minimal-examples/crypto/minimal-crypto-jwe/CMakeLists.txt

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