remove interpreters/xxx/README.md. Migrated to Documentation/applications/interpreters
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-# Interpreters
-
-This `apps/` directory is set aside to hold interpreters that may be
-incorporated into NuttX.
-
-## Ficl
-
-This is DIY port of Ficl (the _Forth Inspired Command Language_). See
-http://ficl.sourceforge.net/. It is a _DIY_ port because the Ficl source is not
-in that directory, only an environment and instructions that will let you build
-Ficl under NuttX. The rest is up to you.
-
-## Lua
-
-Fetch and build a Lua interpreter. Versions 5.2 through 5.4 are supported. The
-`lua` command will be added to NSH. Lua can run a script for a given path,
-execute a string of code, or open a readline compatible REPL on the NSH console.
-The `<lua.h>` and `<lauxlib.h>` headers are available to start a new embedded
-interpreter or extend Lua with C modules. See the `luamod_hello` example for how
-to include a built-in module.
-
-A math library is required to build. Enable the `LIBM` config or use a
-toolchain provided math library.
-
-The following configs are recommended for a full featured Lua interpreter:
-- `LIBC_FLOATINGPOINT`
-- `SYSTEM_READLINE`
-
-## Mini Basic
-
-The Mini Basic implementation at `apps/interpreters` derives from version `1.0`
-by Malcolm McLean, Leeds University, and was released under the Creative Commons
-Attibution license. I am not legal expert, but this license appears to be
-compatible with the NuttX BSD license see:
-https://creativecommons.org/licenses/. I, however, cannot take responsibility
-for any actions that you might take based on my understanding. Please use your
-own legal judgement.
diff --git a/interpreters/bas/README.md b/interpreters/bas/README.md
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-# Interpreters / `bas` Bas BASIC
-
-## Introduction
-
-Bas is an interpreter for the classic dialect of the programming language BASIC.
-It is pretty compatible to typical BASIC interpreters of the 1980s, unlike some
-other UNIX BASIC interpreters, that implement a different syntax, breaking
-compatibility to existing programs. Bas offers many ANSI BASIC statements for
-structured programming, such as procedures, local variables and various loop
-types. Further there are matrix operations, automatic LIST indentation and many
-statements and functions found in specific classic dialects. Line numbers are
-not required.
-
-The interpreter tokenises the source and resolves references to variables and
-jump targets before running the program. This compilation pass increases
-efficiency and catches syntax errors, type errors and references to variables
-that are never initialised. Bas is written in ANSI C for UNIX systems.
-
-## License
-
-BAS 2.4 is released as part of NuttX under the standard 3-clause BSD license use
-by all components of NuttX. This is not incompatible with the original BAS 2.4
-licensing
-
-Copyright (c) 1999-2014 Michael Haardt
-
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
-the Software, and to permit persons to whom the Software is furnished to do so,
-subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
-FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
-COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
-IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-## Bas 2.4 Release Notes
-
-Changes compared to version `2.3`
-
-- Matrix inversion on integer arrays with option base 1 fixed.
-- `PRINT USING` behaviour for `!` fixed.
-- `PRINT`, separator should advance to the next zone, even if the current
-  position is at the start of a zone.
-- Added `ip()`, `frac()`, `fp()`, `log10()`, `log2()`, `min()` and `max()`.
-- Fixed `NEXT` checking the variable case sensitive.
-- Use `terminfo` capability cr to make use of its padding.
-- `LET` segmentation fault fixed.
-- `PRINT` now uses print items.
-- `-r` for restricted operation.
-- `MAT INPUT` does not drop excess arguments, but uses them for the next row.
-- License changed to MIT.
diff --git a/interpreters/ficl/README.md b/interpreters/ficl/README.md
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-# Interpreters / `ficl` Ficl
-
-Ficl is a programming language interpreter designed to be embedded into other
-systems as a command, macro, and development prototyping language. Ficl is an
-acronym for _Forth Inspired Command Language_. See http://ficl.sourceforge.net/
-
-## Build Instructions
-
-Disclaimer: This installation steps have only been exercised using Ficl 4.1.0.
-With new versions you will likely have to make some adjustments to this
-instructtions or to the files within this directory. Think of this information
-as _recommendations_ - not necessarily proven instructions.
-
-1. `cd` to `interpreters/ficl`
-
-2. Download Ficl: http://sourceforge.net/projects/ficl/files/
-
-3. Uznip the Ficl compressed file.
-
-   For example, `unzip ficl-4.1.0.zip` will leave the file
-   `interpreters/ficl/ficl-4.1.0`.
-
-4. Configure to build Ficl in the `interpreters/ficl` directory using the
-   `configure.sh` script.
-
-   For example, `./configure.sh ficl-4.1.0` will leave the Makefile fragment
-   `Make.srcs` in the ficl build directory.
-
-5. Create your NuttX configuration. Using the `make menuconfig`, you should
-   select:
-
-   ```conf
-   CONFIG_INTERPRETERS_FICL=y
-   ```
-
-6. Configure and build NuttX. On successful completion, the Ficl objects will be
-   available in `apps/libapps.a` and that NuttX binary will be linked against
-   that file. Of course, Ficl will do nothing unless you have written some
-   application code that uses it!