XL Fortran Enterprise Edition for AIX : User's Guide - IBM

-qposition Option
Syntax
-qposition={appendold | appendunknown} ...
POSITION({APPENDOLD | APPENDUNKNOWN} ...)
Positions the file pointer at the end of the file when data is written after an OPEN
statement with no POSITION= specifier and the corresponding STATUS= value
(OLD or UNKNOWN) is specified.
Rules
The position becomes APPEND when the first I/O operation moves the file
pointer if that I/O operation is a WRITE or PRINT statement. If it is a
BACKSPACE, ENDFILE, READ, or REWIND statement instead, the position is
REWIND.
Applicable Product Levels
The appendunknown suboption is the same as the XL Fortran Version 2 append
suboption, but we recommend using appendunknown to avoid ambiguity.
-qposition=appendold:appendunknown provides compatibility with XL Fortran
Version 1 and early Version 2 behavior. -qposition=appendold provides
compatibility with XL Fortran Version 2.3 behavior.
Examples
In the following example, OPEN statements that do not specify a POSITION=
specifier, but specify STATUS=’old’ will open the file as if POSITION=’append’
was specified.
xlf95 -qposition=appendold opens_old_files.f
In the following example, OPEN statements that do not specify a POSITION=
specifier, but specify STATUS=’unknown’ will open the file as if
POSITION=’append’ was specified.
xlf95 -qposition=appendunknown opens_unknown_files.f
In the following example, OPEN statements that do not specify a POSITION=
specifier, but specify either STATUS=’old’ or STATUS=’unknown’ will open the
file as if POSITION=’append’ was specified.
xlf95 -qposition=appendold:appendunknown opens_many_files.f
Related Information
See “File Positioning” on page 327 and the section on the OPEN statement in the
XL Fortran Enterprise Edition for AIX Language Reference.
XL Fortran Compiler-Option Reference 219