[Bug fortran/32021] New: Fix,document,remove GFORTRAN_* environment variables

[Bug fortran/32021] New: Fix,document,remove GFORTRAN_* environment variables

[burnus at gcc dot gnu dot org]

The following environment variables exist in gfortran (inherited from g95, cf.
http://ftp.g95.org/G95Manual.pdf). They are not documented and don't seem to
work, however they are partially implemented.

GFORTRAN_FPU_PRECISION can probably be removed (cf. -mpc32, -mpc64  and -mpc80)
GFORTRAN_MEM_INIT sounds something which should be handled by the front end (w/
a flag) for speed reasons. (cf. -finit-local-zero, PR20441).
Similar for GFORTRAN_MEM_CHECK.

GFORTRAN_SIG* could be implemented, if someone needs it. (can be done via the
signal vendor intrinsic).

GFORTRAN_FPU_ROUND etc. could be handled by the Fortran 2003 IEEE rounding
modes - or is this environment variable needed?

--- gfortran.texi       (Revision 124895)
+++ gfortran.texi       (Arbeitskopie)
@@ -604,6 +612,51 @@
 when @command{a.out} is the compiled Fortran program that you want to run.
 Default is a single space.

+@node GFORTRAN_MEM_INIT
+@section @env{GFORTRAN_MEM_INIT}---Default initialization of allocated memory
+
+This environment variable specifies how allocated memory is initialized.
+Default value is @samp{NONE} for no initialization (faster); other options
+are @samp{NAN} for not-a-number with mantissa @samp{0x40f95} or
+a custom hexadecimal value.
+
+@node GFORTRAN_MEM_CHECK
+@section @env{GFORTRAN_MEM_CHECK}---Default initialization of allocated memory
+
+If the first letter is @samp{y}, @samp{Y} or @samp{1}, memory which is still
+allocated when the program ends is reported; it is not reported if the first
+letter is @samp{n}, @samp{N} or @samp{0}. Default is not to report.
+
+@node GFORTRAN_SIGHUP
+@section @env{GFORTRAN_SIGHUP}---Behavior on SIGHUP
+
+When the @env{GFORTRAN_SIGHUP} variable is set to @samp{IGNORE}, the signal
+SIGHUP is ignored. It it is set to @samp{ABORT}, the program aborts.
+Default is to abort.
+
+@node GFORTRAN_SIGINT
+@section @env{GFORTRAN_SIGINT}---Behavior on SIGINT
+
+When the @env{GFORTRAN_SIGINT} variable is set to @samp{IGNORE}, the signal
+SIGINT is ignored. It it is set to @samp{ABORT}, the program aborts.
+Default is to abort.
+
+@node GFORTRAN_FPU_ROUND
+@section @env{GFORTRAN_FPU_ROUND}---Floating point rounding
+
+The @env{GFORTRAN_FPU_ROUND} variable specifies the floating point
+rounding. Possible values are: to round to the @samp{NEAREST}
+integer, to always round @samp{UP}, to always round @samp{DOWN},
+or to round always towards @samp{ZERO}. Default is to round
+to the nearest integer.
+
+@node GFORTRAN_FPU_PRECISION
+@section @env{GFORTRAN_FPU_PRECISION}---Precision of intermediate results
+
+The @env{GFORTRAN_FPU_PRECISION} variable specifies the precision
+of intermediate results. Possible values are
+@samp{24}, @samp{53} and @samp{64}. Default is @samp{64}.
+
 @node GFORTRAN_CONVERT_UNIT
 @section @env{GFORTRAN_CONVERT_UNIT}---Set endianness for unformatted I/O


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           Summary: Fix,document,remove GFORTRAN_* environment variables
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: burnus at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[burnus at gcc dot gnu dot org]

------- Comment #1 from burnus at gcc dot gnu dot org  2007-05-21 14:29 -------
For GFORTRAN_SIG* one could also add an option to backtrace/dump in this case.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[fxcoudert at gcc dot gnu dot org]

-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-05-22 12:25:40
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[fxcoudert at gcc dot gnu dot org]

-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |fxcoudert at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2007-05-22 12:25:40         |2007-10-02 12:07:39
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[fxcoudert at gcc dot gnu dot org]

------- Comment #2 from fxcoudert at gcc dot gnu dot org  2007-10-04 15:18 -------
Subject: Bug 32021

Author: fxcoudert
Date: Thu Oct  4 15:18:48 2007
New Revision: 129014

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129014
Log:
        PR libfortran/32021

        * runtime/environ.c (init_mem, show_mem, init_round, show_round,
        init_precision, show_precision, init_signal, show_signal): Remove.
        (variable_table): Remove GFORTRAN_MEM_INIT, GFORTRAN_MEM_CHECK,
        GFORTRAN_SIGHUP, GFORTRAN_SIGINT, GFORTRAN_FPU_ROUND and
        GFORTRAN_FPU_PRECISION.
        * libgfortran.h (options_t): Remove mem_check, fpu_round,
        fpu_precision, sighup, sigint, allocate_init_flag and
        allocate_init_value.

Modified:
    trunk/libgfortran/ChangeLog
    trunk/libgfortran/libgfortran.h
    trunk/libgfortran/runtime/environ.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[fxcoudert at gcc dot gnu dot org]

------- Comment #3 from fxcoudert at gcc dot gnu dot org  2007-10-04 15:19 -------
Fixed.


-- 

fxcoudert at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021

[Bug fortran/32021] Fix,document,remove GFORTRAN_* environment variables

[fxcoudert at gcc dot gnu dot org]

------- Comment #4 from fxcoudert at gcc dot gnu dot org  2007-10-18 21:25 -------
Subject: Bug 32021

Author: fxcoudert
Date: Thu Oct 18 21:25:21 2007
New Revision: 129463

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=129463
Log:
        PR libfortran/32021
        * runtime/backtrace.c (local_strcasestr): Protect by appropriate
        macros.
        * runtime/main.c (cleanup): Cast argument to free.
        * intrinsics/spread_generic.c (spread_internal): Match runtime_error
        arguments and format.
        * intrinsics/signal.c (alarm_sub_int_i4, alarm_sub_int_i8): Cast
        pointers to avoid warnings.

Modified:
    trunk/libgfortran/ChangeLog
    trunk/libgfortran/intrinsics/signal.c
    trunk/libgfortran/intrinsics/spread_generic.c
    trunk/libgfortran/runtime/backtrace.c
    trunk/libgfortran/runtime/main.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32021