Work on CMake build system - start working on Win32 port

.gitignore

@@ -2,6 +2,7 @@
 *.so
 *.a
 *lwip_unittests.xml
+*.suo
 .depend
 /ports/unix/unixsim/build
 /ports/unix/unixsim/simhost
@@ -9,6 +10,7 @@
 /ports/unix/unixsim/simnode
 /ports/unix/unixsim/makefsdata
 /ports/unix/minimal/echop
+/ports/win32/WindowsCMake/build
 /ports/win32/msvc/Debug
 /ports/win32/lwipcfg_msvc.h
 /ports/win32/msvc/Debug unittests

ports/CMakeCommon.cmake

@@ -19,10 +19,11 @@ endif()
 # ARM mbedtls support https://tls.mbed.org/
 set(MBEDTLSDIR ${LWIP_CONTRIB_DIR}/../mbedtls)
 if(EXISTS ${MBEDTLSDIR}/include/mbedtls/ssl.h)
+    add_subdirectory(${LWIP_CONTRIB_DIR}/../mbedtls mbedtls)
+
     add_definitions(-DLWIP_HAVE_MBEDTLS=1)
 
     include_directories(${MBEDTLSDIR}/include)
 
-    link_directories(${MBEDTLSDIR}/library)
     link_libraries(mbedtls mbedcrypto mbedx509)
 endif()

ports/win32/CMakeLists.txt

@@ -0,0 +1,14 @@
+set(lwipcontribportwindows_SRCS
+    sys_arch.c
+    sio.c
+    pcapif.c
+    pcapif_helper.c
+)
+
+# pcapif needs WinPcap developer package: https://www.winpcap.org/devel.htm
+find_library(WPCAP  wpcap  HINTS ${LWIP_CONTRIB_DIR}/../WpdPack/lib)
+find_library(PACKET packet HINTS ${LWIP_CONTRIB_DIR}/../WpdPack/lib)
+include_directories("${LWIP_CONTRIB_DIR}/../WpdPack/include")
+link_libraries(${WPCAP} ${PACKET})
+
+add_library(lwipcontribportwindows EXCLUDE_FROM_ALL ${lwipcontribportwindows_SRCS})

ports/win32/WindowsCMake/CMakeLists.txt

@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.8)
+
+project(lwip C)
+
+set(LWIP_CONTRIB_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../..)
+set(LWIP_DIR         ${CMAKE_CURRENT_SOURCE_DIR}/../../../../lwip)
+
+include(${LWIP_CONTRIB_DIR}/ports/CMakeCommon.cmake)
+
+add_definitions(-DLWIP_DEBUG)
+
+include_directories(
+    "${LWIP_CONTRIB_DIR}/../lwip/src/include"
+    "${LWIP_CONTRIB_DIR}/"
+    "${LWIP_CONTRIB_DIR}/ports/win32/include"
+    "${CMAKE_CURRENT_SOURCE_DIR}/"
+)
+
+add_subdirectory(../ win32port)
+link_libraries(lwipcontribportwindows)
+
+add_subdirectory(${LWIP_CONTRIB_DIR}/../lwip/src lwip)
+add_subdirectory(${LWIP_CONTRIB_DIR}/ contrib)
+
+add_executable(lwiptest ../test.c)
+target_link_libraries(lwiptest lwipcontribexamples lwipcontribapps lwipcontribaddons lwipcore lwipapps)