minimal-examples/raw/minimal-raw-proxy-fallback/CMakeLists.txt

   1 cmake_minimum_required(VERSION 2.8)
   2 include(CheckCSourceCompiles)
   3
   4 set(SAMP lws-minimal-raw-proxy-fallback)
   5 set(SRCS minimal-raw-proxy-fallback.c)
   6
   7 # NOTE... if you are building this standalone, you must point LWS_PLUGINS_DIR
   8 # to the lws plugins dir so it can pick up the plugin source.  Eg,
   9 # cmake . -DLWS_PLUGINS_DIR=~/libwebsockets/plugins
  10
  11 # If we are being built as part of lws, confirm current build config supports
  12 # reqconfig, else skip building ourselves.
  13 #
  14 # If we are being built externally, confirm installed lws was configured to
  15 # support reqconfig, else error out with a helpful message about the problem.
  16 #
  17 MACRO(require_lws_config reqconfig _val result)
  18
  19         if (DEFINED ${reqconfig})
  20         if (${reqconfig})
  21                 set (rq 1)
  22         else()
  23                 set (rq 0)
  24         endif()
  25         else()
  26                 set(rq 0)
  27         endif()
  28
  29         if (${_val} EQUAL ${rq})
  30                 set(SAME 1)
  31         else()
  32                 set(SAME 0)
  33         endif()
  34
  35         if (LWS_WITH_MINIMAL_EXAMPLES AND NOT ${SAME})
  36                 if (${_val})
  37                         message("${SAMP}: skipping as lws being built without ${reqconfig}")
  38                 else()
  39                         message("${SAMP}: skipping as lws built with ${reqconfig}")
  40                 endif()
  41                 set(${result} 0)
  42         else()
  43                 if (LWS_WITH_MINIMAL_EXAMPLES)
  44                         set(MET ${SAME})
  45                 else()
  46                         CHECK_C_SOURCE_COMPILES("#include <libwebsockets.h>\nint main(void) {\n#if defined(${reqconfig})\n return 0;\n#else\n fail;\n#endif\n return 0;\n}\n" HAS_${reqconfig})
  47                         if (NOT DEFINED HAS_${reqconfig} OR NOT HAS_${reqconfig})
  48                                 set(HAS_${reqconfig} 0)
  49                         else()
  50                                 set(HAS_${reqconfig} 1)
  51                         endif()
  52                         if ((HAS_${reqconfig} AND ${_val}) OR (NOT HAS_${reqconfig} AND NOT ${_val}))
  53                                 set(MET 1)
  54                         else()
  55                                 set(MET 0)
  56                         endif()
  57                 endif()
  58                 if (NOT MET)
  59                         if (${_val})
  60                                 message(FATAL_ERROR "This project requires lws must have been configured with ${reqconfig}")
  61                         else()
  62                                 message(FATAL_ERROR "Lws configuration of ${reqconfig} is incompatible with this project")
  63                         endif()
  64                 endif()
  65         endif()
  66 ENDMACRO()
  67
  68 set(requirements 1)
  69 require_lws_config(LWS_ROLE_RAW_PROXY 1 requirements)
  70
  71 if (requirements)
  72         add_executable(${SAMP} ${SRCS})
  73
  74         if (LWS_PLUGINS_DIR)
  75                 include_directories(${LWS_PLUGINS_DIR})
  76         endif()
  77
  78         if (websockets_shared)
  79                 target_link_libraries(${SAMP} websockets_shared)
  80                 add_dependencies(${SAMP} websockets_shared)
  81         else()
  82                 target_link_libraries(${SAMP} websockets)
  83         endif()
  84 endif()