Fortran M Compiler and Linker

The Fortran M preprocessor  converts a Fortran M file (.fm) into Fortran 77  (.f ) and C (__.c ) files. Fortran M statements are replaced by calls to the Fortran M libraries or to C procedures generated by the Fortran M preprocessor and located in the __.c file. You should need to refer to these generated .f and __.c files only when debugging, as described in §4.1.3 and §4.2.

The .f and __.c files are compiled and combined into a single object (.o ),  file.

Object files produced by the Fortran M compiler can be linked with other object files, with the Fortran M libraries, and with system libraries to produce an executable program that can be run as described in §4.2.

In addition to normal compiler arguments such as -c , -o , -l , and -L  which behave as in most other compilers, and the CPP arguments described previously (§4.1.1), the behavior of the Fortran M compiler and linker can be modified with the following arguments:

• -allow_common : Treat each COMMON  as if it were a PROCESS COMMON . (By default, Fortran M programs do not allow COMMON  data, but instead require the use of PROCESS COMMON  data.)

• -rangecheck : Compile the .f file with range checking   turned on (if the target computer's Fortran 77  compiler supports range checking).

• -g : Compile and link the source files with debugging and consistency checks enabled.

• -safe : Compile and link the source files with consistency checks enabled.

• -pg : Compile and link the source files with profiling enabled.

• -f_flag flag : Pass flag to the Fortran compiler when compiling .f files.

• -c_flag flag : Pass flag to the C compiler when compiling .c files.

• -C : Stop after compiling the .fm file to a .f and a __.c file.

• -static : Link the executable using statically linked rather than dynamically linked libraries.

A complete list of Fortran M compiler arguments, and a brief description of their meaning, can be obtained by running fm -h .