diff --git a/BUILDING.md b/BUILDING.md
index 99d10508f97473..a4a00a9f1ffe49 100644
--- a/BUILDING.md
+++ b/BUILDING.md
@@ -170,16 +170,15 @@ Binaries at are produced on:
| --------------------- | ------------------------------------------------------------------------ |
| aix-ppc64 | AIX 7.1 TL05 on PPC64BE with GCC 6 |
| darwin-x64 (and .pkg) | macOS 10.15, Xcode Command Line Tools 11 with -mmacosx-version-min=10.13 |
-| linux-arm64 | CentOS 7 with devtoolset-6 / GCC 6 |
-| linux-armv7l | Cross-compiled on Ubuntu 16.04 x64 with [custom GCC toolchain](https://github.com/rvagg/rpi-newer-crosstools) |
-| linux-ppc64le | CentOS 7 with devtoolset-6 / GCC 6 [7](#fn7) |
-| linux-s390x | RHEL 7 with devtoolset-6 / GCC 6 [7](#fn7) |
-| linux-x64 | CentOS 7 with devtoolset-6 / GCC 6 [7](#fn7) |
-| sunos-x64 | SmartOS 18 with GCC 7 |
+| linux-arm64 | CentOS 7 with devtoolset-8 / GCC 8 [8](#fn8) |
+| linux-armv7l | Cross-compiled on Ubuntu 18.04 x64 with [custom GCC toolchain](https://github.com/rvagg/rpi-newer-crosstools) |
+| linux-ppc64le | CentOS 7 with devtoolset-8 / GCC 8 [8](#fn8) |
+| linux-s390x | RHEL 7 with devtoolset-8 / GCC 8 [8](#fn8) |
+| linux-x64 | CentOS 7 with devtoolset-8 / GCC 8 [8](#fn8) |
| win-x64 and win-x86 | Windows 2012 R2 (x64) with Visual Studio 2019 |
-7: The Enterprise Linux devtoolset-6 allows us to compile
-binaries with GCC 6 but linked to the glibc and libstdc++ versions of the host
+8: The Enterprise Linux devtoolset-8 allows us to compile
+binaries with GCC 8 but linked to the glibc and libstdc++ versions of the host
platforms (CentOS 7 / RHEL 7). Therefore, binaries produced on these systems
are compatible with glibc >= 2.17 and libstdc++ >= 6.0.20 (`GLIBCXX_3.4.20`).
These are available on distributions natively supporting GCC 4.9, such as