[lua] Add [cpp] feature to additionally build lua-c++ (#7101)

* [lua] Add [cpp] feature to build lua-c++

* [lua] Switch tab for spaces in CMakeLists, set version to 5.3.5-2 as requested

* Use spaces for indentation

ports/lua/CMakeLists.txt

@@ -52,6 +52,9 @@ ENDIF ()
 
 #DLL
 ADD_LIBRARY ( lua ${SRC_LIBLUA} )
+IF (COMPILE_AS_CPP)
+    SET_TARGET_PROPERTIES(lua PROPERTIES OUTPUT_NAME "lua-c++")
+ENDIF()
 
 IF (BUILD_SHARED_LIBS AND WIN32)
     TARGET_COMPILE_DEFINITIONS (lua PUBLIC -DLUA_BUILD_AS_DLL )

ports/lua/CONTROL

@@ -1,4 +1,7 @@
 Source: lua
-Version: 5.3.5-1
+Version: 5.3.5-2
 Homepage: https://www.lua.org
 Description: a powerful, fast, lightweight, embeddable scripting language
+
+Feature: cpp
+Description: Builds lua for C++ linkage.

ports/lua/portfile.cmake

@@ -1,12 +1,5 @@
-# Common Ambient Variables:
-#   VCPKG_ROOT_DIR = <C:\path\to\current\vcpkg>
-#   TARGET_TRIPLET is the current triplet (x86-windows, etc)
-#   PORT is the current port name (zlib, etc)
-#   CURRENT_BUILDTREES_DIR = ${VCPKG_ROOT_DIR}\buildtrees\${PORT}
-#   CURRENT_PACKAGES_DIR  = ${VCPKG_ROOT_DIR}\packages\${PORT}_${TARGET_TRIPLET}
-#
-
 include(vcpkg_common_functions)
+
 vcpkg_download_distfile(ARCHIVE
     URLS "https://www.lua.org/ftp/lua-5.3.5.tar.gz"
     FILENAME "lua-5.3.5.tar.gz"
@@ -32,6 +25,20 @@ vcpkg_configure_cmake(
 
 vcpkg_install_cmake()
 
+if("cpp" IN_LIST FEATURES)
+    vcpkg_configure_cmake(
+        SOURCE_PATH ${SOURCE_PATH}
+        PREFER_NINJA
+        OPTIONS
+            -DCOMPILE_AS_CPP=ON
+        OPTIONS_DEBUG
+            -DSKIP_INSTALL_HEADERS=ON
+            -DSKIP_INSTALL_TOOLS=ON
+    )
+
+    vcpkg_install_cmake()
+endif()
+
 if(VCPKG_LIBRARY_LINKAGE STREQUAL dynamic)
     if(NOT VCPKG_CMAKE_SYSTEM_NAME OR VCPKG_CMAKE_SYSTEM_NAME STREQUAL WindowsStore)
         file(READ ${CURRENT_PACKAGES_DIR}/include/luaconf.h LUA_CONF_H)