Merge pull request rbenv#934 from aycabta/gmake-is-required-for-jruby

GNU Make is always required for JRuby on FreeBSD

Author: hsbt

bin/ruby-build

@@ -1212,8 +1212,16 @@ if "${CC:-cc}" -x c /dev/null -E -Wno-error=shorten-64-to-32 &>/dev/null; then
 fi
 
 if [ -z "$MAKE" ]; then
-  if [ "FreeBSD" = "$(uname -s)" ] && [ "$(uname -r | sed 's/[^[:digit:]].*//')" -lt 10 ]; then
-    export MAKE="gmake"
+  if [ "FreeBSD" = "$(uname -s)" ]; then
+    if [ $(echo $1 | sed 's/-.*$//') = "jruby" ]; then
+      export MAKE="gmake"
+    else
+      if [ "$(uname -r | sed 's/[^[:digit:]].*//')" -lt 10 ]; then
+	export MAKE="gmake"
+      else
+	export MAKE="make"
+      fi
+    fi
   else
     export MAKE="make"
   fi