Patch for Cygwin support: use correct DSO/shared library prefix and

suffix.  Thanks to Marco Atzeri for reporting the issue and providing
an initial patch.

This commit was SVN r28059.

configure.ac

@@ -1123,8 +1123,13 @@ LT_INIT([dlopen win32-dll])
 # platforms, there didn't seem to be any harm in leaving in some of
 # them, alhtough I did remove some that we have never/will never
 # support, like OS/2).
+OPAL_DYN_LIB_PREFIX=lib
 case $host_os in
-cygwin* | mingw* | pw32* | cegcc*)
+cygwin*)
+    OPAL_DYN_LIB_PREFIX=cyg
+    OPAL_DYN_LIB_SUFFIX=dll
+    ;;
+mingw* | pw32* | cegcc*)
     OPAL_DYN_LIB_SUFFIX=dll
     ;;
 darwin* | rhapsody*)
@@ -1144,6 +1149,7 @@ hpux9* | hpux10* | hpux11*)
    OPAL_DYN_LIB_SUFFIX=so
    ;;
 esac
+AC_SUBST(OPAL_DYN_LIB_PREFIX)
 AC_SUBST(OPAL_DYN_LIB_SUFFIX)
 
 OPAL_SETUP_LIBLTDL

ompi/debuggers/Makefile.am

@@ -9,7 +9,7 @@
 #                         University of Stuttgart.  All rights reserved.
 # Copyright (c) 2004-2005 The Regents of the University of California.
 #                         All rights reserved.
-# Copyright (c) 2007-2010 Cisco Systems, Inc.  All rights reserved.
+# Copyright (c) 2007-2013 Cisco Systems, Inc.  All rights reserved.
 # $COPYRIGHT$
 # 
 # Additional copyrights may follow
@@ -58,9 +58,9 @@ libdebuggers_la_SOURCES = \
         $(headers) \
         ompi_debuggers.c
 libdebuggers_la_CPPFLAGS = \
-        -DOMPI_MSGQ_DLL=\"$(pkglibdir)/libompi_dbg_msgq.so\" \
+        -DOMPI_MSGQ_DLL=\"$(pkglibdir)/$(OPAL_DYN_LIB_PREFIX)ompi_dbg_msgq.$(OPAL_DYN_LIB_SUFFIX)\" \
-        -DOMPI_MSGQ_DLL_PREFIX=\"libompi_dbg_msgq\" \
+        -DOMPI_MSGQ_DLL_PREFIX=\"$(OPAL_DYN_LIB_PREFIX)ompi_dbg_msgq\" \
-        -DOMPI_MPIHANDLES_DLL_PREFIX=\"libompi_dbg_mpihandles\"
+        -DOMPI_MPIHANDLES_DLL_PREFIX=\"$(OPAL_DYN_LIB_PREFIX)ompi_dbg_mpihandles\"
 
 libompi_debugger_canary_la_SOURCES = \
         ompi_debugger_canary.c