Fix pmix configury so that libpmix is still emitted when --with-devel-headers is given, even under static builds

Signed-off-by: Ralph Castain <rhc@open-mpi.org>

opal/mca/pmix/pmix2x/pmix/src/Makefile.am

@@ -11,7 +11,7 @@
 #                         All rights reserved.
 # Copyright (c) 2006-2016 Cisco Systems, Inc.  All rights reserved.
 # Copyright (c) 2012-2013 Los Alamos National Security, Inc.  All rights reserved.
-# Copyright (c) 2013-2016 Intel, Inc. All rights reserved
+# Copyright (c) 2013-2017 Intel, Inc. All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -49,10 +49,22 @@ libpmix_la_LIBADD = \
 libpmix_la_DEPENDENCIES = $(libpmix_la_LIBADD)
 
 if PMIX_EMBEDDED_MODE
+
+if WANT_INSTALL_HEADERS
+
+# retain output of pmix library
+lib_LTLIBRARIES = libpmix.la
+libpmix_la_SOURCES = $(headers) $(sources)
+libpmix_la_LDFLAGS = -version-info $(libpmix_so_version)
+
+else
+
 noinst_LTLIBRARIES = libpmix.la
 libpmix_la_SOURCES = $(headers) $(sources)
 libpmix_la_LDFLAGS =
 
+endif
+
 else
 
 lib_LTLIBRARIES = libpmix.la