GCC' 2.95 (`EGCS' 1.2) versus `EGCS' 1.1.2:
* Support for the `-fugly' option has been removed. * 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 2000 (Y2K) compliance, and providing more information on internals
of the front end. 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 0.5.24 versus 0.5.23:
======================== ========================
...@@ -231,25 +254,25 @@ In `EGCS' 1.1.1 versus `EGCS' 1.1: ...@@ -231,25 +254,25 @@ In `EGCS' 1.1.1 versus `EGCS' 1.1:
In `EGCS' 1.1 versus `EGCS' 1.0.3: 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' beyond the end of its `CHARACTER' argument, and in the `libU77'
intrinsics `GMTime' and `LTime' that overwrote their arguments. 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 longer elicit spurious diagnostics from `g77', even on systems
with pointers having different sizes than integers. with pointers having different sizes than integers.
This bug is not known to have existed in any recent version of This bug is not known to have existed in any recent version of
`gcc'. It was introduced in an early release of `egcs'. `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 argument without explicitly giving it a type, and, in a subsequent
program unit, referencing that external as an external function program unit, referencing that external as an external function
with a different type no longer crash `g77'. 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 the "master" procedure generated by `g77' for procedures
containing `ENTRY' statements. containing `ENTRY' statements.
...@@ -274,25 +297,25 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3: ...@@ -274,25 +297,25 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3:
`libf2c' environment, even when `libf2c' (now `libg2c') is a `libf2c' environment, even when `libf2c' (now `libg2c') is a
shared library. 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' the `/usr' or `/usr/local' heirarchy, even if the `f77-install-ok'
file exists in the source or build directory. See the file exists in the source or build directory. See the
installation documentation for more information. 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 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 `f2c-install-ok' or `f2c-exists-ok' files exist in the source or
build directory. See the installation documentation for more build directory. See the installation documentation for more
information. 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 `libg2c.a'. It is installed only in the `gcc' "private" directory
heirarchy, `gcc-lib'. This allows system administrators and users heirarchy, `gcc-lib'. This allows system administrators and users
to choose which version of the `libf2c' library from `netlib' they to choose which version of the `libf2c' library from `netlib' they
wish to use on a case-by-case basis. See the installation wish to use on a case-by-case basis. See the installation
documentation for more information. 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" renamed to `g2c.h'. It is installed only in the `gcc' "private"
directory heirarchy, `gcc-lib'. This allows system administrators directory heirarchy, `gcc-lib'. This allows system administrators
and users to choose which version of the include file from and users to choose which version of the include file from
...@@ -304,11 +327,11 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3: ...@@ -304,11 +327,11 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3:
than the one built and installed as part of the same `g77' version than the one built and installed as part of the same `g77' version
is picked up. 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 subdirectories it needs only as it needs them. Other cleaning up
of the configuration and build process has been performed as well. 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). documentation to contain an entry for `g77' (during installation).
* Some diagnostics have been changed from warnings to errors, to * Some diagnostics have been changed from warnings to errors, to
...@@ -317,38 +340,38 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3: ...@@ -317,38 +340,38 @@ In `EGCS' 1.1 versus `EGCS' 1.0.3:
in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and
about truncations of various sorts of constants. 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 appended to the last operand if it is a constant. This provides a
cleaner run-time diagnostic as provided by `libf2c' for statements cleaner run-time diagnostic as provided by `libf2c' for statements
like `PRINT '(I1', 42'. 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 problems, including those involving some uses of the `T' format
specifier, and perhaps some build (porting) problems as well. specifier, and perhaps some build (porting) problems as well.
In `EGCS' 1.1 versus `g77' 0.5.23: 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 `-O2' was specified compiling, for example, an old version of the
`DNRM2' routine. `DNRM2' routine.
The x87 coprocessor stack was being mismanaged in cases involving The x87 coprocessor stack was being mismanaged in cases involving
assigned `GOTO' and `ASSIGN'. 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" `EQUIVALENCE' and `COMMON' aggregates that, due to "unnatural"
ordering of members vis-a-vis their types, require initial padding. 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. `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'. 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)'. 2)'.
* `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary" * `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary"
...@@ -359,7 +382,7 @@ In `EGCS' 1.1 versus `g77' 0.5.23: ...@@ -359,7 +382,7 @@ In `EGCS' 1.1 versus `g77' 0.5.23:
Previously, `g77' treated these expressions as denoting special Previously, `g77' treated these expressions as denoting special
"pointer" arguments for the purposes of filewide analysis. "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 certain complicated expressions involving `COMPLEX' arithmetic
(especially multiplication). (especially multiplication).
...@@ -389,9 +412,9 @@ In `EGCS' 1.1 versus `g77' 0.5.23: ...@@ -389,9 +412,9 @@ In `EGCS' 1.1 versus `g77' 0.5.23:
* The F90 `System_Clock' intrinsic allows the optional arguments * The F90 `System_Clock' intrinsic allows the optional arguments
(except for the `Count' argument) to be omitted. (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: In previous versions:
===================== =====================
......
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