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+# Compatibility
+
+Compatibility of the interfaces provided by musl with existing standards and
+software packages.
+
+## Standards compatibility tables
+
+- [POSIX 2008 API coverage][POSIX2008] (obsolete STREAMS and posix_trace APIs
+  are not included)
+- [C99 API coverage][C99]
+- [C11 API coverage][C11] (optional annex K is not included)
+
+[POSIX2008]: http://nsz.repo.hu/git/?p=musl-tables;a=blob_plain;f=tab_posix.html;hb=HEAD
+[C99]: http://nsz.repo.hu/git/?p=musl-tables;a=blob_plain;f=tab_c99.html;hb=HEAD
+[C11]: http://nsz.repo.hu/git/?p=musl-tables;a=blob_plain;f=tab_c11.html;hb=HEAD
+
+## Compatibility with other implementations
+
+- [[Functional differences from glibc]]
+- [Comparison] with other Linux libc implementations.
+
+[Comparison]: https://www.etalabs.net/compare_libcs.html
+
+## Software compatibility, patches and build instructions
+
+- pkgsrc based software compatibility table:
+    - [[Pkgsrc results]] (warning: very large wiki page, renders slowly)
+    - pkgsrc results are archived at <http://musl.codu.org>.
+    - The necessary patches are at [musl-pkgsrc-patches (hg)] or
+      [musl-pkgsrc-patches (git)].
+- Build instructions and patches for various software packages:
+    - [sabotage recipes], [patches][sabotage patches]
+    - [LightCube packages]
+    - [Dragora recipes], [patches][Dragora patches]
+    - [Alpine ports]
+    - [Gentoo overlay with musl support]
+    - See the packaging work in various other
+      [[distributions|Projects using musl#linux-distributions-using-musl]].
+
+[musl-pkgsrc-patches (hg)]: http://bitbucket.org/GregorR/musl-pkgsrc-patches
+[musl-pkgsrc-patches (git)]: https://github.com/GregorR/musl-pkgsrc-patches
+[sabotage recipes]: http://github.com/sabotage-linux/sabotage/tree/master/pkg
+[sabotage patches]: http://github.com/sabotage-linux/sabotage/tree/master/KEEP
+[LightCube packages]: https://github.com/jhuntwork/lightcube-bootstrap-musl/tree/master/packages
+[Dragora recipes]: http://git.savannah.gnu.org/cgit/dragora.git/tree/recipes
+[Dragora patches]: http://git.savannah.gnu.org/cgit/dragora.git/tree/patches
+[Alpine ports]: http://git.alpinelinux.org/cgit/aports/tree/main/
+[Gentoo overlay with musl support]: http://git.overlays.gentoo.org/gitweb/?p=proj/hardened-dev.git;a=shortlog;h=refs/heads/musl
+