updated build system

scripts/env.sh

@@ -7,6 +7,8 @@ PROJECT_IS_MINGW=$4
 PROJECT_IS_MINGW_UNIX=$5
 DISABLE_CREATE_DIRS=$6
 
+PROJECT_CXX_STANDARD=23
+PROJECT_C_STANDARD=11
 PROJECT_FLUTTER_BASE_HREF="/"
 
 if [ "${PROJECT_IS_MINGW}" != "1" ]; then
@@ -46,7 +48,7 @@ for PROJECT_LIBRARY in "${PROJECT_LIBRARIES[@]}"; do
 done
 
 PROJECT_APP_LIST=()
-PROJECT_CMAKE_OPTS=""
+PROJECT_CMAKE_OPTS="-DCMAKE_C_STANDARD=${PROJECT_C_STANDARD} -DCMAKE_CXX_STANDARD=${PROJECT_CXX_STANDARD}"
 PROJECT_ENABLE_V2_ERRORS=OFF
 PROJECT_ENABLE_WIN32_LONG_PATH_NAMES=OFF
 PROJECT_IS_ALPINE=0
@@ -340,6 +342,8 @@ export PROJECT_CMAKE_BUILD_TYPE_LOWER
 export PROJECT_CMAKE_OPTS
 export PROJECT_COMPANY_NAME
 export PROJECT_COPYRIGHT
+export PROJECT_CXX_STANDARD
+export PROJECT_C_STANDARD
 export PROJECT_DESC
 export PROJECT_DIST_DIR
 export PROJECT_ENABLE_V2_ERRORS
@@ -391,6 +395,8 @@ echo "  Build arch2: ${PROJECT_BUILD_ARCH2}"
 echo "  Build clean: ${PROJECT_BUILD_CLEAN}"
 echo "  Build dir: ${PROJECT_BUILD_DIR}"
 echo "  Build shared libraries: ${PROJECT_BUILD_SHARED_LIBS}"
+echo "  C std: ${PROJECT_C_STANDARD}"
+echo "  CXX std: ${PROJECT_CXX_STANDARD}"
 echo "  CMake options: -G\"Unix Makefiles\" -DPROJECT_COMPANY_NAME=\"${PROJECT_COMPANY_NAME}\" -DPROJECT_COPYRIGHT=\"${PROJECT_COPYRIGHT}\" -DPROJECT_DESC=\"${PROJECT_DESC}\" -DPROJECT_URL=\"${PROJECT_URL}\" ${PROJECT_CMAKE_OPTS} "
 echo "  CMake toolchain file: ${PROJECT_TOOLCHAIN_FILE_CMAKE}"
 echo "  Cmake Build type: ${PROJECT_CMAKE_BUILD_TYPE}"