NAME¶

LFortran - modern interactive LLVM-based Fortran compiler

SYNOPSIS¶

lfortran OPTIONS [files...] [SUBCOMMAND]

DESCRIPTION¶

LFortran is a modern interactive Fortran compiler based on LLVM.

OPTIONS¶

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-h, --help: Print this help message and exit

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-S: Emit assembly, do not assemble or link

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-c: Compile and assemble, do not link

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-o TEXT: Specify the file to place the compiler’s output into

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-v: Be more verbose

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-E: Preprocess only; do not compile, assemble, or link

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-l TEXT ...: Link library option

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-L TEXT ...: Library path option

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-I TEXT ...: Include path

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-J TEXT: Where to save mod files

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-g: Compile with debugging information

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--debug-with-line-column: Convert the linear location info into line + column in the debugging information

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-D TEXT ...: Define <macro>=<value> (or 1 if <value> omitted)

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--version: Display compiler version information

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-W TEXT ...: Linker flags

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-f TEXT ...: All -f* flags (only -fPIC supported for now)

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--cpp: Enable C preprocessing

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--fixed-form: Use fixed form Fortran source parsing

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--fixed-form-infer: Use heuristics to infer if a file is in fixed form

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--no-prescan: Turn off prescan

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--show-prescan: Show tokens for the given file and exit

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--show-tokens: Show tokens for the given file and exit

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--show-ast: Show AST for the given file and exit

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--show-asr: Show ASR for the given file and exit

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--with-intrinsic-mods: Show intrinsic modules in ASR

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--show-ast-f90: Show Fortran from AST for the given file and exit

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--no-color: Turn off colored AST/ASR

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--no-indent: Turn off Indented print ASR/AST

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--tree: Tree structure print ASR/AST

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--json: Print ASR/AST Json format

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--no-loc: Skip location information in ASR/AST Json format

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--visualize: Print ASR/AST Visualization

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--pass TEXT: Apply the ASR pass and show ASR (implies –show-asr)

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--skip-pass TEXT: Skip an ASR pass in the default pipeline

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--show-llvm: Show LLVM IR for the given file and exit

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--show-cpp: Show C++ translation source for the given file and exit

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--show-c: Show C translation source for the given file and exit

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--show-asm: Show assembly for the given file and exit

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--show-wat: Show WAT (WebAssembly Text Format) and exit

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--show-julia: Show Julia translation source for the given file and exit

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--show-fortran: Show Fortran translation source for the given file and exit

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--show-stacktrace: Show internal stacktrace on compiler errors

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--symtab-only: Only create symbol tables in ASR (skip executable stmt)

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--time-report: Show compilation time report

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--static: Create a static executable

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--no-warnings: Turn off all warnings

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--no-error-banner: Turn off error banner

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--error-format TEXT=human: Control how errors are produced (human, short)

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--backend TEXT=llvm: Select a backend (llvm, cpp, x86, wasm, fortran)

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--openmp: Enable OpenMP

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--generate-object-code: Generate object code into .o files

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--rtlib: Include the full runtime library in the LLVM output

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--use-loop-variable-after-loop: Allow using loop variable after the loop

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--fast: Best performance (disable strict standard compliance)

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--link-with-gcc: Calls GCC for linking instead of clang

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--target TEXT: Generate code for the given target

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--print-targets: Print the registered targets

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--implicit-typing: Allow implicit typing

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--implicit-interface: Allow implicit interface

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--implicit-argument-casting: Allow implicit argument casting

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--print-leading-space: Print leading white space if format is unspecified

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--interactive-parse: Use interactive parse

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--verbose: Print debugging statements

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--dump-all-passes: Apply all the passes and dump the ASR into a file

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--dump-all-passes-fortran: Apply all passes and dump the ASR after each pass into a Fortran file

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--cumulative: Apply all the passes cumulatively till the given pass

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--realloc-lhs: Reallocate left-hand side automatically

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--module-mangling: Mangles the module name

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--global-mangling: Mangles all the global symbols

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--intrinsic-mangling: Mangles all the intrinsic symbols

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--all-mangling: Mangles all possible symbols

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--bindc-mangling: Mangles functions with ABI bind(c)

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--apply-fortran-mangling: Mangle symbols with Fortran supported syntax

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--mangle-underscore: Mangles with underscore

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--legacy-array-sections: Enables passing array items as sections if required

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--ignore-pragma: Ignores all the pragmas

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--stack-arrays: Allocate memory for arrays on stack

SUBCOMMANDS¶

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fmt: Format Fortran source files.

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kernel: Run in Jupyter kernel mode.

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mod: Fortran mod file utilities.

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pywrap: Python wrapper generator

SEE ALSO¶

For more information, visit the official LFortran documentation at https://docs.lfortran.org/.