autotools, CMake: add a comment.

We should have our own copies of the ONC RPC headers, rather than
relying on the OS to supply them.  We've already done that for most if
not all other protocols.

Author: guyharris

CMakeLists.txt

@@ -444,7 +444,12 @@ check_type_size("time_t" SIZEOF_TIME_T)
 cmake_pop_check_state()
 
 #
-# Header files.
+# Test for ONC RPC headers.
+#
+# XXX - we should supply copies of these, as I think Sun released them
+# under a sufficiently permissive license, and that would be one less
+# place where we rely on OS headers, rather than our own headers, for
+# a protocol that is specified independent of any particular OS.
 #
 check_include_file(rpc/rpc.h HAVE_RPC_RPC_H)
 if(HAVE_RPC_RPC_H)

configure.ac

@@ -30,7 +30,16 @@ if test "$ac_cv_prog_cc_c99" = "no"; then
 fi
 AC_LBL_C_INIT(V_CCOPT, V_INCLS)
 
+#
+# Test for ONC RPC headers.
+#
+# XXX - we should supply copies of these, as I think Sun released them
+# under a sufficiently permissive license, and that would be one less
+# place where we rely on OS headers, rather than our own headers, for
+# a protocol that is specified independent of any particular OS.
+#
 AC_CHECK_HEADERS(rpc/rpc.h rpc/rpcent.h)
+
 #
 # Get the size of a void *, to know whether this is a 32-bit or 64-bit build.
 #