diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 2c6ebca102..2576b3a174 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1457,6 +1457,51 @@
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILD_AS_ARCH'><glossterm>BUILD_AS_ARCH</glossterm>
+            <info>
+                BUILD_AS_ARCH[doc] = "Specifies the architecture-specific assembler flags for the build host."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the architecture-specific assembler flags for
+                    the build host. By default, the value of
+                    <filename>BUILD_AS_ARCH</filename> is empty.
+                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-BUILD_CC_ARCH'><glossterm>BUILD_CC_ARCH</glossterm>
+            <info>
+                BUILD_CC_ARCH[doc] = "Specifies the architecture-specific C compiler flags for the build host."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the architecture-specific C compiler flags for
+                    the build host. By default, the value of
+                    <filename>BUILD_CC_ARCH</filename> is empty.
+                </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-BUILD_CCLD'><glossterm>BUILD_CCLD</glossterm>
+            <info>
+                BUILD_CCLD[doc] = "Specifies the linker command to be used for the build host when the C compiler is being used as the linker."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the linker command to be used for the build host
+                    when the C compiler is being used as the linker. By default,
+                    <filename>BUILD_CCLD</filename> points to GCC and passes as
+                    arguments the value of
+                    <link linkend='var-BUILD_CC_ARCH'><filename>BUILD_CC_ARCH</filename></link>,
+                    assuming <filename>BUILD_CC_ARCH</filename> is set.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUILD_CFLAGS'><glossterm>BUILD_CFLAGS</glossterm>
             <info>
                 BUILD_CFLAGS[doc] = "Specifies the flags to pass to the C compiler when building for the build host."
@@ -1506,6 +1551,52 @@
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILD_FC'><glossterm>BUILD_FC</glossterm>
+            <info>
+                BUILD_FC[doc] = "Specifies the Fortran compiler command for the build host."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the Fortran compiler command for the build host.
+                    By default, <filename>BUILD_FC</filename> points to
+                    Gfortran and passes as arguments the value of
+                    <link linkend='var-BUILD_CC_ARCH'><filename>BUILD_CC_ARCH</filename></link>,
+                    assuming <filename>BUILD_CC_ARCH</filename> is set.
+               </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-BUILD_LD'><glossterm>BUILD_LD</glossterm>
+            <info>
+                BUILD_LD[doc] = "Specifies the linker command for the build host."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the linker command for the build host. By default,
+                    <filename>BUILD_LD</filename> points to the GNU linker (ld)
+                    and passes as arguments the value of
+                    <link linkend='var-BUILD_LD_ARCH'><filename>BUILD_LD_ARCH</filename></link>,
+                    assuming <filename>BUILD_LD_ARCH</filename> is set.
+               </para>
+            </glossdef>
+        </glossentry>
+
+        <glossentry id='var-BUILD_LD_ARCH'><glossterm>BUILD_LD_ARCH</glossterm>
+            <info>
+                BUILD_LD_ARCH[doc] = "Specifies architecture-specific linker flags for the build."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies architecture-specific linker flags for the build
+                    host. By default, the value of
+                    <filename>BUILD_LD_ARCH</filename> is empty.
+               </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUILD_LDFLAGS'><glossterm>BUILD_LDFLAGS</glossterm>
             <info>
                 BUILD_LDFLAGS[doc] = "Specifies the flags to pass to the linker when building for the build host."
@@ -1579,6 +1670,21 @@
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILD_STRIP'><glossterm>BUILD_STRIP</glossterm>
+            <info>
+                BUILD_STRIP[doc] = "Specifies the command to be used to strip debugging symbols from binaries produced for the build host."
+            </info>
+            <glossdef>
+                <para role="glossdeffirst">
+<!--                <para role="glossdeffirst"><imagedata fileref="figures/define-generic.png" /> -->
+                    Specifies the command to be used to strip debugging symbols
+                    from binaries produced for the build host. By default,
+                    <filename>BUILD_STRIP</filename> points to
+                    <filename>${</filename><link linkend='var-BUILD_PREFIX'><filename>BUILD_PREFIX</filename></link><filename>}strip</filename>.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUILD_SYS'><glossterm>BUILD_SYS</glossterm>
             <info>
                 BUILD_SYS[doc] = "The toolchain binary prefix used for native recipes."