+++ /dev/null
-This is g77.info, produced by makeinfo version 4.5 from g77.texi.
-
-INFO-DIR-SECTION Programming
-START-INFO-DIR-ENTRY
-* g77: (g77). The GNU Fortran compiler.
-END-INFO-DIR-ENTRY
- This file documents the use and the internals of the GNU Fortran
-(`g77') compiler. It corresponds to the GCC-3.2.3 version of `g77'.
-
- Published by the Free Software Foundation 59 Temple Place - Suite 330
-Boston, MA 02111-1307 USA
-
- Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002 Free Software
-Foundation, Inc.
-
- Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.1 or
-any later version published by the Free Software Foundation; with the
-Invariant Sections being "GNU General Public License" and "Funding Free
-Software", the Front-Cover texts being (a) (see below), and with the
-Back-Cover Texts being (b) (see below). A copy of the license is
-included in the section entitled "GNU Free Documentation License".
-
- (a) The FSF's Front-Cover Text is:
-
- A GNU Manual
-
- (b) The FSF's Back-Cover Text is:
-
- You have freedom to copy and modify this GNU Manual, like GNU
-software. Copies published by the Free Software Foundation raise
-funds for GNU development.
-
- Contributed by James Craig Burley (<craig@jcb-sc.com>). Inspired by
-a first pass at translating `g77-0.5.16/f/DOC' that was contributed to
-Craig by David Ronis (<ronis@onsager.chem.mcgill.ca>).
-
-\1f
-File: g77.info, Node: News, Next: Changes, Prev: Invoking G77, Up: Top
-
-News About GNU Fortran
-**********************
-
- Changes made to recent versions of GNU Fortran are listed below,
-with the most recent version first.
-
- The changes are generally listed in order:
-
- 1. Code-generation and run-time-library bug-fixes
-
- 2. Compiler and run-time-library crashes involving valid code that
- have been fixed
-
- 3. New features
-
- 4. Fixes and enhancements to existing features
-
- 5. New diagnostics
-
- 6. Internal improvements
-
- 7. Miscellany
-
- This order is not strict--for example, some items involve a
-combination of these elements.
-
- Note that two variants of `g77' are tracked below. The `egcs'
-variant is described vis-a-vis previous versions of `egcs' and/or an
-official FSF version, as appropriate. Note that all such variants are
-obsolete _as of July 1999_ - the information is retained here only for
-its historical value.
-
- Therefore, `egcs' versions sometimes have multiple listings to help
-clarify how they differ from other versions, though this can make
-getting a complete picture of what a particular `egcs' version contains
-somewhat more difficult.
-
- For information on bugs in the GCC-3.2.3 version of `g77', see *Note
-Known Bugs In GNU Fortran: Known Bugs.
-
- An online, "live" version of this document (derived directly from
-the mainline, development version of `g77' within `gcc') is available at
-`http://www.gnu.org/software/gcc/onlinedocs/g77/News.html'.
-
- The following information was last updated on 2002-10-28:
-
-In `GCC' 3.2 versus `GCC' 3.1:
-==============================
-
- * Problem Reports fixed (in chronological order of submission):
- `8308'
- gcc-3.x does not compile files with suffix .r (RATFOR) [Fixed
- in 3.2.1]
-
-In `GCC' 3.1 (formerly known as g77-0.5.27) versus `GCC' 3.0:
-=============================================================
-
- * Problem Reports fixed (in chronological order of submission):
- `947'
- Data statement initialization with subscript of kind INTEGER*2
-
- `3743'
- Reference to intrinsic `ISHFT' invalid
-
- `3807'
- Function BESJN(integer,double) problems
-
- `3957'
- g77 -pipe -xf77-cpp-input sends output to stdout
-
- `4279'
- g77 -h" gives bogus output
-
- `4730'
- ICE on valid input using CALL EXIT(%VAL(...))
-
- `4752'
- g77 -v -c -xf77-version /dev/null -xnone causes ice
-
- `4885'
- BACKSPACE example that doesn't work as of gcc/g77-3.0.x
-
- `5122'
- g77 rejects accepted use of INTEGER*2 as type of DATA
- statement loop index
-
- `5397'
- ICE on compiling source with 540 000 000 REAL array
-
- `5473'
- ICE on BESJN(integer*8,real)
-
- `5837'
- bug in loop unrolling
-
- * `g77' now has its man page generated from the texinfo
- documentation, to guarantee that it remains up to date.
-
- * `g77' used to reject the following program on 32-bit targets:
- PROGRAM PROG
- DIMENSION A(140 000 000)
- END
- with the message:
- prog.f: In program `prog':
- prog.f:2:
- DIMENSION A(140 000 000)
- ^
- Array `a' at (^) is too large to handle
- because 140 000 000 REALs is larger than the largest bit-extent
- that can be expressed in 32 bits. However, bit-sizes never play a
- role after offsets have been converted to byte addresses.
- Therefore this check has been removed, and the limit is now 2
- Gbyte of memory (around 530 000 000 REALs). Note: On GNU/Linux
- systems one has to compile programs that occupy more than 1 Gbyte
- statically, i.e. `g77 -static ...'.
-
- * Based on work done by Juergen Pfeifer (<juergen.pfeifer@gmx.net>)
- libf2c is now a shared library. One can still link in all objects
- with the program by specifying the `-static' option.
-
- * Robert Anderson (<rwa@alumni.princeton.edu>) thought up a two line
- change that enables g77 to compile such code as:
- SUBROUTINE SUB(A, N)
- DIMENSION N(2)
- DIMENSION A(N(1),N(2))
- A(1,1) = 1.
- END
- Note the use of array elements in the bounds of the adjustable
- array A.
-
- * George Helffrich (<george@geo.titech.ac.jp>) implemented a change
- in substring index checking (when specifying `-fbounds-check')
- that permits the use of zero length substrings of the form
- `string(1:0)'.
-
- * Based on code developed by Pedro Vazquez
- (<vazquez@penelope.iqm.unicamp.br>), the `libf2c' library is now
- able to read and write files larger than 2 Gbyte on 32-bit target
- machines, if the operating system supports this.
-
-In 0.5.26, `GCC' 3.0 versus `GCC' 2.95:
-=======================================
-
- * When a REWIND was issued after a WRITE statement on an unformatted
- file, the implicit truncation was performed by copying the
- truncated file to /tmp and copying the result back. This has been
- fixed by using the `ftruncate' OS function. Thanks go to the
- GAMESS developers for bringing this to our attention.
-
- * Using options `-g', `-ggdb' or `-gdwarf[-2]' (where appropriate
- for your target) now also enables debugging information for COMMON
- BLOCK and EQUIVALENCE items to be emitted. Thanks go to Andrew
- Vaught (<andy@xena.eas.asu.edu>) and George Helffrich
- (<george@geology.bristol.ac.uk>) for fixing this longstanding
- problem.
-
- * It is not necessary anymore to use the option `-femulate-complex'
- to compile Fortran code using COMPLEX arithmetic, even on 64-bit
- machines (like the Alpha). This will improve code generation.
-
- * INTRINSIC arithmetic functions are now treated as routines that do
- not depend on anything but their argument(s). This enables
- further instruction scheduling, because it is known that they
- cannot read or modify arbitrary locations.
-
- * Upgrade to `libf2c' as of 2000-12-05.
-
- This fixes a bug where a namelist containing initialization of
- LOGICAL items and a variable starting with T or F would be read
- incorrectly.
-
- * The `TtyNam' intrinsics now set NAME to all spaces (at run time)
- if the system has no `ttyname' implementation available.
-
- * 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:
-=======================================================
-
- * `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.
-
- * `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).
-
- * `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.
-
- * `libg2c' (`libf2c') no longer loses track of the file being worked
- on during a `BACKSPACE' operation.
-
- * `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)'.
-
- * Automatic arrays now seem to be working on HP-UX systems.
-
- * The `Date' intrinsic now returns the correct result on big-endian
- systems.
-
- * 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.
-
- * 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'.
-
- * 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
- bounds checks of array subscripts, as well as of substring start
- and end points.
-
- * `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',
- respectively.
-
- * The order of arguments to the _subroutine_ forms of the `CTime',
- `DTime', `ETime', and `TtyNam' intrinsics has been swapped. The
- argument serving as the returned value for the corresponding
- function forms now is the _second_ argument, making these
- 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, `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).
-
- *Note Year 2000 (Y2K) Problems::, for more information.
-
- * `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.
-
- * `-fno-emulate-complex' is now the default option. This should
- result in improved performance of code that uses the `COMPLEX'
- data type.
-
- * The `-malign-double' option now reliably aligns _all_
- double-precision variables and arrays on Intel x86 targets.
-
- * Even without the `-malign-double' option, `g77' reliably aligns
- local double-precision variables that are not in `EQUIVALENCE'
- areas and not `SAVE''d.
-
- * `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.
-
- * `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.
-
- * 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
- used before containing binding contour" message.
-
- * Support for the `-fugly' option has been removed.
-
- * Improve documentation and indexing, including information on Year
- 2000 (Y2K) compliance, and providing more information on internals
- of the front end.
-
- * 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.
-
- 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
- being returned as 100 in the year 2000.
-
- *Note IDate Intrinsic (VXT)::, for more information.
-
- * Fix the `Date_and_Time' intrinsic (in `libg2c') to return the
- milliseconds value properly in VALUES(8).
-
- * Fix the `LStat' intrinsic (in `libg2c') to return device-ID
- information properly in SARRAY(7).
-
- * Improve documentation.
-
-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.
-
- (This bug was introduced in 0.5.23 and `egcs' 1.1 in `g77''s
- version of `libf2c'.)
-
- * Fix `libg2c' so it no longer crashes with a spurious diagnostic
- upon doing any I/O following a direct formatted write.
-
- (This bug was introduced in 0.5.23 and `egcs' 1.1 in `g77''s
- version of `libf2c'.)
-
- * Fix `g77' so it no longer crashes compiling references to the
- `Rand' intrinsic on some systems.
-
- * Fix `g77' portion of installation process so it works better on
- 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 `EGCS' 1.0.3:
-==================================
-
- * 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.
-
- * 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'.
-
- * 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'.
-
- * `CASE DEFAULT' no longer crashes `g77'.
-
- * The `-Wunused' option no longer issues a spurious warning about
- the "master" procedure generated by `g77' for procedures
- containing `ENTRY' statements.
-
- * Support `FORMAT(I<EXPR>)' when EXPR is a compile-time constant
- `INTEGER' expression.
-
- * Fix `g77' `-g' option so procedures that use `ENTRY' can be
- stepped through, line by line, in `gdb'.
-
- * Allow any `REAL' argument to intrinsics `Second' and `CPU_Time'.
-
- * Use `tempnam', if available, to open scratch files (as in
- `OPEN(STATUS='SCRATCH')') so that the `TMPDIR' environment
- variable, if present, is used.
-
- * `g77''s version of `libf2c' separates out the setting of global
- state (such as command-line arguments and signal handling) from
- `main.o' into distinct, new library archive members.
-
- This should make it easier to write portable applications that
- have their own (non-Fortran) `main()' routine properly set up the
- `libf2c' environment, even when `libf2c' (now `libg2c') is a
- shared library.
-
- * `g77' no longer installs the `f77' command and `f77.1' man page in
- the `/usr' or `/usr/local' hierarchy, even if the `f77-install-ok'
- file exists in the source or build directory. See the
- installation documentation for more information.
-
- * `g77' no longer installs the `libf2c.a' library and `f2c.h'
- include file in the `/usr' or `/usr/local' hierarchy, 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.
-
- * The `libf2c.a' library produced by `g77' has been renamed to
- `libg2c.a'. It is installed only in the `gcc' "private" directory
- hierarchy, `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.
-
- * The `f2c.h' include (header) file produced by `g77' has been
- renamed to `g2c.h'. It is installed only in the `gcc' "private"
- directory hierarchy, `gcc-lib'. This allows system administrators
- and users to choose which version of the include file from
- `netlib' they wish to use on a case-by-case basis. See the
- installation documentation for more information.
-
- * The `g77' command now expects the run-time library to be named
- `libg2c.a' instead of `libf2c.a', to ensure that a version other
- than the one built and installed as part of the same `g77' version
- is picked up.
-
- * 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.
-
- * `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
- prevent inadvertent use of the resulting, probably buggy, programs.
- These mostly include diagnostics about use of unsupported features
- in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and
- about truncations of various sorts of constants.
-
- * 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'.
-
- * Improve documentation and indexing.
-
- * 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:
-==================================
-
- * 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'.
-
- * `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.
-
- * Fix `g77' crash compiling code containing the construct
- `CMPLX(0.)' or similar.
-
- * `g77' no longer crashes when compiling code containing
- specification statements such as `INTEGER(KIND=7) PTR'.
-
- * `g77' no longer crashes when compiling code such as `J = SIGNAL(1,
- 2)'.
-
- * `g77' now treats `%LOC(EXPR)' and `LOC(EXPR)' as "ordinary"
- expressions when they are used as arguments in procedure calls.
- This change applies only to global (filewide) analysis, making it
- consistent with how `g77' actually generates code for these cases.
-
- Previously, `g77' treated these expressions as denoting special
- "pointer" arguments for the purposes of filewide analysis.
-
- * 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
- the generated code wants to link to the one in `libf2c' (`libg2c').
-
- * `g77' emits more debugging information when `-g' is used.
-
- This new information allows, for example, `which __g77_length_a'
- to be used in `gdb' to determine the type of the phantom length
- argument supplied with `CHARACTER' variables.
-
- This information pertains to internally-generated type, variable,
- and other information, not to the longstanding deficiencies
- vis-a-vis `COMMON' and `EQUIVALENCE'.
-
- * The F90 `Date_and_Time' intrinsic now is supported.
-
- * The F90 `System_Clock' intrinsic allows the optional arguments
- (except for the `Count' argument) to be omitted.
-
- * Upgrade to `libf2c' as of 1998-06-18.
-
- * Improve documentation and indexing.
-
-In 0.5.23 versus 0.5.22:
-========================
-
- * This release contains several regressions against version 0.5.22
- of `g77', due to using the "vanilla" `gcc' back end instead of
- patching it to fix a few bugs and improve performance in a few
- cases.
-
- Features that have been dropped from this version of `g77' due to
- their being implemented via `g77'-specific patches to the `gcc'
- back end in previous releases include:
-
- - Support for `__restrict__' keyword, the options
- `-fargument-alias', `-fargument-noalias', and
- `-fargument-noalias-global', and the corresponding
- alias-analysis code.
-
- (`egcs' has the alias-analysis code, but not the
- `__restrict__' keyword. `egcs' `g77' users benefit from the
- alias-analysis code despite the lack of the `__restrict__'
- keyword, which is a C-language construct.)
-
- - Support for the GNU compiler options `-fmove-all-movables',
- `-freduce-all-givs', and `-frerun-loop-opt'.
-
- (`egcs' supports these options. `g77' users of `egcs'
- benefit from them even if they are not explicitly specified,
- because the defaults are optimized for `g77' users.)
-
- - Support for the `-W' option warning about integer division by
- zero.
-
- - The Intel x86-specific option `-malign-double' applying to
- stack-allocated data as well as statically-allocate data.
-
- Note that the `gcc/f/gbe/' subdirectory has been removed from this
- distribution as a result of `g77' no longer including patches for
- the `gcc' back end.
-
- * 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.
-
- * Support `gcc' version 2.8, and remove support for prior versions
- of `gcc'.
-
- * Remove support for the `--driver' option, as `g77' now does all
- the driving, just like `gcc'.
-
- * `CASE DEFAULT' no longer crashes `g77'.
-
- * 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'.
-
- * `g77' no longer installs the `f77' command and `f77.1' man page in
- the `/usr' or `/usr/local' hierarchy, even if the `f77-install-ok'
- file exists in the source or build directory. See the
- installation documentation for more information.
-
- * `g77' no longer installs the `libf2c.a' library and `f2c.h'
- include file in the `/usr' or `/usr/local' hierarchy, 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.
-
- * The `libf2c.a' library produced by `g77' has been renamed to
- `libg2c.a'. It is installed only in the `gcc' "private" directory
- hierarchy, `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.
-
- * The `f2c.h' include (header) file produced by `g77' has been
- renamed to `g2c.h'. It is installed only in the `gcc' "private"
- directory hierarchy, `gcc-lib'. This allows system administrators
- and users to choose which version of the include file from
- `netlib' they wish to use on a case-by-case basis. See the
- installation documentation for more information.
-
- * The `g77' command now expects the run-time library to be named
- `libg2c.a' instead of `libf2c.a', to ensure that a version other
- than the one built and installed as part of the same `g77' version
- is picked up.
-
- * The `-Wunused' option no longer issues a spurious warning about
- the "master" procedure generated by `g77' for procedures
- containing `ENTRY' statements.
-
- * `g77''s version of `libf2c' separates out the setting of global
- state (such as command-line arguments and signal handling) from
- `main.o' into distinct, new library archive members.
-
- This should make it easier to write portable applications that
- have their own (non-Fortran) `main()' routine properly set up the
- `libf2c' environment, even when `libf2c' (now `libg2c') is a
- shared library.
-
- * During the configuration and build process, `g77' creates
- subdirectories it needs only as it needs them, thus avoiding
- unnecessary creation of, for example, `stage1/f/runtime' when
- doing a non-bootstrap build. Other cleaning up of the
- configuration and build process has been performed as well.
-
- * `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
- prevent inadvertent use of the resulting, probably buggy, programs.
- These mostly include diagnostics about use of unsupported features
- in the `OPEN', `INQUIRE', `READ', and `WRITE' statements, and
- about truncations of various sorts of constants.
-
- * Improve documentation and indexing.
-
- * Upgrade to `libf2c' as of 1998-04-20.
-
- This 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 0.5.22 versus 0.5.21:
-========================
-
- * Fix code generation for iterative `DO' loops that have one or more
- references to the iteration variable, or to aliases of it, in
- their control expressions. For example, `DO 10 J=2,J' now is
- compiled correctly.
-
- * 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'.
-
- * Fix `DTime' intrinsic so as not to truncate results to integer
- values (on some systems).
-
- * Fix `Signal' intrinsic so it offers portable support for 64-bit
- systems (such as Digital Alphas running GNU/Linux).
-
- * Fix run-time crash involving `NAMELIST' on 64-bit machines such as
- Alphas.
-
- * Fix `g77' version of `libf2c' so it no longer produces a spurious
- `I/O recursion' diagnostic at run time when an I/O operation (such
- as `READ *,I') is interrupted in a manner that causes the program
- to be terminated via the `f_exit' routine (such as via `C-c').
-
- * Fix `g77' crash triggered by `CASE' statement with an omitted
- lower or upper bound.
-
- * Fix `g77' crash compiling references to `CPU_Time' intrinsic.
-
- * Fix `g77' crash (or apparently infinite run-time) when compiling
- certain complicated expressions involving `COMPLEX' arithmetic
- (especially multiplication).
-
- * Fix `g77' crash on statements such as `PRINT *,
- (REAL(Z(I)),I=1,2)', where `Z' is `DOUBLE COMPLEX'.
-
- * Fix a `g++' crash.
-
- * Support `FORMAT(I<EXPR>)' when EXPR is a compile-time constant
- `INTEGER' expression.
-
- * Fix `g77' `-g' option so procedures that use `ENTRY' can be
- stepped through, line by line, in `gdb'.
-
- * Fix a profiling-related bug in `gcc' back end for Intel x86
- architecture.
-
- * Allow any `REAL' argument to intrinsics `Second' and `CPU_Time'.
-
- * Allow any numeric argument to intrinsics `Int2' and `Int8'.
-
- * Use `tempnam', if available, to open scratch files (as in
- `OPEN(STATUS='SCRATCH')') so that the `TMPDIR' environment
- variable, if present, is used.
-
- * Rename the `gcc' keyword `restrict' to `__restrict__', to avoid
- rejecting valid, existing, C programs. Support for `restrict' is
- now more like support for `complex'.
-
- * Fix `-fpedantic' to not reject procedure invocations such as
- `I=J()' and `CALL FOO()'.
-
- * Fix `-fugly-comma' to affect invocations of only external
- procedures. Restore rejection of gratuitous trailing omitted
- arguments to intrinsics, as in `I=MAX(3,4,,)'.
-
- * Fix compiler so it accepts `-fgnu-intrinsics-*' and
- `-fbadu77-intrinsics-*' options.
-
- * Improve diagnostic messages from `libf2c' so it is more likely
- that the printing of the active format string is limited to the
- string, with no trailing garbage being printed.
-
- (Unlike `f2c', `g77' did not append a null byte to its compiled
- form of every format string specified via a `FORMAT' statement.
- However, `f2c' would exhibit the problem anyway for a statement
- like `PRINT '(I)garbage', 1' by printing `(I)garbage' as the
- format string.)
-
- * 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'.
-
- * Fix various crashes involving code with diagnosed errors.
-
- * Fix cross-compilation bug when configuring `libf2c'.
-
- * Improve diagnostics.
-
- * Improve documentation and indexing.
-
- * Upgrade to `libf2c' as of 1997-09-23. This fixes a formatted-I/O
- bug that afflicted 64-bit systems with 32-bit integers (such as
- Digital Alpha running GNU/Linux).
-
-In `EGCS' 1.0.2 versus `EGCS' 1.0.1:
-====================================
-
- * Fix `g77' crash triggered by `CASE' statement with an omitted
- lower or upper bound.
-
- * Fix `g77' crash on statements such as `PRINT *,
- (REAL(Z(I)),I=1,2)', where `Z' is `DOUBLE COMPLEX'.
-
- * Fix `-fPIC' (such as compiling for ELF targets) on the Intel x86
- architecture target so invalid assembler code is no longer
- produced.
-
- * Fix `-fpedantic' to not reject procedure invocations such as
- `I=J()' and `CALL FOO()'.
-
- * Fix `-fugly-comma' to affect invocations of only external
- procedures. Restore rejection of gratuitous trailing omitted
- arguments to intrinsics, as in `I=MAX(3,4,,)'.
-
- * Fix compiler so it accepts `-fgnu-intrinsics-*' and
- `-fbadu77-intrinsics-*' options.
-
-In `EGCS' 1.0.1 versus `EGCS' 1.0:
-==================================
-
- * Fix run-time crash involving `NAMELIST' on 64-bit machines such as
- Alphas.
-
-In `EGCS' 1.0 versus `g77' 0.5.21:
-==================================
-
- * Version 1.0 of `egcs' contains several regressions against version
- 0.5.21 of `g77', due to using the "vanilla" `gcc' back end instead
- of patching it to fix a few bugs and improve performance in a few
- cases.
-
- Features that have been dropped from this version of `g77' due to
- their being implemented via `g77'-specific patches to the `gcc'
- back end in previous releases include:
-
- - Support for the C-language `restrict' keyword.
-
- - Support for the `-W' option warning about integer division by
- zero.
-
- - The Intel x86-specific option `-malign-double' applying to
- stack-allocated data as well as statically-allocate data.
-
- Note that the `gcc/f/gbe/' subdirectory has been removed from this
- distribution as a result of `g77' being fully integrated with the
- `egcs' variant of the `gcc' back end.
-
- * Fix code generation for iterative `DO' loops that have one or more
- references to the iteration variable, or to aliases of it, in
- their control expressions. For example, `DO 10 J=2,J' now is
- compiled correctly.
-
- * Fix `DTime' intrinsic so as not to truncate results to integer
- values (on some systems).
-
- * Some Fortran code, miscompiled by `g77' built on `gcc' version
- 2.8.1 on m68k-next-nextstep3 configurations when using the `-O2'
- option, is now compiled correctly. It is believed that a C
- function known to miscompile on that configuration when using the
- `-O2 -funroll-loops' options also is now compiled correctly.
-
- * Remove support for non-`egcs' versions of `gcc'.
-
- * Remove support for the `--driver' option, as `g77' now does all
- the driving, just like `gcc'.
-
- * Allow any numeric argument to intrinsics `Int2' and `Int8'.
-
- * Improve diagnostic messages from `libf2c' so it is more likely
- that the printing of the active format string is limited to the
- string, with no trailing garbage being printed.
-
- (Unlike `f2c', `g77' did not append a null byte to its compiled
- form of every format string specified via a `FORMAT' statement.
- However, `f2c' would exhibit the problem anyway for a statement
- like `PRINT '(I)garbage', 1' by printing `(I)garbage' as the
- format string.)
-
- * Upgrade to `libf2c' as of 1997-09-23. This fixes a formatted-I/O
- bug that afflicted 64-bit systems with 32-bit integers (such as
- Digital Alpha running GNU/Linux).
-
-In 0.5.21:
-==========
-
- * Fix a code-generation bug introduced by 0.5.20 caused by loop
- unrolling (by specifying `-funroll-loops' or similar). This bug
- afflicted all code compiled by version 2.7.2.2.f.2 of `gcc' (C,
- C++, Fortran, and so on).
-
- * Fix a code-generation bug manifested when combining local
- `EQUIVALENCE' with a `DATA' statement that follows the first
- executable statement (or is treated as an executable-context
- statement as a result of using the `-fpedantic' option).
-
- * Fix a compiler crash that occurred when an integer division by a
- constant zero is detected. Instead, when the `-W' option is
- specified, the `gcc' back end issues a warning about such a case.
- This bug afflicted all code compiled by version 2.7.2.2.f.2 of
- `gcc' (C, C++, Fortran, and so on).
-
- * Fix a compiler crash that occurred in some cases of procedure
- inlining. (Such cases became more frequent in 0.5.20.)
-
- * Fix a compiler crash resulting from using `DATA' or similar to
- initialize a `COMPLEX' variable or array to zero.
-
- * Fix compiler crashes involving use of `AND', `OR', or `XOR'
- intrinsics.
-
- * Fix compiler bug triggered when using a `COMMON' or `EQUIVALENCE'
- variable as the target of an `ASSIGN' or assigned-`GOTO' statement.
-
- * Fix compiler crashes due to using the name of a some non-standard
- intrinsics (such as `FTell' or `FPutC') as such and as the name of
- a procedure or common block. Such dual use of a name in a program
- is allowed by the standard.
-
- * Place automatic arrays on the stack, even if `SAVE' or the
- `-fno-automatic' option is in effect. This avoids a compiler
- crash in some cases.
-
- * The `-malign-double' option now reliably aligns `DOUBLE PRECISION'
- optimally on Pentium and Pentium Pro architectures (586 and 686 in
- `gcc').
-
- * New option `-Wno-globals' disables warnings about "suspicious" use
- of a name both as a global name and as the implicit name of an
- intrinsic, and warnings about disagreements over the number or
- natures of arguments passed to global procedures, or the natures
- of the procedures themselves.
-
- The default is to issue such warnings, which are new as of this
- version of `g77'.
-
- * New option `-fno-globals' disables diagnostics about potentially
- fatal disagreements analysis problems, such as disagreements over
- the number or natures of arguments passed to global procedures, or
- the natures of those procedures themselves.
-
- The default is to issue such diagnostics and flag the compilation
- as unsuccessful. With this option, the diagnostics are issued as
- warnings, or, if `-Wno-globals' is specified, are not issued at
- all.
-
- This option also disables inlining of global procedures, to avoid
- compiler crashes resulting from coding errors that these
- diagnostics normally would identify.
-
- * Diagnose cases where a reference to a procedure disagrees with the
- type of that procedure, or where disagreements about the number or
- nature of arguments exist. This avoids a compiler crash.
-
- * Fix parsing bug whereby `g77' rejected a second initialization
- specification immediately following the first's closing `/' without
- an intervening comma in a `DATA' statement, and the second
- specification was an implied-DO list.
-
- * Improve performance of the `gcc' back end so certain complicated
- expressions involving `COMPLEX' arithmetic (especially
- multiplication) don't appear to take forever to compile.
-
- * Fix a couple of profiling-related bugs in `gcc' back end.
-
- * Integrate GNU Ada's (GNAT's) changes to the back end, which
- consist almost entirely of bug fixes. These fixes are circa
- version 3.10p of GNAT.
-
- * Include some other `gcc' fixes that seem useful in `g77''s version
- of `gcc'. (See `gcc/ChangeLog' for details--compare it to that
- file in the vanilla `gcc-2.7.2.3.tar.gz' distribution.)
-
- * Fix `libU77' routines that accept file and other names to strip
- trailing blanks from them, for consistency with other
- implementations. Blanks may be forcibly appended to such names by
- appending a single null character (`CHAR(0)') to the significant
- trailing blanks.
-
- * Fix `CHMOD' intrinsic to work with file names that have embedded
- blanks, commas, and so on.
-
- * Fix `SIGNAL' intrinsic so it accepts an optional third `Status'
- argument.
-
- * Fix `IDATE()' intrinsic subroutine (VXT form) so it accepts
- arguments in the correct order. Documentation fixed accordingly,
- and for `GMTIME()' and `LTIME()' as well.
-
- * Make many changes to `libU77' intrinsics to support existing code
- more directly.
-
- Such changes include allowing both subroutine and function forms
- of many routines, changing `MCLOCK()' and `TIME()' to return
- `INTEGER(KIND=1)' values, introducing `MCLOCK8()' and `TIME8()' to
- return `INTEGER(KIND=2)' values, and placing functions that are
- intended to perform side effects in a new intrinsic group,
- `badu77'.
-
- * Improve `libU77' so it is more portable.
-
- * Add options `-fbadu77-intrinsics-delete',
- `-fbadu77-intrinsics-hide', and so on.
-
- * Fix crashes involving diagnosed or invalid code.
-
- * `g77' and `gcc' now do a somewhat better job detecting and
- diagnosing arrays that are too large to handle before these cause
- diagnostics during the assembler or linker phase, a compiler
- crash, or generation of incorrect code.
-
- * Make some fixes to alias analysis code.
-
- * Add support for `restrict' keyword in `gcc' front end.
-
- * Support `gcc' version 2.7.2.3 (modified by `g77' into version
- 2.7.2.3.f.1), and remove support for prior versions of `gcc'.
-
- * Incorporate GNAT's patches to the `gcc' back end into `g77''s, so
- GNAT users do not need to apply GNAT's patches to build both GNAT
- and `g77' from the same source tree.
-
- * Modify `make' rules and related code so that generation of Info
- documentation doesn't require compilation using `gcc'. Now, any
- ANSI C compiler should be adequate to produce the `g77'
- documentation (in particular, the tables of intrinsics) from
- scratch.
-
- * Add `INT2' and `INT8' intrinsics.
-
- * Add `CPU_TIME' intrinsic.
-
- * Add `ALARM' intrinsic.
-
- * `CTIME' intrinsic now accepts any `INTEGER' argument, not just
- `INTEGER(KIND=2)'.
-
- * Warn when explicit type declaration disagrees with the type of an
- intrinsic invocation.
-
- * Support `*f771' entry in `gcc' `specs' file.
-
- * Fix typo in `make' rule `g77-cross', used only for cross-compiling.
-
- * Fix `libf2c' build procedure to re-archive library if previous
- attempt to archive was interrupted.
-
- * Change `gcc' to unroll loops only during the last invocation (of
- as many as two invocations) of loop optimization.
-
- * Improve handling of `-fno-f2c' so that code that attempts to pass
- an intrinsic as an actual argument, such as `CALL FOO(ABS)', is
- rejected due to the fact that the run-time-library routine is,
- effectively, compiled with `-ff2c' in effect.
-
- * Fix `g77' driver to recognize `-fsyntax-only' as an option that
- inhibits linking, just like `-c' or `-S', and to recognize and
- properly handle the `-nostdlib', `-M', `-MM', `-nodefaultlibs',
- and `-Xlinker' options.
-
- * Upgrade to `libf2c' as of 1997-08-16.
-
- * Modify `libf2c' to consistently and clearly diagnose recursive I/O
- (at run time).
-
- * `g77' driver now prints version information (such as produced by
- `g77 -v') to `stderr' instead of `stdout'.
-
- * The `.r' suffix now designates a Ratfor source file, to be
- preprocessed via the `ratfor' command, available separately.
-
- * Fix some aspects of how `gcc' determines what kind of system is
- being configured and what kinds are supported. For example, GNU
- Linux/Alpha ELF systems now are directly supported.
-
- * Improve diagnostics.
-
- * Improve documentation and indexing.
-
- * Include all pertinent files for `libf2c' that come from
- `netlib.bell-labs.com'; give any such files that aren't quite
- accurate in `g77''s version of `libf2c' the suffix `.netlib'.
-
- * Reserve `INTEGER(KIND=0)' for future use.
-
-In 0.5.20:
-==========
-
- * The `-fno-typeless-boz' option is now the default.
-
- This option specifies that non-decimal-radix constants using the
- prefixed-radix form (such as `Z'1234'') are to be interpreted as
- `INTEGER(KIND=1)' constants. Specify `-ftypeless-boz' to cause
- such constants to be interpreted as typeless.
-
- (Version 0.5.19 introduced `-fno-typeless-boz' and its inverse.)
-
- *Note Options Controlling Fortran Dialect: Fortran Dialect Options,
- for information on the `-ftypeless-boz' option.
-
- * Options `-ff90-intrinsics-enable' and `-fvxt-intrinsics-enable'
- now are the defaults.
-
- Some programs might use names that clash with intrinsic names
- defined (and now enabled) by these options or by the new `libU77'
- intrinsics. Users of such programs might need to compile them
- differently (using, for example, `-ff90-intrinsics-disable') or,
- better yet, insert appropriate `EXTERNAL' statements specifying
- that these names are not intended to be names of intrinsics.
-
- * The `ALWAYS_FLUSH' macro is no longer defined when building
- `libf2c', which should result in improved I/O performance,
- especially over NFS.
-
- _Note:_ If you have code that depends on the behavior of `libf2c'
- when built with `ALWAYS_FLUSH' defined, you will have to modify
- `libf2c' accordingly before building it from this and future
- versions of `g77'.
-
- *Note Output Assumed To Flush::, for more information.
-
- * Dave Love's implementation of `libU77' has been added to the
- version of `libf2c' distributed with and built as part of `g77'.
- `g77' now knows about the routines in this library as intrinsics.
-
- * New option `-fvxt' specifies that the source file is written in
- VXT Fortran, instead of GNU Fortran.
-
- *Note VXT Fortran::, for more information on the constructs
- recognized when the `-fvxt' option is specified.
-
- * The `-fvxt-not-f90' option has been deleted, along with its
- inverse, `-ff90-not-vxt'.
-
- If you used one of these deleted options, you should re-read the
- pertinent documentation to determine which options, if any, are
- appropriate for compiling your code with this version of `g77'.
-
- *Note Other Dialects::, for more information.
-
- * The `-fugly' option now issues a warning, as it likely will be
- removed in a future version.
-
- (Enabling all the `-fugly-*' options is unlikely to be feasible,
- or sensible, in the future, so users should learn to specify only
- those `-fugly-*' options they really need for a particular source
- file.)
-
- * The `-fugly-assumed' option, introduced in version 0.5.19, has
- been changed to better accommodate old and new code.
-
- *Note Ugly Assumed-Size Arrays::, for more information.
-
- * Make a number of fixes to the `g77' front end and the `gcc' back
- end to better support Alpha (AXP) machines. This includes
- providing at least one bug-fix to the `gcc' back end for Alphas.
-
- * Related to supporting Alpha (AXP) machines, the `LOC()' intrinsic
- and `%LOC()' construct now return values of `INTEGER(KIND=0)' type,
- as defined by the GNU Fortran language.
-
- This type is wide enough (holds the same number of bits) as the
- character-pointer type on the machine.
-
- On most machines, this won't make a difference, whereas, on Alphas
- and other systems with 64-bit pointers, the `INTEGER(KIND=0)' type
- is equivalent to `INTEGER(KIND=2)' (often referred to as
- `INTEGER*8') instead of the more common `INTEGER(KIND=1)' (often
- referred to as `INTEGER*4').
-
- * Emulate `COMPLEX' arithmetic in the `g77' front end, to avoid bugs
- in `complex' support in the `gcc' back end. New option
- `-fno-emulate-complex' causes `g77' to revert the 0.5.19 behavior.
-
- * Fix bug whereby `REAL A(1)', for example, caused a compiler crash
- if `-fugly-assumed' was in effect and A was a local (automatic)
- array. That case is no longer affected by the new handling of
- `-fugly-assumed'.
-
- * Fix `g77' command driver so that `g77 -o foo.f' no longer deletes
- `foo.f' before issuing other diagnostics, and so the `-x' option
- is properly handled.
-
- * Enable inlining of subroutines and functions by the `gcc' back end.
- This works as it does for `gcc' itself--program units may be
- inlined for invocations that follow them in the same program unit,
- as long as the appropriate compile-time options are specified.
-
- * Dummy arguments are no longer assumed to potentially alias
- (overlap) other dummy arguments or `COMMON' areas when any of
- these are defined (assigned to) by Fortran code.
-
- This can result in faster and/or smaller programs when compiling
- with optimization enabled, though on some systems this effect is
- observed only when `-fforce-addr' also is specified.
-
- New options `-falias-check', `-fargument-alias',
- `-fargument-noalias', and `-fno-argument-noalias-global' control
- the way `g77' handles potential aliasing.
-
- *Note Aliasing Assumed To Work::, for detailed information on why
- the new defaults might result in some programs no longer working
- the way they did when compiled by previous versions of `g77'.
-
- * The `CONJG()' and `DCONJG()' intrinsics now are compiled in-line.
-
- * The bug-fix for 0.5.19.1 has been re-done. The `g77' compiler has
- been changed back to assume `libf2c' has no aliasing problems in
- its implementations of the `COMPLEX' (and `DOUBLE COMPLEX')
- intrinsics. The `libf2c' has been changed to have no such
- problems.
-
- As a result, 0.5.20 is expected to offer improved performance over
- 0.5.19.1, perhaps as good as 0.5.19 in most or all cases, due to
- this change alone.
-
- _Note:_ This change requires version 0.5.20 of `libf2c', at least,
- when linking code produced by any versions of `g77' other than
- 0.5.19.1. Use `g77 -v' to determine the version numbers of the
- `libF77', `libI77', and `libU77' components of the `libf2c'
- library. (If these version numbers are not printed--in
- particular, if the linker complains about unresolved references to
- names like `g77__fvers__'--that strongly suggests your
- installation has an obsolete version of `libf2c'.)
-
- * New option `-fugly-assign' specifies that the same memory
- locations are to be used to hold the values assigned by both
- statements `I = 3' and `ASSIGN 10 TO I', for example. (Normally,
- `g77' uses a separate memory location to hold assigned statement
- labels.)
-
- *Note Ugly Assigned Labels::, for more information.
-
- * `FORMAT' and `ENTRY' statements now are allowed to precede
- `IMPLICIT NONE' statements.
-
- * Produce diagnostic for unsupported `SELECT CASE' on `CHARACTER'
- type, instead of crashing, at compile time.
-
- * Fix crashes involving diagnosed or invalid code.
-
- * Change approach to building `libf2c' archive (`libf2c.a') so that
- members are added to it only when truly necessary, so the user
- that installs an already-built `g77' doesn't need to have write
- access to the build tree (whereas the user doing the build might
- not have access to install new software on the system).
-
- * Support `gcc' version 2.7.2.2 (modified by `g77' into version
- 2.7.2.2.f.2), and remove support for prior versions of `gcc'.
-
- * Upgrade to `libf2c' as of 1997-02-08, and fix up some of the build
- procedures.
-
- * Improve general build procedures for `g77', fixing minor bugs
- (such as deletion of any file named `f771' in the parent directory
- of `gcc/').
-
- * Enable full support of `INTEGER(KIND=2)' (often referred to as
- `INTEGER*8') available in `libf2c' and `f2c.h' so that `f2c' users
- may make full use of its features via the `g77' version of `f2c.h'
- and the `INTEGER(KIND=2)' support routines in the `g77' version of
- `libf2c'.
-
- * Improve `g77' driver and `libf2c' so that `g77 -v' yields version
- information on the library.
-
- * The `SNGL' and `FLOAT' intrinsics now are specific intrinsics,
- instead of synonyms for the generic intrinsic `REAL'.
-
- * New intrinsics have been added. These are `REALPART', `IMAGPART',
- `COMPLEX', `LONG', and `SHORT'.
-
- * A new group of intrinsics, `gnu', has been added to contain the
- new `REALPART', `IMAGPART', and `COMPLEX' intrinsics. An old
- group, `dcp', has been removed.
-
- * Complain about industry-wide ambiguous references `REAL(EXPR)' and
- `AIMAG(EXPR)', where EXPR is `DOUBLE COMPLEX' (or any complex type
- other than `COMPLEX'), unless `-ff90' option specifies Fortran 90
- interpretation or new `-fugly-complex' option, in conjunction with
- `-fnot-f90', specifies `f2c' interpretation.
-
- * Make improvements to diagnostics.
-
- * Speed up compiler a bit.
-
- * Improvements to documentation and indexing, including a new
- chapter containing information on one, later more, diagnostics
- that users are directed to pull up automatically via a message in
- the diagnostic itself.
-
- (Hence the menu item `M' for the node `Diagnostics' in the
- top-level menu of the Info documentation.)
-
-In previous versions:
-=====================
-
- Information on previous versions is archived in `gcc/gcc/f/news.texi'
-following the test of the `DOC-OLDNEWS' macro.
-
projects / msp430-gcc.git / blobdiff