[libc] Add a section about supported compilers in the documentation

Context #59368 Differential Revision: https://reviews.llvm.org/D141045
llvm · Jan 6, 2023 · 062a7ea · 062a7ea
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diff --git a/libc/docs/compiler_support.rst b/libc/docs/compiler_support.rst
@@ -0,0 +1,17 @@
+.. _compiler_support:
+
+================
+Compiler Support
+================
+
+As of now only ``Clang`` is fully supported.
+
+We are in the process of supporting ``GCC`` but some memory function implementations rely on `compiler intrinsics`__ that are not currently available in ``GCC``.
+As such we cannot guarantee optimal performance for these functions.
+
+.. __: https://clang.llvm.org/docs/LanguageExtensions.html#guaranteed-inlined-copy
+
+Minimum version
+===============
+
+ - ``Clang 11``
diff --git a/libc/docs/index.rst b/libc/docs/index.rst
@@ -69,6 +69,7 @@ stages there is no ABI stability in any form.
    :maxdepth: 1
    :caption: Development
 
+   compiler_support
    build_and_test
    developer_guides
    porting