gstlal: fix search for pygobject lib on macs

gstlal/configure.ac

@@ -256,15 +256,20 @@ AC_SUBST([PYGOBJECT_LIBS])
 
 # on Debian the file is /usr/lib/x86_64-linux-gnu/libpython2.7.so
 # on SL7 the file is /usr/lib64/libpython2.7.so
+AC_SUBST([PYTHON_ABI_FLAGS], [])
+AC_SUBST([PYTHON_LIB_SUFFIX], [so])
 if test -a "/usr/lib/x86_64-linux-gnu/libpython2.7.so" ; then
 	AC_SUBST([PYTHON_LIB_LOC], [/usr/lib/x86_64-linux-gnu])
 elif test -a "/usr/lib64/libpython2.7.so" ; then
 	AC_SUBST([PYTHON_LIB_LOC], [/usr/lib64])
+elif test -a "/opt/local/lib/libpython2.7.dylib" ; then
+	AC_SUBST([PYTHON_LIB_LOC], [/opt/local/lib])
+	AC_SUBST([PYTHON_LIB_SUFFIX], [dylib])
+	# FIXME:  .pc file broken on macs, remove when fixed
+	PYGOBJECT_LIBS="${PYGOBJECT_LIBS} -lgmodule-2.0"
 else
 	AC_MSG_ERROR([libpython2.7.so not found])
 fi
-AC_SUBST([PYTHON_ABI_FLAGS], [])
-AC_SUBST([PYTHON_LIB_SUFFIX], [so])
 
 
 #