GitHub - llvm-flang/flang: Fortran Front-End (original) (raw)

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

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

Flang is a Fortran front-end.

Note:

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

Download LLVM source and move to a branch with a reference known to work with Flang.

git clone https://github.com/llvm-mirror/llvm.git cd llvm git clone http://llvm.org/git/llvm.git

Download the Flang source code within the LLVM tree, the two will be compiled together.

cd llvm/tools & git clone git://github.com/llvm-flang/flang.git

Compile LLVM and Flang together.

mkdir build cd build & cmake ../ -DCMAKE_INSTALL_PREFIX=/usr cd build & make cd build & make install

You will also need to install the Flang standard library, which the Flang compiler links to by default. This is built outside the LLVM tree.

git clone git://github.com/llvm-flang/libflangrt.git cd libflangrt mkdir build cd build & cmake ../ -DCMAKE_INSTALL_PREFIX=/usr cd build & make cd build & make install

Testing:

cmake -DLLVM_INCLUDE_TESTS=On .. make check-flang

If built within LLVM source tree, it should pick up test settings from it and running a separate make command should not be necessary. If you want to build tests in standalone flang build, make sure to add CMake flags that would install FileCheck with LLVM:

-DLLVM_INSTALL_UTILS=On -DLLVM_INCLUDE_TESTS=On

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

Flang's driver will instruct the linker to link with the libflang runtime. You can get libflang at https://github.com/llvm-flang/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 //===----------------------------------------------------------------------===//

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