diff options
Diffstat (limited to 'gcc/f/NEWS')
| -rw-r--r-- | gcc/f/NEWS | 188 |
1 files changed, 110 insertions, 78 deletions
diff --git a/gcc/f/NEWS b/gcc/f/NEWS index 2cde7928341..b8b524309ca 100644 --- a/gcc/f/NEWS +++ b/gcc/f/NEWS @@ -2,7 +2,7 @@ `news0.texi' and `news.texi'. `NEWS' is *not* a source file, although it is normally included within source distributions. - This file lists news about the EGCS-1.2 version (and some other + This file lists news about the GCC-2.95 version (and some other versions) of the GNU Fortran compiler. Copyright (C) 1995-1999 Free Software Foundation, Inc. You may copy, distribute, and modify it freely as long as you preserve this copyright notice and permission @@ -50,7 +50,7 @@ particularly concentrated on any version of this information that is distributed as part of a *released* `g77'. In particular, while this information is intended to apply to the -EGCS-1.2 version of `g77', only an official *release* of that version +GCC-2.95 version of `g77', only an official *release* of that version is expected to contain documentation that is most consistent with the `g77' product in that version. @@ -64,12 +64,12 @@ about previous `g77' versions up-to-date. An online, "live" version of this document (derived directly from the mainline, development version of `g77' within `egcs') is available -at `http://egcs.cygnus.com/onlinedocs/g77_news.html'. +at `http://www.gnu.org/software/gcc/onlinedocs/g77_news.html'. - The following information was last updated on 1999-05-13: + The following information was last updated on 1999-07-08: -In `egcs' 1.2 (versus 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 conversions, of `REAL' or `COMPLEX' constant expressions to type @@ -87,30 +87,40 @@ In `egcs' 1.2 (versus 1.1.2): now assigns through a temporary, in cases where such partial overlap is deemed possible. - 4. Automatic arrays now seem to be working on HP-UX systems. + 4. `libg2c' (`libf2c') no longer loses track of the file being worked + on during a `BACKSPACE' operation. - 5. Fix `g77' so it no longer crashes when compiling I/O statements + 5. `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)'. + + 6. Automatic arrays now seem to be working on HP-UX systems. + + 7. The `Date' intrinsic now returns the correct result on big-endian + systems. + + 8. 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. - 6. Fix `g77' so it properly handles `DATA A/RPT*VAL/', where RPT is + 9. 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'. - 7. The `-ax' option is now obeyed when compiling Fortran programs. + 10. 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 - run-time bounds checks of array subscripts, as well as of - substring start and end points. + * The new `-fbounds-check' option causes `g77' to compile run-time + bounds checks of array subscripts, as well as of substring start + and end points. - The current implementation uses the `libf2c' library routine - `s_rnge' to print the diagnostic. Since a future version of `g77' - might use a different implementation, use the new - `-ff2c-subscript-check' option if your application requires use of - `s_rnge' or a compile-time diagnostic. + * `libg2c' now supports building as multilibbed library, which + provides better support for systems that require options such as + `-mieee' to work properly. * Source file names with the suffixes `.FOR' and `.FPP' now are recognized by `g77' as if they ended in `.for' and `.fpp', @@ -123,12 +133,12 @@ In `egcs' 1.2 (versus 1.1.2): consistent with the other subroutine forms of `libU77' intrinsics. * `g77' now warns about a reference to an intrinsic that has an - interface that is not Year 2000 (Y2K) compliant. Also, the - `libg2c' has been changed to increase the likelihood of catching - references to the implementations of these intrinsics using the - `EXTERNAL' mechanism (which would avoid the new warnings). + interface that is not Year 2000 (Y2K) compliant. Also, `libg2c' + has been changed to increase the likelihood of catching references + to the implementations of these intrinsics using the `EXTERNAL' + mechanism (which would avoid the new warnings). - 8. `g77' now warns about a reference to a function when the + 11. `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. @@ -139,19 +149,23 @@ In `egcs' 1.2 (versus 1.1.2): * The `-malign-double' option now reliably aligns *all* double-precision variables and arrays on Intel x86 targets. - 9. Even without the `-malign-double' option, `g77' reliably aligns + 12. Even without the `-malign-double' option, `g77' reliably aligns local double-precision variables that are not in `EQUIVALENCE' areas and not `SAVE''d. + 13. `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. - 10. `g77' developers can temporarily use the `-fflatten-arrays' option + 14. `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 + 15. 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 @@ -159,14 +173,35 @@ In `egcs' 1.2 (versus 1.1.2): * Support for the `-fugly' option has been removed. - 12. Improve documentation and indexing, including information on Year + 16. Improve documentation and indexing, including information on Year 2000 (Y2K) compliance, and providing more information on internals of the front end. - 13. Upgrade to `libf2c' as of 1999-05-10. + 17. Upgrade to `libf2c' as of 1999-05-10. + +In 0.5.24 versus 0.5.23: +======================== + + There is no `g77' version 0.5.24 at this time, or planned. 0.5.24 +is the version number designated for bug fixes and, perhaps, some new +features added, to 0.5.23. Version 0.5.23 requires `gcc' 2.8.1, as +0.5.24 was planned to require. -In 0.5.24 and `egcs' 1.1.2 (versus 0.5.23 and 1.1.1): -===================================================== + Due to `EGCS' becoming `GCC' (which is now an acronym for "GNU +Compiler Collection"), and `EGCS' 1.2 becoming officially designated +`GCC' 2.95, there seems to be no need for an actual 0.5.24 release. + + To reduce the confusion already resulting from use of 0.5.24 to +designate `g77' versions within `EGCS' versions 1.0 and 1.1, as well as +in versions of `g77' documentation and notices during that period, +"mainline" `g77' version numbering resumes at 0.5.25 with `GCC' 2.95 +(`EGCS' 1.2), skipping over 0.5.24 as a placeholder version number. + + To repeat, there is no `g77' 0.5.24, but there is now a 0.5.25. +Please remain calm and return to your keypunch units. + +In `EGCS' 1.1.2 versus `EGCS' 1.1.1: +==================================== * Fix the `IDate' intrinsic (VXT) (in `libg2c') so the returned year is in the documented, non-Y2K-compliant range of 0-99, instead of @@ -180,8 +215,8 @@ In 0.5.24 and `egcs' 1.1.2 (versus 0.5.23 and 1.1.1): * Improve documentation. -In 0.5.24 and `egcs' 1.1.1 (versus 0.5.23 and 1.1): -=================================================== +In `EGCS' 1.1.1 versus `EGCS' 1.1: +================================== * Fix `libg2c' so it performs an implicit `ENDFILE' operation (as appropriate) whenever a `REWIND' is done. @@ -202,51 +237,28 @@ In 0.5.24 and `egcs' 1.1.1 (versus 0.5.23 and 1.1): some systems (those with shells requiring `else true' clauses on `if' constructs for the completion code to be set properly). -In `egcs' 1.1 (versus 0.5.24): -============================== - - 14. Fix `g77' crash compiling code containing the construct - `CMPLX(0.)' or similar. - - 15. Fix `g77' crash (or apparently infinite run-time) when compiling - certain complicated expressions involving `COMPLEX' arithmetic - (especially multiplication). - - 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. - - The x87 coprocessor stack was being mismanaged in cases involving - assigned `GOTO' and `ASSIGN'. - - * Align static double-precision variables and arrays on Intel x86 - targets regardless of whether `-malign-double' is specified. - - Generally, this affects only local variables and arrays having the - `SAVE' attribute or given initial values via `DATA'. - -In `egcs' 1.1 (versus `egcs' 1.0.3): -==================================== +In `EGCS' 1.1 versus `EGCS' 1.0.3: +================================== - 17. Fix bugs in the `libU77' intrinsic `HostNm' that wrote one byte + 18. 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. - 18. Assumed arrays with negative bounds (such as `REAL A(-1:*)') no + 19. 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'. - 19. Valid combinations of `EXTERNAL', passing that external as a dummy + 20. 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'. - 20. `CASE DEFAULT' no longer crashes `g77'. + 21. `CASE DEFAULT' no longer crashes `g77'. - 21. The `-Wunused' option no longer issues a spurious warning about + 22. The `-Wunused' option no longer issues a spurious warning about the "master" procedure generated by `g77' for procedures containing `ENTRY' statements. @@ -271,25 +283,25 @@ In `egcs' 1.1 (versus `egcs' 1.0.3): `libf2c' environment, even when `libf2c' (now `libg2c') is a shared library. - 22. `g77' no longer installs the `f77' command and `f77.1' man page in + 23. `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. - 23. `g77' no longer installs the `libf2c.a' library and `f2c.h' + 24. `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. - 24. The `libf2c.a' library produced by `g77' has been renamed to + 25. 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. - 25. The `f2c.h' include (header) file produced by `g77' has been + 26. 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 @@ -301,11 +313,11 @@ In `egcs' 1.1 (versus `egcs' 1.0.3): than the one built and installed as part of the same `g77' version is picked up. - 26. During the configuration and build process, `g77' creates + 27. 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. - 27. `install-info' now used to update the directory of Info + 28. `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 @@ -314,28 +326,38 @@ In `egcs' 1.1 (versus `egcs' 1.0.3): in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and about truncations of various sorts of constants. - 28. Improve compilation of `FORMAT' expressions so that a null byte is + 29. 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'. - 29. Improve documentation and indexing. + 30. Improve documentation and indexing. - 30. The upgrade to `libf2c' as of 1998-06-18 should fix a variety of + 31. 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): -========================================= +In `EGCS' 1.1 versus `g77' 0.5.23: +================================== + + 32. 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 + 33. `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. `g77' no longer crashes when compiling code containing + 34. Fix `g77' crash compiling code containing the construct + `CMPLX(0.)' or similar. + + 35. `g77' no longer crashes when compiling code containing specification statements such as `INTEGER(KIND=7) PTR'. - 33. `g77' no longer crashes when compiling code such as `J = SIGNAL(1, + 36. `g77' no longer crashes when compiling code such as `J = SIGNAL(1, 2)'. * `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary" @@ -346,6 +368,16 @@ In 0.5.24 and `egcs' 1.1 (versus 0.5.23): Previously, `g77' treated these expressions as denoting special "pointer" arguments for the purposes of filewide analysis. + 37. Fix `g77' crash (or apparently infinite run-time) when compiling + certain complicated expressions involving `COMPLEX' arithmetic + (especially multiplication). + + * Align static double-precision variables and arrays on Intel x86 + targets regardless of whether `-malign-double' is specified. + + Generally, this affects only local variables and arrays having the + `SAVE' attribute or given initial values via `DATA'. + * The `g77' driver now ensures that `-lg2c' is specified in the link phase prior to any occurrence of `-lm'. This prevents accidentally linking to a routine in the SunOS4 `-lm' library when @@ -366,9 +398,9 @@ In 0.5.24 and `egcs' 1.1 (versus 0.5.23): * The F90 `System_Clock' intrinsic allows the optional arguments (except for the `Count' argument) to be omitted. - 34. Upgrade to `libf2c' as of 1998-06-18. + 38. Upgrade to `libf2c' as of 1998-06-18. - 35. Improve documentation and indexing. + 39. Improve documentation and indexing. In previous versions: ===================== |