[lwip-devel] [bug #27324] DHCP_GLOBAL_XID_HEADER does not work with ARM Realview Compiler

[Bill Auerbach]

Follow-up Comment #4, bug #27324 (project lwip):

If you tried

#undef DHCP_GLOBAL_XID_HEADER
#ifdef DHCP_GLOBAL_XID_HEADER
#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation
prototypes */
#endif

and you get the error, it's a (serious) bug.  Lines other than #elif, #else
and #endif following false #if's are to be completely ignored until the
matching #endif is parsed.  I'm curious what:

#if 0
#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation
prototypes */
#endif

does.  As Simon suggested, you could also try something like:

#ifndef DHCP_GLOBAL_XID_HEADER
#define DHCP_GLOBAL_XID_HEADER <stdio.h>
#endif
#include DHCP_GLOBAL_XID_HEADER /* include optional starting XID generation
prototypes */

In any case, I think you've got something worth reporting to the Realview
people.  Perhaps reduce this to a one-file example to prove it out before
sending the report in.

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