make/autoconf/build-aux/config.guess

rev 49266 : 8199138: Add RISC-V support to Zero
Reviewed-by: aph, erikj, ehelin

@@ -25,10 +25,17 @@
 # This is a wrapper for the config.guess from autoconf. The latter does not
 # properly detect 64 bit systems on all platforms. Instead of patching the
 # autoconf system (which might easily get lost in a future update), we wrap it
 # and fix the broken property, if needed.
 
+machine=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
+if test $machine = riscv64; then
+  # This is all we need to know for riscv64
+  echo riscv64-unknown-linux-gnu
+  exit
+fi
+
 DIR=`dirname $0`
 OUT=`. $DIR/autoconf-config.guess`
 
 # Test and fix solaris on x86_64
 echo $OUT | grep i386-pc-solaris > /dev/null 2> /dev/null