build: Allow to build for riscv64

dtool/src/dtoolbase/dtool_platform.h

@@ -96,6 +96,9 @@
 #elif defined(__arm__)
 #define DTOOL_PLATFORM "linux_arm"
 
+#elif defined(__riscv)
+#define DTOOL_PLATFORM "linux_riscv"
+
 #elif defined(__ppc__)
 #define DTOOL_PLATFORM "linux_ppc"
 

makepanda/makepanda.py

@@ -1427,7 +1427,7 @@ def CompileCxx(obj,src,opts):
                 if optlevel >= 4 or target == "android":
                     cmd += " -fno-rtti"
 
-        if ('SSE2' in opts or not PkgSkip("SSE2")) and not arch.startswith("arm") and arch != 'aarch64':
+        if ('SSE2' in opts or not PkgSkip("SSE2")) and arch.find('86') > 0:
             if GetTarget() != "emscripten":
                 cmd += " -msse2"