Renamed ./src/external to ./src/extensions. No code logic changes. (0.40.5)

web/documentation/extensions/extensions.md

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+---
+layout: page
+published: true
+noToc: false
+noComments: false
+noDate: false
+title: Fun - Optional extensions
+subtitle: Catalog of optional, build-time selectable extensions for the Fun VM (e.g., cURL, SQLite, JSON).
+description: Catalog of optional, build-time selectable extensions for the Fun VM (e.g., cURL, SQLite, JSON).
+permalink: /documentation/extensions/
+lang: en
+tags:
+- area
+- catalog
+- contains
+- env
+- example
+- examples
+- extension
+- extensions
+- extensions
+- integrations
+- optional
+- required
+- requirements
+- run
+- scripts
+- them
+- under
+- vars
+- what
+---
+
+This section documents Fun's optional, build-time selectable extensions. Each page covers:
+
+- How to enable the extension via CMake option (FUN_WITH_*)
+- Build requirements and detection notes
+- Available opcodes and/or helper functions
+- Minimal usage examples and links to example scripts
+
+## Extensions:
+
+- [cURL (libcurl)](./curl/)
+- [INI (iniparser)](./ini/)
+- [JSON (json-c)](./json/)
+- [libxml2 (XML)](./xml2/)
+- [SQLite](./sqlite/)
+- [PCRE2 (Perl-compatible regex)](./pcre2/)
+- [PC/SC (Smart cards)](./pcsc/)
+- [OpenSSL](./openssl/)
+
+## Notes:
+
+- These integrations are optional; the VM compiles without them.
+- When disabled, related builtins usually return empty strings/neutral values rather than fail hard, mirroring existing optionality patterns.