updated build system

scripts/env.sh

@@ -193,7 +193,8 @@ fi
 PROJECT_DIST_DIR=${PROJECT_DIST_DIR}/${PROJECT_NAME}
 
 PROJECT_EXTERNAL_BUILD_ROOT=${PROJECT_BUILD_DIR}/deps
-PROJECT_3RD_PARTY_DIR=${PROJECT_SOURCE_DIR}/support/3rd_party
+PROJECT_SUPPORT_DIR=${PROJECT_SOURCE_DIR}/support
+PROJECT_3RD_PARTY_DIR=${PROJECT_SUPPORT_DIR}/3rd_party
 
 if [ "${PROJECT_ENABLE_OPENSSL}" == "ON" ]; then
   if [ "${PROJECT_IS_MINGW}" == "1" ] && [ "${PROJECT_IS_MINGW_UNIX}" == "1" ]; then
@@ -237,6 +238,7 @@ PROJECT_CMAKE_OPTS="-DPROJECT_RELEASE_NUM=${PROJECT_RELEASE_NUM} ${PROJECT_CMAKE
 PROJECT_CMAKE_OPTS="-DPROJECT_REQUIRE_ALPINE=${PROJECT_REQUIRE_ALPINE} ${PROJECT_CMAKE_OPTS}"
 PROJECT_CMAKE_OPTS="-DPROJECT_REVISION_VERSION=${PROJECT_REVISION_VERSION} ${PROJECT_CMAKE_OPTS}"
 PROJECT_CMAKE_OPTS="-DPROJECT_STATIC_LINK=${PROJECT_STATIC_LINK} ${PROJECT_CMAKE_OPTS}"
+PROJECT_CMAKE_OPTS="-DPROJECT_SUPPORT_DIR=${PROJECT_SUPPORT_DIR} ${PROJECT_CMAKE_OPTS}"
 PROJECT_CMAKE_OPTS="-DPROJECT_TOOLCHAIN_FILE_CMAKE=${PROJECT_TOOLCHAIN_FILE_CMAKE} ${PROJECT_CMAKE_OPTS}"
 PROJECT_CMAKE_OPTS="-DPROJECT_TOOLCHAIN_FILE_MESON=${PROJECT_TOOLCHAIN_FILE_MESON} ${PROJECT_CMAKE_OPTS}"
 
@@ -310,6 +312,7 @@ export PROJECT_REQUIRE_ALPINE
 export PROJECT_REVISION_VERSION
 export PROJECT_SOURCE_DIR
 export PROJECT_STATIC_LINK
+export PROJECT_SUPPORT_DIR
 export PROJECT_TOOLCHAIN_FILE_CMAKE
 export PROJECT_TOOLCHAIN_FILE_MESON
 export PROJECT_URL
@@ -354,6 +357,7 @@ echo "  PATH: ${PATH}"
 echo "  PKG_CONFIG_PATH: ${PKG_CONFIG_PATH}"
 echo "  Require Alpine: ${PROJECT_REQUIRE_ALPINE}"
 echo "  Static link: ${PROJECT_STATIC_LINK}"
+echo "  Support dir: ${PROJECT_SUPPORT_DIR}"
 echo "  Third-party dir: ${PROJECT_3RD_PARTY_DIR}"
 echo "  Unit testing enabled: ${PROJECT_ENABLE_TESTING}"
 echo "  URL: ${PROJECT_URL}"