autogen: patch config/ltmain.sh in order to make NAG compiler pass the -pthread option to the linker

autogen.pl

@@ -901,10 +901,15 @@ sub patch_autotools_output {
     # enough Libtool that dosn't need this patch.  But don't alarm the
     # user and make them think that autogen failed if this patch fails --
     # make the errors be silent.
+    # Also patch ltmain.sh for NAG compiler
     if (-f "config/ltmain.sh") {
         verbose "$indent_str"."Patching PGI compiler version numbers in ltmain.sh\n";
         system("$patch_prog -N -p0 < $topdir/config/ltmain_pgi_tp.diff >/dev/null 2>&1");
         unlink("config/ltmain.sh.rej");
+
+        verbose "$indent_str"."Patching \"-pthread\" option for NAG compiler in ltmain.sh\n";
+        system("$patch_prog -N -p0 < $topdir/config/ltmain_nag_pthread.diff >/dev/null 2>&1");
+        unlink("config/ltmain.sh.rej");
     }
 
     # If there's no configure script, there's nothing else to do.

config/Makefile.am

@@ -13,6 +13,8 @@
 # Copyright (c) 2010      Oracle and/or its affiliates.  All rights
 #                         reserved.
 # Copyright (c) 2014-2015 Intel, Inc. All rights reserved.
+# Copyright (c) 2016      Research Organization for Information Science
+#                         and Technology (RIST). All rights reserved.
 # $COPYRIGHT$
 #
 # Additional copyrights may follow
@@ -23,6 +25,7 @@
 EXTRA_DIST = \
         distscript.sh \
         opal_get_version.m4sh \
+        ltmain_nag_pthread.diff \
         ltmain_pgi_tp.diff \
         opal_mca_priority_sort.pl \
         find_common_syms

config/ltmain_nag_pthread.diff

@@ -0,0 +1,18 @@
+--- config/ltmain.sh
++++ config/ltmain.sh
+@@ -6417,8 +6417,14 @@
+ 	func_source "$lib"
+ 
+ 	# Convert "-framework foo" to "foo.ltframework"
++        # and "-pthread" to "-Wl,-pthread" if NAG compiler
+ 	if test -n "$inherited_linker_flags"; then
+-	  tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g'`
++          case "$CC" in
++            nagfor*)
++	      tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g' | $SED 's/-pthread/-Wl,-pthread'`;;
++            *)
++	      tmp_inherited_linker_flags=`$ECHO "$inherited_linker_flags" | $SED 's/-framework \([^ $]*\)/\1.ltframework/g'`;;
++          esac
+ 	  for tmp_inherited_linker_flag in $tmp_inherited_linker_flags; do
+ 	    case " $new_inherited_linker_flags " in
+ 	      *" $tmp_inherited_linker_flag "*) ;;