Intel® Fortran Compiler 17.0 Developer Guide and Reference
This section describes general rules for compiler options and it contains information about how we refer to compiler option names in descriptions.
You cannot combine options with a single dash (Linux* and OS X*) or slash (Windows*). For example:
On Linux* and OS X* systems: This is incorrect: -wc; this is correct: -w -c
On Windows* systems: This is incorrect: /wc; this is correct: /w /c
All Linux* and OS X* compiler options are case sensitive. Many Windows* options are case sensitive. Some options have different meanings depending on their case; for example, option "c" prevents linking, but option "C" checks for certain conditions at run time.
Options specified on the command line apply to all files named on the command line.
Options can take arguments in the form of file names, strings, letters, or numbers. If a string includes spaces, the string must be enclosed in quotation marks. For example:
On Linux* and OS X* systems, -dynamic-linker mylink (file name) or -Umacro3 (string)
On Windows* systems, /Famyfile.s (file name) or /V"version 5.0" (string)
Compiler options can appear in any order.
On Windows* systems, all compiler options must precede /link options, if any, on the command line.
Unless you specify certain options, the command line will both compile and link the files you specify.
You can abbreviate some option names, entering as many characters as are needed to uniquely identify the option.
Certain options accept one or more keyword arguments following the option name. For example, the arch option accepts several keywords.
To specify multiple keywords, you typically specify the option multiple times. However, there are exceptions; for example, the following are valid: -axNB (Linux*) or /QaxNB (Windows*).
On Windows* systems, you can sometimes use a
comma to separate keywords. For example, the following is valid:
ifort /warn:usage,declarations test.f90
ifort /warn=usage,declarations test.f90
Compiler options remain in effect for the whole compilation unless overridden by a compiler directive.
To disable an option, specify the negative form of the option.
On Windows* systems, you can also disable one or more optimization options by specifying option /Od last on the command line.
On Windows* systems, the /Od option is part of a mutually-exclusive group of options that includes /Od, /O1, /O2, /O3, and /Ox. The last of any of these options specified on the command line will override the previous options from this group.
If there are enabling and disabling versions of an option on the command line, the last one on the command line takes precedence.
The following conventions are used as shortcuts when referencing compiler option names in descriptions:
Many options have names that are the same on Linux*, OS X*, and Windows*, except that the Windows form starts with an initial / and the Linux and OS X form starts with an initial -. Within text, such option names are shown without the initial character; for example, check.
Many options have names that are the same on Linux*, OS X*, and Windows*, except that the Windows form starts with an initial Q. Within text, such option names are shown as [Q]option-name.
For example, if you see a reference to [Q]ip, the Linux* and OS X* form of the option is -ip and the Windows form of the option is /Qip.
Several compiler options have similar names except that the Linux* and OS X* forms start with an initial q and the Windows form starts with an initial Q. Within text, such option names are shown as [q or Q]option-name.
For example, if you see a reference to [q or Q]opt-report, the Linux* and OS X* form of the option is -qopt-report and the Windows form of the option is /Qopt-report.
Compiler option names that are more dissimilar are shown in full.