diff --git a/documentation/sdk-manual/sdk-extensible.xml b/documentation/sdk-manual/sdk-extensible.xml
index de0e7a7379..f23ecc8043 100644
--- a/documentation/sdk-manual/sdk-extensible.xml
+++ b/documentation/sdk-manual/sdk-extensible.xml
@@ -205,10 +205,11 @@
SDK environment now set up; additionally you may now run devtool to perform development tasks.
Run devtool --help for further details.
+
+ ARCH - missing this one. It gets set in meta/recipes-devtools/python/python3-native_3.5.5.bb (ARCH=${TARGET_ARCH})
AS - The minimal command and arguments to run the assembler
CC - The minimal command and arguments to run the C compiler
CFLAGS - Suggested C flags
@@ -220,27 +221,35 @@
CXXFLAGS - Suggested C++ flags
DEPLOY_DIR_IMAGE
GDB - The minimal command and arguments to run the GNU Debugger
-
+ KCFLAGS - missing this one. It appears once in meta/classes/toolchain-scripts.bbclass
LD - The minimal command and arguments to run the linker
LDFLAGS - Suggested linker flags when you use CC to link
-
+ M4 - missing this one. It appears once in meta/recipes-devtools/flex/flex_2.6.0.bb
NM - The minimal command and arguments to run 'nm'
OBJCOPY - The minimal command and arguments to run 'objcopy'
OBJDUMP - The minimal command and arguments to run 'objdump'
-
+ OECORE_TARGET_SYSROOT - missing this one. It appears in meta/classes/toolchain-scripts.bbclass
PATH - The Linux variable that specifies the set of directories where executable programs are located.
PKG_CONFIG_PATH - The path to the target pkg-config files
-
+ PKG_CONFIG_SYSROOT_DIR - missing this one. It appears in meta/classes/cross-canadian.bbclass:export PKG_CONFIG_SYSROOT_DIR = "${STAGING_DIR_HOST}"
RANLIB - The minimal command and arguments to run 'ranlib'
SDKTARGETSYSROOT - The path to the sysroot used for cross-compilation
STRIP - The minimal command and arguments to run strip, which is used to strip symbols.
TARGET_PREFIX - The toolchain binary prefix for the target tools
+-->
+ Running the setup script defines many environment variables needed in
+ order to use the SDK (e.g. PATH,
+ CC,
+ LD,
+ and so forth).
+ If you want to see all the environment variables the script exports,
+ examine the installation file itself.