riscv(misc): add support in Makefile

Makefile

@@ -100,6 +100,7 @@ FILES_JITLIB= bc.lua bcsave.lua dump.lua p.lua v.lua zone.lua \
 	      dis_arm64be.lua dis_ppc.lua dis_mips.lua dis_mipsel.lua \
 	      dis_mips64.lua dis_mips64el.lua \
 	      dis_mips64r6.lua dis_mips64r6el.lua \
+	      dis_riscv.lua dis_riscv64.lua \
 	      vmdef.lua
 
 ifeq (,$(findstring Windows,$(OS)))

src/Makefile

@@ -52,6 +52,7 @@ CCOPT_arm=
 CCOPT_arm64=
 CCOPT_ppc=
 CCOPT_mips=
+CCOPT_riscv64=
 #
 #CCDEBUG=
 # Uncomment the next line to generate debug information:
@@ -269,6 +270,9 @@ ifneq (,$(findstring LJ_TARGET_MIPS ,$(TARGET_TESTARCH)))
   else
     TARGET_LJARCH= mips
   endif
+else
+ifneq (,$(findstring LJ_TARGET_RISCV64 ,$(TARGET_TESTARCH)))
+    TARGET_LJARCH= riscv64
 else
   $(error Unsupported target architecture)
 endif
@@ -278,6 +282,7 @@ endif
 endif
 endif
 endif
+endif
 
 ifneq (,$(findstring LJ_TARGET_PS3 1,$(TARGET_TESTARCH)))
   TARGET_SYS= PS3
@@ -481,6 +486,9 @@ ifeq (ppc,$(TARGET_LJARCH))
     DASM_AFLAGS+= -D ELFV2
   endif
 endif
+ifneq (,$(findstring LJ_TARGET_RISCV64 ,$(TARGET_TESTARCH)))
+  DASM_AFLAGS+= -D RISCV64
+endif
 endif
 endif