Add support for RK3576 platform and restructure vendor packages directory

cross_compile/vendor/packages/gflags_vendor/CMakeLists.txt

@@ -0,0 +1,25 @@
+cmake_minimum_required(VERSION 3.8)
+project(gflags_vendor)
+
+
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wall -Wextra -Wpedantic)
+endif()
+
+# uncomment the following section in order to fill in
+# further dependencies manually.
+# find_package(<dependency> REQUIRED)
+
+
+include(FetchContent)
+FetchContent_Declare(
+  gflags_vendor
+  URL https://github.com/gflags/gflags/archive/v2.2.1.zip
+  # SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/ext/
+)
+
+set(BUILD_SHARED_LIBS ON CACHE BOOL "Build shared libraries" FORCE)
+set(INSTALL_HEADERS ON CACHE BOOL "Request installation of headers and other development files." FORCE)
+set(GFLAGS_NAMESPACE "google" CACHE STRING "gflags namespace" FORCE)
+
+FetchContent_MakeAvailable(gflags_vendor)

cross_compile/vendor/packages/gflags_vendor/package.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<?xml-model href="http://download.ros.org/schema/package_format3.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
+<package format="3">
+  <name>gflags_vendor</name>
+  <version>0.0.0</version>
+  <description>TODO: Package description</description>
+  <maintainer email="ericzhao0325@163.com">ericx</maintainer>
+  <license>TODO: License declaration</license>
+
+  <export>
+    <build_type>cmake</build_type>
+  </export>
+</package>