diff --git a/libcxx/docs/index.rst b/libcxx/docs/index.rst
--- a/libcxx/docs/index.rst
+++ b/libcxx/docs/index.rst
@@ -113,15 +113,15 @@
 
 Libc++ also supports common platforms and architectures:
 
-=============== ========================= ============================
-Target platform Target architecture       Notes
-=============== ========================= ============================
-macOS 10.9+     i386, x86_64, arm64       Building the shared library itself requires targetting macOS 10.11+
-FreeBSD 10+     i386, x86_64, arm
-Linux           i386, x86_64, arm, arm64
-Windows         i386, x86_64              Both MSVC and MinGW style environments
-AIX             powerpc, powerpc64
-=============== ========================= ============================
+=============== ========================= ====================== ============================
+Target platform Target architecture       supported libcs        Notes
+=============== ========================= ====================== ============================
+macOS 10.9+     i386, x86_64, arm64       ???-???                Building the shared library itself requires targetting macOS 10.11+
+FreeBSD 10+     i386, x86_64, arm         ???-???
+Linux           i386, x86_64, arm, arm64  glibc-2.24+
+Windows         i386, x86_64              MSVCRT-???, MinGW???   Both MSVC and MinGW style environments
+AIX             powerpc, powerpc64        ???-???
+=============== ========================= ====================== ============================
 
 Generally speaking, libc++ should work on any platform that provides a fairly complete
 C Standard Library. It is also possible to turn off parts of the library for use on