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This patch fix first point of https://github.com/llvm/llvm-project/issues/60730. https://flang.llvm.org/docs/ has no build instructions. This doc page is just a copy of README page so that it can be accessible from website. Differential Revision: https://reviews.llvm.org/D148070
43 lines
1.6 KiB
Markdown
43 lines
1.6 KiB
Markdown
# Flang
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Flang is a ground-up implementation of a Fortran front end written in modern
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C++. It started off as the f18 project (https://github.com/flang-compiler/f18)
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with an aim to replace the previous flang project
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(https://github.com/flang-compiler/flang) and address its various deficiencies.
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F18 was subsequently accepted into the LLVM project and rechristened as Flang.
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Please note that flang is not ready yet for production usage.
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## Getting Started
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Read more about flang in the [docs directory](docs).
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Start with the [compiler overview](docs/Overview.md).
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To better understand Fortran as a language
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and the specific grammar accepted by flang,
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read [Fortran For C Programmers](docs/FortranForCProgrammers.md)
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and
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flang's specifications of the [Fortran grammar](docs/f2018-grammar.md)
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and
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the [OpenMP grammar](docs/OpenMP-4.5-grammar.md).
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Treatment of language extensions is covered
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in [this document](docs/Extensions.md).
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To understand the compilers handling of intrinsics,
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see the [discussion of intrinsics](docs/Intrinsics.md).
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To understand how a flang program communicates with libraries at runtime,
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see the discussion of [runtime descriptors](docs/RuntimeDescriptor.md).
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If you're interested in contributing to the compiler,
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read the [style guide](docs/C++style.md)
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and
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also review [how flang uses modern C++ features](docs/C++17.md).
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If you are interested in writing new documentation, follow
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[LLVM's Markdown style guide](https://github.com/llvm/llvm-project/blob/main/llvm/docs/MarkdownQuickstartTemplate.md).
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Consult the [Getting Started with Flang](docs/GettingStarted.md)
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for information on building and running flang.
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