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@@ -26,7 +26,7 @@ This is not the manual; man pages `snac(1)` (user manual), `snac(5)` (formats) a
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## Building and installation
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-This program is written in highly portable C. The only external dependencies are `openssl` and `curl`.
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+This program is written in highly portable C. It uses the `__attribute__((__cleanup__))` GNU extension, that is supported at least by the `gcc`, `clang` and `tcc` C compilers. The only external dependencies are `openssl` and `curl`.
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On Debian/Ubuntu, you can satisfy these requirements by running
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@@ -124,4 +124,6 @@ See the LICENSE file for details.
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grunfink [@grunfink@comam.es](https://comam.es/snac/grunfink) with the help of others.
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-Buy grunfink a coffee: https://ko-fi.com/grunfink
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+Buy grunfink a coffee: https://ko-fi.com/grunfink/
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+
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+Contribute via LiberaPay: https://liberapay.com/grunfink/
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