java: Detect the path of javadoc in configure

Without this change, the directory of `javadoc` command must be
included in the `PATH` environment variable at `make`-time.
Paths of `javac`, `javah`, and `jar` commands are detected in
`configure`. So the path of `javadoc` also should be detected.

Signed-off-by: KAWASHIMA Takahiro <t-kawashima@jp.fujitsu.com>

config/opal_setup_java.m4

@@ -17,6 +17,7 @@ dnl Copyright (c) 2008-2013 Cisco Systems, Inc.  All rights reserved.
 dnl Copyright (c) 2013      Intel, Inc.  All rights reserved.
 dnl Copyright (c) 2015      Research Organization for Information Science
 dnl                         and Technology (RIST). All rights reserved.
+dnl Copyright (c) 2017      FUJITSU LIMITED.  All rights reserved.
 dnl $COPYRIGHT$
 dnl
 dnl Additional copyrights may follow
@@ -162,10 +163,11 @@ AC_DEFUN([OPAL_SETUP_JAVA],[
             AC_PATH_PROG(JAVAC, javac)
             AC_PATH_PROG(JAVAH, javah)
             AC_PATH_PROG(JAR, jar)
+            AC_PATH_PROG(JAVADOC, javadoc)
             PATH=$opal_java_PATH_save
 
-            # Check to see if we have all 3 programs.
-            AS_IF([test -z "$JAVAC" || test -z "$JAVAH" || test -z "$JAR"],
+            # Check to see if we have all 4 programs.
+            AS_IF([test -z "$JAVAC" || test -z "$JAVAH" || test -z "$JAR" || test -z "$JAVADOC"],
                   [opal_java_happy=no
                    HAVE_JAVA_SUPPORT=0],
                   [opal_java_happy=yes

ompi/mpi/java/java/Makefile.am

@@ -3,6 +3,7 @@
 # Copyright (c) 2011-2014 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2015      Los Alamos National Security, LLC. All rights
 #                         reserved.
+# Copyright (c) 2017      FUJITSU LIMITED.  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -179,7 +180,7 @@ jdoc: doc
 # mpi.jar is ever rebuilt, then also make the docs eligible to be
 # rebuilt.
 doc: mpi/MPI.class
-	$(OMPI_V_JAVADOC) javadoc $(OMPI_V_JAVADOC_QUIET) -d doc $(srcdir)/*.java
+	$(OMPI_V_JAVADOC) $(JAVADOC) $(OMPI_V_JAVADOC_QUIET) -d doc $(srcdir)/*.java
 	@touch doc
 
 jdoc-install: doc