flang

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//===----------------------------------------------------------------------===// // Fortran Language Family Front-end //===----------------------------------------------------------------------===//

flang: n. 1. A miner's two-pointed pick.

Flang is a Fortran front-end.

//===----------------------------------------------------------------------===// // Compiling Flang (master branch) //===----------------------------------------------------------------------===//

Flang depends on a fork of clang for some of its files. In order to compile Flang, you'll need to fetch the clang_branch and merge it with master in your local repository. After cloning flang, you can use the following commands to achieve this:

git fetch origin clang_branch git checkout clang_branch git checkout master git merge --squash --no-commit clang_branch git reset HEAD

//===----------------------------------------------------------------------===// // Using flang //===----------------------------------------------------------------------===//

Flang's driver will instruct the linker to link with the libflang runtime. You can get libflang at https://github.com/hyp/libflangrt . Once you have libflang, you'll need to tell flang where it is - you can use the -L option (e.g. -L~/libflang).

//===----------------------------------------------------------------------===// // To Do List //===----------------------------------------------------------------------===//

Short term:

• Fix lexing bugs
  • Fixed form for numerical literals (i.e. ignore whitespace)
  • Continuations in BOZ literals
  • Others
• 'INCLUDE' which search for files in the directory of the current file first.
• Full parsing of statements

Long term:

• Flang driver (?)
• Parsing GNU modules

Longer term:

• Fortran90/95 support
• IO support.