cmake: Fail if Libmultiprocess is missing when WITH_MULTIPROCESS=ON

Author: hebasto

CMakeLists.txt

@@ -143,8 +143,8 @@ cmake_dependent_option(WITH_DBUS "Enable DBus support." ON "CMAKE_SYSTEM_NAME ST
 
 option(WITH_MULTIPROCESS "Build multiprocess bitcoin-node and bitcoin-gui executables in addition to monolithic bitcoind and bitcoin-qt executables. Requires libmultiprocess library. Experimental." OFF)
 if(WITH_MULTIPROCESS)
-  find_package(Libmultiprocess COMPONENTS Lib)
-  find_package(LibmultiprocessNative COMPONENTS Bin
+  find_package(Libmultiprocess REQUIRED COMPONENTS Lib)
+  find_package(LibmultiprocessNative REQUIRED COMPONENTS Bin
     NAMES Libmultiprocess
   )
 endif()