[lwip-devel] [bug #52899] Compile problem

[Carsten Frank]

URL:
  <http://savannah.nongnu.org/bugs/?52899>

                 Summary: Compile problem
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: carstenfrank
            Submitted on: Mon 15 Jan 2018 01:32:40 PM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None
            lwIP version: 2.0.3

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Details:

Code like:
   #if LWIP_VERSION >= 0x01050000
       bla bla bla
   #endif

Does not compile with 2.0.x.

Version 1.4 init.h (Works):
#define LWIP_VERSION   (LWIP_VERSION_MAJOR << 24   | LWIP_VERSION_MINOR << 16
| \
                        LWIP_VERSION_REVISION << 8 | LWIP_VERSION_RC)

Version 2.0.x init.h (compile problem):
/** Provides the version of the stack */
#define LWIP_VERSION   (((u32_t)LWIP_VERSION_MAJOR) << 24   |
((u32_t)LWIP_VERSION_MINOR) << 16 | \
                        ((u32_t)LWIP_VERSION_REVISION) << 8 |
((u32_t)LWIP_VERSION_RC))

Does not work because preprocessor does not know u32_t. Generally the
preprocessor can't work with type casts.



 




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