feat[build]: Add --toolchain to config toolchain for linux

for example
./make-Makefiles.bash --toolchain gcc-arm-10.3-2021.07-x86_64-aarch64-none-linux-gnu/bin/aarch64-none-linux-gnu-

Change-Id: I4804b1e1759aab04f715d826fbe412087298cb89
Signed-off-by: Yandong Lin <yandong.lin@rock-chips.com>

build/linux/arm/arm.linux.cross.cmake

@@ -1,9 +1,13 @@
 
 cmake_minimum_required( VERSION 2.6.3 )
 
+if(NOT TOOLCHAIN)
+    set(TOOLCHAIN "arm-linux-gnueabi-")
+endif()
+
 SET(CMAKE_SYSTEM_NAME Linux)
-SET(CMAKE_C_COMPILER "arm-linux-gnueabi-gcc")
-SET(CMAKE_CXX_COMPILER "arm-linux-gnueabi-g++")
+SET(CMAKE_C_COMPILER "${TOOLCHAIN}gcc")
+SET(CMAKE_CXX_COMPILER "${TOOLCHAIN}g++")
 SET(CMAKE_SYSTEM_PROCESSOR "armv7-a")
 #SET(CMAKE_SYSTEM_PROCESSOR "armv7-a_hardfp")
 

build/linux/arm/make-Makefiles.bash

@@ -24,7 +24,14 @@ fi
 
 # generate Makefile
 cmake -DCMAKE_BUILD_TYPE=Release \
+      -DTOOLCHAIN=${TOOLCHAIN} \
       -DCMAKE_TOOLCHAIN_FILE=./arm.linux.cross.cmake \
       -DHAVE_DRM=ON \
       -G "Unix Makefiles" \
       ${MPP_TOP}
+
+if [ "${CMAKE_PARALLEL_ENABLE}" = "0" ]; then
+    cmake --build .
+else
+    cmake --build . -j
+fi