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

If you are familiar with other compilers, particularly those in the XL family of
compilers, you may already be familiar with many of these flags.
You can also specify many command-line options in a form that is intended to be
easy to remember and make compilation scripts and makefiles relatively
self-explanatory:
►►
-q option_keyword
:
►◄
= ▼ suboption
,
= ▼ argument
This format is more restrictive about the placement of blanks; you must separate
individual -q options by blanks, and there must be no blank between a -q option
and a following argument string. Unlike the names of flag options, -q option
names are not case-sensitive except that the q must be lowercase. Use an equal
sign to separate a -q option from any arguments it requires, and use colons to
separate suboptions within the argument string.
For example:
xlf95 -qddim -qXREF=full -qfloat=nomaf:rsqrt -O3 -qcache=type=c:level=1 file.f
Specifying Options in the Source File
By putting the @PROCESS compiler directive in the source file, you can specify
compiler options to affect an individual compilation unit. The @PROCESS
compiler directive can override options specified in the configuration file, in the
default settings, or on the command line.
,
►►
@PROCESS
▼
option
( suboption_list )
►◄
option
is the name of a compiler option without the -q.
suboption
is a suboption of a compiler option.
In fixed source form, @PROCESS can start in column 1 or after column 6. In free
source form, the @PROCESS compiler directive can start in any column.
You cannot place a statement label or inline comment on the same line as an
@PROCESS compiler directive.
By default, option settings you designate with the @PROCESS compiler directive
are effective only for the compilation unit in which the statement appears. If the
file has more than one compilation unit, the option setting is reset to its original
state before the next unit is compiled. Trigger constants specified by the
DIRECTIVE option are in effect until the end of the file (or until NODIRECTIVE
is processed).
Editing, Compiling, Linking, and Running XL Fortran Programs 37