configury: use javac -h when javah cannot be used.

If javah is not present (it has been removed from Java 10) or
not usable (/usr/bin/javah symbolic link still exists on OS X), then
use javac -h instead of javah.

Refs. #5000

Signed-off-by: Gilles Gouaillardet <[email protected]>

Author: ggouaillardet

config/opal_setup_java.m4

@@ -15,7 +15,7 @@ dnl                         reserved.
 dnl Copyright (c) 2007-2012 Oracle and/or its affiliates.  All rights reserved.
 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 Copyright (c) 2015-2018 Research Organization for Information Science
 dnl                         and Technology (RIST). All rights reserved.
 dnl Copyright (c) 2017      FUJITSU LIMITED.  All rights reserved.
 dnl $COPYRIGHT$
@@ -37,7 +37,7 @@ AC_DEFUN([OPAL_SETUP_JAVA_BANNER],[
 AC_DEFUN([OPAL_SETUP_JAVA],[
     AC_REQUIRE([OPAL_SETUP_JAVA_BANNER])
 
-    OPAL_VAR_SCOPE_PUSH([opal_java_bad opal_java_found opal_java_dir opal_java_jnih opal_java_PATH_save opal_java_CPPFLAGS_save])
+    OPAL_VAR_SCOPE_PUSH([opal_java_bad opal_javah_happy opal_java_found opal_java_dir opal_java_jnih opal_java_PATH_save opal_java_CPPFLAGS_save])
     AC_ARG_ENABLE(java,
                   AC_HELP_STRING([--enable-java],
                                  [Enable Java-based support in the system - use this option to disable all Java-based compiler tests (default: enabled)]))
@@ -165,9 +165,12 @@ AC_DEFUN([OPAL_SETUP_JAVA],[
             AC_PATH_PROG(JAR, jar)
             AC_PATH_PROG(JAVADOC, javadoc)
             PATH=$opal_java_PATH_save
+            AS_IF([test -n "$JAVAH"],
+                  [AS_IF([$JAVAH -version > /dev/null 2>&1],
+                         [opal_javah_happy=yes])])
 
-            # Check to see if we have all 4 programs.
-            AS_IF([test -z "$JAVAC" || test -z "$JAVAH" || test -z "$JAR" || test -z "$JAVADOC"],
+            # Check to see if we have all 3 programs.
+            AS_IF([test -z "$JAVAC" || test -z "$JAR" || test -z "$JAVADOC"],
                   [opal_java_happy=no
                    HAVE_JAVA_SUPPORT=0],
                   [opal_java_happy=yes
@@ -216,5 +219,6 @@ AC_DEFUN([OPAL_SETUP_JAVA],[
 
     AC_DEFINE_UNQUOTED([OPAL_HAVE_JAVA_SUPPORT], [$HAVE_JAVA_SUPPORT], [do we have Java support])
     AM_CONDITIONAL(OPAL_HAVE_JAVA_SUPPORT, test "$opal_java_happy" = "yes")
+    AM_CONDITIONAL(OPAL_HAVE_JAVAH_SUPPORT, test "$opal_javah_happy" = "yes")
     OPAL_VAR_SCOPE_POP
 ])

ompi/mpi/java/java/Makefile.am

@@ -4,6 +4,8 @@
 # Copyright (c) 2015      Los Alamos National Security, LLC. All rights
 #                         reserved.
 # Copyright (c) 2017      FUJITSU LIMITED.  All rights reserved.
+# Copyright (c) 2018      Research Organization for Information Science
+#                         and Technology (RIST).  All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -148,11 +150,20 @@ mpi/MPI.class: $(JAVA_SRC_FILES)
 # Similar to above, all the generated .h files are dependent upon the
 # token mpi/MPI.class file.  Hence, all the classes will be generated
 # first, then we'll individually generate each of the .h files.
+
+if OPAL_HAVE_JAVAH_SUPPORT
 $(JAVA_H): mpi/MPI.class
 	$(OMPI_V_JAVAH) sourcename=mpi.`echo $@ | sed -e s/^mpi_// -e s/.h$$//`; \
 	CLASSPATH=. ; \
 	export CLASSPATH ; \
 	$(JAVAH) -d . -jni $$sourcename
+else
+$(JAVA_H): mpi/MPI.class
+	$(OMPI_V_JAVAC) sourcename=$(top_srcdir)/ompi/mpi/java/java/`echo $@ | sed -e s/^mpi_// -e s/.h$$//`.java; \
+	CLASSPATH=. ; \
+	export CLASSPATH ; \
+	$(JAVAC) -h . $$sourcename
+endif # OPAL_HAVE_JAVAH_SUPPORT
 
 # Generate the .jar file from all the class files.  List mpi/MPI.class
 # as a dependency so that it fires the rule above that will generate