cmake: introduce BUILD_LINK_LUA_LIBRARIES option

close #302, `cmake -DBUILD_LINK_LUA_LIBRARIES=ON`

CMakeLists.txt

@@ -5,6 +5,10 @@ set(CMAKE_MACOSX_RPATH 1)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
     "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
 option(BUILD_SHARED_LUA_OPENSSL "Shared or Static lua-openssl" ON)
+option(BUILD_LINK_LUA_LIBRARIES "Link Lua libraries during build-time" OFF)
+if(WIN32)
+    set(BUILD_LINK_LUA_LIBRARIES ON)
+endif()
 
 include(GNUInstallDirs)
 
@@ -87,14 +91,15 @@ target_link_libraries(lua-openssl PUBLIC
     Threads::Threads
 )
 
-if(WIN32)
-    target_link_libraries(lua-openssl PUBLIC
-        ${LUA_LIBRARIES}
-    )
-endif()
-
-if(APPLE)
-    target_link_options(lua-openssl PUBLIC -bundle -undefined dynamic_lookup)
+if(BUILD_LINK_LUA_LIBRARIES)
+    target_link_libraries(lua-openssl PUBLIC ${LUA_LIBRARIES})
+    if(UNIX)
+      target_link_options(lua-openssl PUBLIC -Wl,--no-undefined)
+    endif()
+else()
+    if(APPLE)
+        target_link_options(lua-openssl PUBLIC -bundle -undefined dynamic_lookup)
+    endif()
 endif()
 
 target_compile_options(lua-openssl PRIVATE -DLUA_LIB)

src/asn1.c

@@ -146,18 +146,9 @@ static int openssl_get_object(lua_State*L)
   int class = 0;
   int ret;
 
-  if (start > l)
-  {
-    lua_pushnil(L);
-    openssl_pushargerror(L, 2, "out of range");
-    return 2;
-  }
-  if (start>stop)
-  {
-    lua_pushnil(L);
-    openssl_pushargerror(L, 3, "before of start");
-    return 2;
-  }
+  luaL_argcheck(L, start > 0 && start < l, 2, "start out of length of asn1 string");
+  luaL_argcheck(L, stop > start, 3, "stop must be greater than start");
+  luaL_argcheck(L, stop <= l, 3, "stop out of length of asn1 string");
 
   p = (const unsigned char *)asn1s + start - 1;
   ret = ASN1_get_object(&p, &len, &tag, &class, stop - start + 1);