diff -Naur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2023-04-17 22:04:27.899870336 +0100
+++ b/CMakeLists.txt	2023-04-17 22:08:58.595166323 +0100
@@ -220,8 +220,13 @@
 	endif( )
 
 	if( BUILD64 )
-		set( CMAKE_CXX_FLAGS "-m64 ${CMAKE_CXX_FLAGS}" )
-		set( CMAKE_C_FLAGS "-m64 ${CMAKE_C_FLAGS}" )
+        	if(CMAKE_SYSTEM_PROCESSOR STREQUAL "riscv64")
+            		set( CMAKE_CXX_FLAGS "-pedantic -fpermissive ${CMAKE_CXX_FLAGS}" )
+            		set( CMAKE_C_FLAGS "-pedantic -fpermissive ${CMAKE_C_FLAGS}" )
+		else()
+			set( CMAKE_CXX_FLAGS "-m64 ${CMAKE_CXX_FLAGS}" )
+			set( CMAKE_C_FLAGS "-m64 ${CMAKE_C_FLAGS}" )
+		endif()
 	else( )
 		set( CMAKE_CXX_FLAGS "-m32 ${CMAKE_CXX_FLAGS}" )
 		set( CMAKE_C_FLAGS "-m32 ${CMAKE_C_FLAGS}" )