cmake: enable build on riscv{64, 32}

tested on Arch Linux RISC-V.

CMakeLists.txt

@@ -325,6 +325,16 @@ if(ARCH_ID STREQUAL "s390x")
   set(S390X 1)
 endif()
 
+if(ARCH_ID STREQUAL "riscv64")
+set(RISCV   1)
+set(RISCV64 1)
+endif()
+
+if(ARCH_ID STREQUAL "riscv32")
+set(RISCV   1)
+set(RISCV32 1)
+endif()
+
 if(WIN32 OR ARM OR PPC64LE OR PPC64 OR PPC)
   set(OPT_FLAGS_RELEASE "-O2")
 else()
@@ -736,7 +746,7 @@ else()
     message(STATUS "AES support explicitly disabled")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DNO_AES")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNO_AES")
-  elseif(NOT ARM AND NOT PPC64LE AND NOT PPC64 AND NOT PPC AND NOT S390X)
+  elseif(NOT ARM AND NOT PPC64LE AND NOT PPC64 AND NOT PPC AND NOT S390X AND NOT RISCV)
     message(STATUS "AES support enabled")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -maes")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -maes")
@@ -744,6 +754,8 @@ else()
     message(STATUS "AES support not available on POWER")
   elseif(S390X)
     message(STATUS "AES support not available on s390x")
+  elseif(RISCV)
+    message(STATUS "AES support not available on RISC-V")
   elseif(ARM6)
     message(STATUS "AES support not available on ARMv6")
   elseif(ARM7)