$NetBSD: patch-build_config_SunOS-GCC,v 1.6 2018/02/06 11:41:14 jperkin Exp $

Resolve a conflict on SunOS, where GCC>=4.6 will force C99 with C++
and require _XOPEN_SOURCE=600, whereas GCC<4.6 will reject C99 with C++.
--- build/config/SunOS-GCC.orig	2015-08-04 05:20:55.000000000 +0000
+++ build/config/SunOS-GCC
@@ -21,6 +21,8 @@ LINK    = $(CXX)
 LIB     = ar -cr
 RANLIB  = ranlib
 SHLIB   = $(CXX) -shared -Wl,-soname,$(notdir $@) -o $@
+SHLIBFLAGS = $(LDFLAGS) -Wl,-rpath,$(POCO_PREFIX)/lib -L$(POCO_PREFIX)/lib \
+                $(foreach p,$(sort $(POCO_ADD_LIBRARY)),-L$(p) -Wl,-R$(p))
 SHLIBLN = $(POCO_BASE)/build/script/shlibln
 STRIP   = strip
 DEP     = $(POCO_BASE)/build/script/makedepend.gcc 
@@ -38,10 +40,10 @@ SHAREDLIBLINKEXT = .so
 #
 # Compiler and Linker Flags
 #
-CFLAGS          = 
+CFLAGS          = -D_XOPEN_SOURCE=$(XOPEN_SOURCE)
 CFLAGS32        =
 CFLAGS64        =
-CXXFLAGS        = -Wall -Wno-sign-compare
+CXXFLAGS        = -Wall -Wno-sign-compare -D_XOPEN_SOURCE=$(XOPEN_SOURCE)
 CXXFLAGS32      =
 CXXFLAGS64      =
 LINKFLAGS       =
@@ -52,7 +54,7 @@ STATICOPT_CXX   =
 STATICOPT_LINK  = -static
 SHAREDOPT_CC    = -fPIC
 SHAREDOPT_CXX   = -fPIC
-SHAREDOPT_LINK  = -Wl,-rpath,$(LIBPATH)
+SHAREDOPT_LINK  = -Wl,-rpath,$(POCO_PREFIX)/lib -L$(POCO_PREFIX)/lib -L$(LIBPATH)
 DEBUGOPT_CC     = -g -D_DEBUG
 DEBUGOPT_CXX    = -g -D_DEBUG
 DEBUGOPT_LINK   = -g
@@ -63,9 +65,9 @@ RELEASEOPT_LINK = -O2
 #
 # System Specific Flags
 #
-SYSFLAGS = -D_XOPEN_SOURCE=500 -D_REENTRANT -D_THREAD_SAFE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
+SYSFLAGS = -D_REENTRANT -D_THREAD_SAFE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE
 
 #
 # System Specific Libraries
 #
-SYSLIBS  = -lpthread -lrt -lxnet -lsocket -lnsl -lresolv -ldl
+SYSLIBS  = -lpthread -ldl -lrt -lxnet -lsocket -lnsl -lresolv -ldl