2024-12-21 14:05:27 +01:00
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# Elna programming language
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2025-01-12 10:35:24 +01:00
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Elna is a simple, imperative, low-level programming language.
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It is intendet to accompany other languages in the areas, where a high-level
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language doesn't fit well. It is also supposed to be an intermediate
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representation for a such high-level hypothetical programming language.
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2024-12-21 14:05:27 +01:00
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## File extension
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.elna
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2025-01-12 10:35:24 +01:00
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## Current implementation
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This repository contains a GCC frontend for Elna. After finishing the frontend
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I'm planning to rewrite the compiler in Elna itself with its own backend and
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a hand-written parser. So GCC gives a way to have a simple bootstrap compiler
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and a possbility to compile Elna programs for different platforms.
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## Grammar
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2025-02-04 13:28:09 +01:00
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Flex and bison grammar specifications, `lexer.ll` and `parser.yy`, can be found
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in the `boot/` directory.
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2025-02-14 08:05:03 +01:00
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## Build
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The frontend requires GCC 14.2.0 (not tested with other versions).
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Download the GCC source. Copy the contents of this repository into `gcc/elna`
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inside GCC. Finally build GCC enabling the frontend with
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`--enable-languages=c,c++,elna`. After the installation the compiler can be
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invoked with `$prefix/bin/gelna`.
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There is also a `Rakefile` that downloads, builds and installs GCC into the
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`./build/` subdirectory. The `Rakefile` assumes that ruby and rake, as well as
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all GCC dependencies are already available in the system. It works under Linux
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and Mac OS. In the latter case GCC is patched with the patches used by Homebrew
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(official GCC doesn't support Apple silicon targets). Invoke with
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```sh
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rake boot
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```
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See `rake -T` for more tasks. The GCC source is under `build/tools`. The
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installation path is `build/host/install`.
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