Allow for spaces in path to java include directory and executables

For typical Windows installs of Java.
Also don't use cygpath on MinGW.

configure.ac

@@ -1108,6 +1108,7 @@ fi
 AC_MSG_CHECKING(for java include file jni.h)
 AC_ARG_WITH(javaincl, [  --with-javaincl=path    Set location of Java include directory], [JAVAINCDIR="$withval"], [JAVAINCDIR=])
 
+JAVAINC=""
 if test -z "$JAVAINCDIR" ; then
   JAVAINCDIR="/usr/j2sdk*/include /usr/local/j2sdk*/include /usr/jdk*/include /usr/local/jdk*/include /opt/j2sdk*/include /opt/jdk*/include /usr/java/include /usr/java/j2sdk*/include /usr/java/jdk*/include /usr/local/java/include /opt/java/include /usr/include/java /usr/local/include/java /usr/lib/java/include /usr/lib/jvm/java*/include /usr/lib64/jvm/java*/include /usr/include/kaffe /usr/local/include/kaffe /usr/include"
 
@@ -1117,30 +1118,33 @@ if test -z "$JAVAINCDIR" ; then
   *-*-darwin*) JAVAINCDIR="/System/Library/Frameworks/JavaVM.framework/Headers $JAVAINCDIR";;
   *);;
   esac
-fi
 
-JAVAINC=""
-for d in $JAVAINCDIR ; do
-  if test -r "$d/jni.h" ; then
-    AC_MSG_RESULT($d)
-    JAVAINCDIR=$d
-    JAVAINC=-I\"$d\"
-    break
+  for d in $JAVAINCDIR ; do
+    if test -r "$d/jni.h" ; then
+      JAVAINCDIR=$d
+      JAVAINC=-I\"$d\"
+      break
+    fi
+  done
+else
+  if test -r "$JAVAINCDIR/jni.h" ; then
+    JAVAINC=-I\"$JAVAINCDIR\"
   fi
-done
+fi
 
 if test "$JAVAINC" = "" ; then
   AC_MSG_RESULT(not found)
 else
+  AC_MSG_RESULT($JAVAINC)
   # now look for <arch>/jni_md.h
   AC_MSG_CHECKING(for java include file jni_md.h)
   JAVAMDDIR=`find "$JAVAINCDIR" -follow -name jni_md.h -print`
   if test "$JAVAMDDIR" = "" ; then
     AC_MSG_RESULT(not found)
   else
-    JAVAMDDIR=`dirname "$JAVAMDDIR" | tail -1`
-    JAVAINC="${JAVAINC} -I\"$JAVAMDDIR\""
+    JAVAMDDIR=-I\"`dirname "$JAVAMDDIR" | tail -1`\"
     AC_MSG_RESULT($JAVAMDDIR)
+    JAVAINC="${JAVAINC} ${JAVAMDDIR}"
   fi
 fi
 
@@ -1195,6 +1199,15 @@ case $host in
 esac
 fi
 
+# Quote for spaces in path to executables
+if test -n "$JAVA"; then
+  JAVA=\"$JAVA\"
+fi
+if test -n "$JAVAC"; then
+  JAVAC=\"$JAVAC\"
+fi
+
+
 AC_SUBST(JAVA)
 AC_SUBST(JAVAC)
 AC_SUBST(JAVAINC)
@@ -2669,13 +2682,18 @@ AC_SUBST(SKIP_ANDROID)
 ABS_SRCDIR=`(cd ${srcdir} && pwd)`
 
 # Root directory
-# Translate path for native Windows compilers for use with 'make check'
 ROOT_DIR=`pwd`
 case $host in
-*-*-cygwin* | *-*-mingw*)
+*-*-cygwin*)
+  # Translate path for native Windows compilers for use with 'make check'
   if (cygpath --mixed $ROOT_DIR) >/dev/null 2>/dev/null; then
     ROOT_DIR=`cygpath --mixed $ROOT_DIR`
   fi
+  ;;
+esac
+
+case $host in
+*-*-cygwin* | *-*-mingw*)
   # Extra files generated by some Windows compilers
   EXTRA_CLEAN="*.stackdump *.exp *.lib *.pdb *.ilk"
   ;;