diff --git a/tools/buildman/bsettings.py b/tools/buildman/bsettings.py
index 35bb2c1..f53564e 100644
--- a/tools/buildman/bsettings.py
+++ b/tools/buildman/bsettings.py
@@ -79,10 +79,13 @@
 [toolchain-prefix]
 # name = path to prefix
 # e.g. x86 = /opt/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-
+# arc = /opt/arc/arc_gnu_2021.03_prebuilt_elf32_le_linux_install/bin/arc-elf32-
 
 [toolchain-alias]
 # arch = alias
 # Indicates which toolchain should be used to build for that arch
+riscv = riscv32
+sh = sh4
 x86 = i386
 blackfin = bfin
 openrisc = or1k