mirror-llvm-project/flang
aokblast e6190fab2e
[clang] Switch to Default PIE on FreeBSD (#206139)
We have started to compile the binary in our base as PIE by defualt. It
makes sense to compile the binary to PIE by default in toolchain as
Linux now. Also, extended testcases to support default PIE and no-pie
parameter in freebsd.c and hip-fpie-option.hip.
2026-07-22 11:26:36 +08:00
..
cmake [flang][cmake] Enable the runtimes in the CMake caches (#205642) 2026-06-24 22:41:20 +01:00
docs [docs] Finish misc MyST migration (#210209) 2026-07-17 11:56:59 -07:00
examples [flang][OpenMP] Store DECLARE_TARGET information in WithOmpDeclarative (#201103) 2026-06-03 09:40:42 -05:00
include [flang][cuda] Add option for allocator registration function to CUFAddConstructor (#211098) 2026-07-21 20:41:14 +00:00
lib [flang][cuda] Add option for allocator registration function to CUFAddConstructor (#211098) 2026-07-21 20:41:14 +00:00
test [clang] Switch to Default PIE on FreeBSD (#206139) 2026-07-22 11:26:36 +08:00
tools [fakeflang] Also detect CMakeTestGNU.c (#210175) 2026-07-17 09:01:11 +02:00
unittests [flang][OpenMP] Fix metadirective loop semantic checks (#208844) 2026-07-15 11:13:41 -05:00
.clang-format
.clang-tidy
.drone.star
.gitignore
CMakeLists.txt [Flang] Multi-config CMake output paths in standalone builds (#208690) 2026-07-13 16:29:34 +02:00
LICENSE.TXT
Maintainers.md
README.md

Flang

Flang is a ground-up implementation of a Fortran front end written in modern C++. It started off as the f18 project (https://github.com/flang-compiler/f18) with an aim to replace the previous flang project (https://github.com/flang-compiler/flang) and address its various deficiencies. F18 was subsequently accepted into the LLVM project and rechristened as Flang.

Please note that flang is not ready yet for production usage.

Getting Started

Read more about flang in the docs directory. Start with the compiler overview.

To better understand Fortran as a language and the specific grammar accepted by flang, read Fortran For C Programmers and flang's specifications of the Fortran grammar and the OpenMP grammar.

Treatment of language extensions is covered in this document.

To understand the compilers handling of intrinsics, see the discussion of intrinsics.

To understand how a flang program communicates with libraries at runtime, see the discussion of runtime descriptors.

If you're interested in contributing to the compiler, read the style guide and also review how flang uses modern C++ features.

If you are interested in writing new documentation, follow LLVM's Markdown style guide.

Consult the Getting Started with Flang for information on building and running flang.