make this build on SunOS/Solaris

external/unbound/CMakeLists.txt

@@ -44,7 +44,12 @@ endif ()
 
 set(RETSIGTYPE void)
 
+if(CMAKE_SYSTEM_NAME MATCHES "(SunOS|Solaris)")
+add_definitions(-D_XOPEN_SOURCE=600)
+else()
 add_definitions(-D_GNU_SOURCE)
+endif()
+add_definitions(-std=c99)
 
 option(USE_ECDSA "Use ECDSA algorithms" ON)
 option(USE_SHA2 "Enable SHA2 support" ON)

external/unbound/configure_checks.cmake

@@ -49,6 +49,11 @@ if (WIN32)
     iphlpapi
     ws2_32)
 endif ()
+if (CMAKE_SYSTEM_NAME MATCHES "(SunOS|Solaris)")
+  set(CMAKE_REQUIRED_LIBRARIES
+    socket
+    nsl)
+endif ()
 
 check_function_exists(_beginthreadex HAVE__BEGINTHREADEX)
 check_function_exists(arc4random HAVE_ARC4RANDOM)