Compiler options on a command line
FTN95 is a command line compiler and so can be invoked from a Command Prompt
The compiler reads programs from text files that have been created using a
suitable ASCII text editor (like that included in Visual Studio). The text file
can be specified as the first parameter to the FTN95 command as follows:
FTN95 <pathname> /CLR
Note that options may be abbreviated, but care should be exercised to ensure
that the abbreviated form is unique.
When the /CLR switch is used the compiler makes .DBK files for .NET rather than
Win32 .OBJ files. When <pathname> does not include an extension, the
compiler searches for the file <pathname>.F95 (or .F90). Source files
must have .F95 or .F90 as an extension, or be specified with an explicit
extension. Any file name acceptable to the operating system can be used.
By default, files that have a .F95 or .F90 extension are assumed to be free
format files whilst files that have a .FOR or .F extension are assumed to be
fixed format files.
FTN95 MYPROG /CLR
compiles the program in the file MYPROG.F95 which is in the current
FTN95 C:\FTN\PROJECT\MYPROG /CLR
compiles the file MYPROG.F95 in the directory C:\FTN\PROJECT\.
Only one source file name may be specified unless wildcards are used. For
FTN95 *.F95 /CLR
would compile all of the .F95 files in the current directory. In this case an
explicit extension (like .F95) is essential.
If the program is contained within a single file it can linked to form a .NET
executable by using /LINK.
FTN95 MYPROG /CLR /LINK
When /CLR is not present /LINK is used to create a Win32 executable.
The /LINK option can also used to create a .NET DLL file or a .NET module
(not to be confused with a Fortran module). For a Win32 platform (when /CLR is
not present), /LINK can also be used to create a DLL or library.
For single program files there is also a load-and-go option:
FTN95 MYPROG /CLR /LGO
This compiles, links and loads the program without creating permanent object and
If your project uses a number of source files, then each file must be separately
compiled using a command of the form:
FTN95 MYPROG /CLR
The resulting set of .DBK files are then linked together using the Salord
linker DBK_LINK or
DBK_LINK2 or DBK_LINK4. If /CLR is not used, the resulting set of .OBJ files are
linked together using the Silverfrost linker
FTN95 for Microsoft .NET does not have an independent debugger so you must use
Visual Studio in order to step into the code for debugging purposes. FTN95 for
Win32 uses either the independent debugger
SDBG or can use the debugger inside Visual Studio.
Some of the compiler command line options can be adopted as compiler defaults.
The default options can be listed and changed from an interactive dialog that
is opened with the following command:
Many of the options have a corresponding opposite. For example /-INTL is the
opposite of /INTL. If the default setting is changed by using the /CONFIG
dialog, then there are occasions when you may wish to use the opposite option
in order to temporarily restore the original default. The dialog indicates
which options can be configured and hence have an opposite.