start SSL

CMakeLists.txt

@@ -62,6 +62,7 @@ check_function_exists(pselect HAVE_PSELECT)
 check_function_exists(ppoll HAVE_PPOLL)
 check_include_file(linux/serial.h HAVE_LINUX_SERIAL -DHAVE_LINUX_SERIAL=1)
 check_include_file(dev/usb/uftdiio.h HAVE_FREEBSD_UFTDI -DHAVE_FREEBSD_UFTDI=1)
+
 check_function_exists(argp_parse HAVE_ARGP)
 if(NOT HAVE_ARGP)
   find_library(LIB_ARGP argp)
@@ -77,11 +78,13 @@ if(NOT coverage STREQUAL OFF)
   link_libraries(gcov)
   message(STATUS "coverage enabled")
 endif(NOT coverage STREQUAL OFF)
+
 option(contrib "disable inclusion of contributed sources." ON)
 if(contrib STREQUAL ON)
   set(HAVE_CONTRIB ON)
   message(STATUS "contrib enabled")
 endif(contrib STREQUAL ON)
+
 find_library(HAVE_MQTT mosquitto)
 if(HAVE_MQTT)
   option(mqtt "disable support for MQTT handling." ON)
@@ -90,7 +93,23 @@ if(HAVE_MQTT)
   else(mqtt STREQUAL ON)
     unset(HAVE_MQTT)
   endif(mqtt STREQUAL ON)
-endif(HAVE_MQTT) 
+endif(HAVE_MQTT)
+
+find_library(HAVE_SSL ssl)
+find_library(LIB_CRYPTO crypto)
+if(HAVE_SSL)
+  if(LIB_CRYPTO)
+    option(ssl "disable support for SSL." ON)
+    if(ssl STREQUAL ON)
+      message(STATUS "SSL enabled")
+      set(CMAKE_REQUIRED_LIBRARIES "${CMAKE_REQUIRED_LIBRARIES} ${HAVE_SSL} ${LIB_CRYPTO}")
+    else(ssl STREQUAL ON)
+      unset(HAVE_SSL)
+    endif(ssl STREQUAL ON)
+  else(LIB_CRYPTO)
+    message(FATAL_ERROR "crypto library not available")
+  endif(LIB_CRYPTO)
+endif(HAVE_SSL)
 
 check_cxx_source_runs("
 #include <stdint.h>