Make javac and jni.h optional in ./configure

aclocal.m4

@@ -263,8 +263,23 @@ else
   AC_MSG_ERROR([The Java compiler $JAVAC failed (see config.log, check the CLASSPATH?)])
   echo "configure: failed program was:" >&AC_FD_CC
   cat $JAVA_TEST >&AC_FD_CC
+  ac_cv_prog_javac_works=no
 fi
 rm -f $JAVA_TEST $CLASS_TEST
 ])
 AC_PROVIDE([$0])dnl
 ])
+The Autoconf macros in this directory were copied from the GNU Autoconf Archive
+http://www.gnu.org/software/autoconf-archive/
+
+To use them, simply concatenate them all into the aclocal.m4 file in the
+project root directory:
+
+    cd batphone/jni/servald
+    cat m4/* >aclocal.m4
+
+Then you can run autoconf with no special arguments:
+
+    autoconf
+    ./configure
+    make

commandline.c

@@ -24,6 +24,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include <string.h>
 #include <time.h>
 #include <unistd.h>
+#include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #ifdef HAVE_JNI_H
@@ -91,6 +92,7 @@ int cli_usage() {
 
 
 #ifdef HAVE_JNI_H
+
 /* JNI entry point to command line.  See org.servalproject.servald.ServalD class for the Java side.
    JNI method descriptor: "([Ljava/lang/String;)Lorg/servalproject/servald/ServalDResult;"
 */
@@ -122,7 +124,8 @@ JNIEXPORT jobject JNICALL Java_org_servalproject_servald_ServalD_command(JNIEnv
   }
   return (*env)->NewObject(env, resultClass, resultConstructorId, status, outv);
 }
-#endif
+
+#endif /* HAVE_JNI_H */
 
 /* args[] excludes command name (unless hardlinks are used to use first words 
    of command sequences as alternate names of the command. */
@@ -218,6 +221,16 @@ int cli_arg(int argc, char **argv, command_line_option *o, char *argname, char *
   return 1;
 }
 
+int cli_printf(const char *fmt, ...)
+{
+  va_list ap,ap2;
+  va_start(ap,fmt);
+  va_copy(ap2,ap);
+  //vsnprintf(msg,8192,fmt,ap2);
+  va_end(ap);
+  return 0;
+}
+
 int app_dna_lookup(int argc,char **argv,struct command_line_option *o)
 {
   /* Create the instance directory if it does not yet exist */

configure.in

@@ -1,18 +1,25 @@
 dnl Process this file with autoconf to produce a configure script.
 AC_INIT(dna.c)
 
-dnl Checks for programs.
+dnl Check for programs.
 AC_PROG_CC
+
+dnl Check for a working Java compiler, keep going if unsuccessful.
+pushdef([AC_MSG_ERROR], defn([AC_MSG_WARN]))
 AC_PROG_JAVAC
+popdef([AC_MSG_ERROR])
+
+dnl Check for JNI includes, keep going if not present.
+pushdef([AC_MSG_ERROR], defn([AC_MSG_WARN]))
+AC_JNI_INCLUDE_DIR
+for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS; do
+  CFLAGS="$CFLAGS -I$JNI_INCLUDE_DIR"
+done
+popdef([AC_MSG_ERROR])
 
 AC_CHECK_LIB(c,srandomdev)
 
-AC_CHECK_HEADERS(stdio.h errno.h stdlib.h strings.h unistd.h string.h arpa/inet.h sys/socket.h sys/mman.h sys/time.h poll.h netdb.h linux/if.h linux/netlink.h linux/rtnetlink.h net/if.h netinet/in.h ifaddrs.h net/route.h signal.h portaudio.h)
+AC_CHECK_HEADERS(stdio.h errno.h stdlib.h strings.h unistd.h string.h arpa/inet.h sys/socket.h sys/mman.h sys/time.h poll.h netdb.h linux/if.h linux/netlink.h linux/rtnetlink.h net/if.h netinet/in.h ifaddrs.h net/route.h signal.h jni.h)
-
-dnl AC_JNI_INCLUDE_DIR
-dnl for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS; do
-dnl   CFLAGS="$CFLAGS -I$JNI_INCLUDE_DIR"
-dnl done
 
 echo "Fetching and building NaCl if required."
 echo "(this can take HOURS to build depending on your architecture,"

m4/ax_prog_javac_works.m4

@@ -65,6 +65,7 @@ else
   AC_MSG_ERROR([The Java compiler $JAVAC failed (see config.log, check the CLASSPATH?)])
   echo "configure: failed program was:" >&AC_FD_CC
   cat $JAVA_TEST >&AC_FD_CC
+  ac_cv_prog_javac_works=no
 fi
 rm -f $JAVA_TEST $CLASS_TEST
 ])