diff --git a/cross/arm/toolchain.cmake b/cross/arm/toolchain.cmake
new file mode 100644
index 0000000000..fe08a7ad71
--- /dev/null
+++ b/cross/arm/toolchain.cmake
@@ -0,0 +1,28 @@
+set(CROSS_ROOTFS $ENV{ROOTFS_DIR})
+
+set(CMAKE_SYSTEM_NAME Linux)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR armv7l)
+
+## Specify the toolchain
+set(TOOLCHAIN "arm-linux-gnueabihf")
+
+add_compile_options(-target armv7-linux-gnueabihf)
+add_compile_options(-mthumb)
+add_compile_options(-mfpu=vfpv3)
+add_compile_options(--sysroot=${CROSS_ROOTFS})
+
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -target ${TOOLCHAIN}")
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -B ${CROSS_ROOTFS}/usr/lib/gcc/${TOOLCHAIN}")
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} -L${CROSS_ROOTFS}/lib/${TOOLCHAIN}")
+set(CROSS_LINK_FLAGS "${CROSS_LINK_FLAGS} --sysroot=${CROSS_ROOTFS}")
+
+set(CMAKE_EXE_LINKER_FLAGS    "${CMAKE_EXE_LINKER_FLAGS}    ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${CROSS_LINK_FLAGS}" CACHE STRING "" FORCE)
+
+set(CMAKE_FIND_ROOT_PATH "${CROSS_ROOTFS}")
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
diff --git a/src/corehost/build.sh b/src/corehost/build.sh
index 9b1ccf2bc8..aadab0b820 100755
--- a/src/corehost/build.sh
+++ b/src/corehost/build.sh
@@ -33,8 +33,8 @@ usage()
     echo "  --fxrver <HostFxr version>        Version of the hostfxr library"
     echo "  --policyver <HostPolicy version>  Version of the hostpolicy library"
     echo "  --commithash <Git commit hash>   Current commit hash of the repo at build time"
-    echo "  --xcompiler <Cross C++ Compiler>  Cross Compiler when the target is arm"
-    echo "                                    e.g.) /usr/bin/arm-linux-gnueabi-g++-4.7"
+    echo "  --cross                           Optional argument to signify cross compilation,"
+    echo "                                    and use ROOTFS_DIR environment variable to find rootfs."
 
     exit 1
 }
@@ -88,9 +88,7 @@ while [ "$1" != "" ]; do
             shift
             __commit_hash=$1
             ;;
-        --xcompiler)
-            shift
-            __CrossCompiler="$1"
+        --cross)
             __CrossBuild=1
             ;;
         *)
@@ -142,7 +140,7 @@ __base_rid=$__rid_plat-$__build_arch_lowcase
 echo "Building Corehost from $DIR to $(pwd)"
 set -x # turn on trace
 if [ $__CrossBuild == 1 ]; then
-    cmake "$DIR" -G "Unix Makefiles" $__cmake_defines -DCLI_CMAKE_RUNTIME_ID:STRING=$__runtime_id -DCLI_CMAKE_HOST_VER:STRING=$__host_ver -DCLI_CMAKE_HOST_FXR_VER:STRING=$__fxr_ver -DCLI_CMAKE_HOST_POLICY_VER:STRING=$__policy_ver -DCLI_CMAKE_PKG_RID:STRING=$__base_rid -DCLI_CMAKE_COMMIT_HASH:STRING=$__commit_hash -DCMAKE_CXX_COMPILER="$__CrossCompiler"
+    cmake "$DIR" -G "Unix Makefiles" $__cmake_defines -DCLI_CMAKE_RUNTIME_ID:STRING=$__runtime_id -DCLI_CMAKE_HOST_VER:STRING=$__host_ver -DCLI_CMAKE_HOST_FXR_VER:STRING=$__fxr_ver -DCLI_CMAKE_HOST_POLICY_VER:STRING=$__policy_ver -DCLI_CMAKE_PKG_RID:STRING=$__base_rid -DCLI_CMAKE_COMMIT_HASH:STRING=$__commit_hash -DCMAKE_TOOLCHAIN_FILE=$DIR/../../cross/$__build_arch_lowcase/toolchain.cmake
 else
     cmake "$DIR" -G "Unix Makefiles" $__cmake_defines -DCLI_CMAKE_RUNTIME_ID:STRING=$__runtime_id -DCLI_CMAKE_HOST_VER:STRING=$__host_ver -DCLI_CMAKE_HOST_FXR_VER:STRING=$__fxr_ver -DCLI_CMAKE_HOST_POLICY_VER:STRING=$__policy_ver -DCLI_CMAKE_PKG_RID:STRING=$__base_rid -DCLI_CMAKE_COMMIT_HASH:STRING=$__commit_hash
 fi