From 1bba969a4a7cc612e919884764c324df35188d90 Mon Sep 17 00:00:00 2001
From: Dirk Ziegelmeier <dirk@ziegelmeier.net>
Date: Fri, 12 Oct 2018 22:12:07 +0200
Subject: [PATCH] Next try to fix CMake build on Travis

---
 CMakeLists.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 23b66be4..8410c1f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,6 @@ elseif(${CMAKE_SYSTEM_NAME} STREQUAL Linux OR ${CMAKE_SYSTEM_NAME} STREQUAL Darw
   add_subdirectory(${LWIP_DIR}/contrib/ports/unix/example_app)
 else()
   message(WARNING "Host ${CMAKE_SYSTEM_NAME} is not supported to build example_app")
-  include(src/Filelists.cmake)
 endif()
 
 # Source package generation
@@ -27,5 +26,8 @@ set(CPACK_SOURCE_PACKAGE_FILE_NAME "lwip-${LWIP_VERSION_MAJOR}.${LWIP_VERSION_MI
 include(CPack)
 
 # Target for package generation
+if ("${lwipcore_SRCS}" STREQUAL "")
+  include(src/Filelists.cmake)
+endif()
 add_custom_target(dist COMMAND ${CMAKE_MAKE_PROGRAM} package_source)
 add_dependencies(dist lwipdocs)