fpp

fpp-name

The fpp-name Lets you specify an alternate preprocessor to use with Fortran.

Syntax


Linux	-fpp-name=name
macOS	-fpp-name=name
Windows	/fpp-name:name

Arguments name Is the name of the preprocessor executable. It can include a path. See the description below for more details.

Default OFF No preprocessor is run on files before compilation.

Description This option lets you specify an alternate preprocessor to use with Fortran.

The compiler invokes the user-specified Fortran preprocessor by spawning a command with the following signature:

alt_fpp @fpp.arg

where alt_fpp is the name of the Fortran preprocessor you want to use, and fpp.arg is an input file containing the preprocessor's command line arguments.

fpp.arg is generated by the Fortran compiler driver, and contains the -D<define>, -I<include directory>, and input file names from the compiler command line. Compiler predefined options -D<define> and -I<include directory> are also included. Output from the preprocessor goes to STDOUT and will be captured for any further processing.

You can use option Qoption,fpp,… to pass other definitions (using -D<define>), include directories (using -I<include directory>), or other options accepted by the preprocessor.

You can use option Qlocation, fpp,… to specify a directory for supporting tools.

Known issues

link

‍The Intel compilers provide a flag -fpp-name=<name> which can be used to specify an alternative preprocessor of the form:

alt_fpp [ [–D<define>]..] [[-I<include directory>]..] inputfile which prints output to STDOUT that will get captured by the compiler for further processing.

I've tried to use this with fypp, but I run into errors:
$ ifx -fpp-name=`which fypp` -DNAME=\"Ivan\" fypp_example.F90

error: Failed to open file '@/tmp/ifxargBf8BjW' for read [FyppFatalError]

error: [Errno 2] No such file or directory: '@/tmp/ifxargBf8BjW' [FileNotFoundError]

$ ifx -fpp-name=fypp -Qlocation,fpp,/home/ivan/.local/bin -DNAME=\"Ivan\" fypp_example.F90

error: Failed to open file '@/tmp/ifxarg6DL4Me' for read [FyppFatalError]

error: [Errno 2] No such file or directory: '@/tmp/ifxarg6DL4Me' [FileNotFoundError]

It seems like the compiler prepends @ to the path, but otherwise it seems it could work. If you'd like to experiment, here is the toy code:
! fypp_example.F90

#:def hello(name)

print *, "Hello ${name}$"

#:enddef

#:if defined('NAME')

$:hello(NAME)

#:else

print *, "Hello World"

#:endif

end

cpp

This answer from Jim Dempsey is taken from the intel forum

‍You could experiment with shell piping gcc preprocessor in front of (or in place of) fpp.

In your development environment, insert in PATH, in front of other paths, a path to a GCChack folder containing a copy of the GCC preprocessor renamed to FPP.EXE. This assumes the GCC preprocessor can completely preprocess the source. This can also be a shell program > youwrite that handles the shell call to GCC then to FPP.

Plan B is to create a batch file that first runs the GCC preprocessor, then runs the FPP preprocessor. Place the batch file into the "hack" folder under the name "FPP.EXE". Windows will (has for me) examine the contents of the start of the file and determine it is a batch file.

Plan C is to create pre-build events and actions to pre-pre-process the files using the GCC pre-processor.

Table of Contents

fpp

fpp-name

Known issues

cpp