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arch.h: include <limits.h> if it exists (at least INT_MAX is used)

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(cherry picked from commit aff1935e40)
This commit is contained in:
goldsimon 2017-03-08 20:30:48 +01:00
parent 40fbd6bc24
commit c71c9882c2
1 changed files with 13 additions and 0 deletions
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13
src/include/lwip/arch.h
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@ -162,6 +162,19 @@ typedef uintptr_t mem_ptr_t;
#endif
#endif
/** Define this to 1 in arch/cc.h of your port if your compiler does not provide
* the limits.h header. You need to define the type limits yourself in this case
* (e.g. INT_MAX).
*/
#ifndef LWIP_NO_LIMITS_H
#define LWIP_NO_LIMITS_H 0
#endif
/* Include limits.h? */
#if !LWIP_NO_LIMITS_H
#include <limits.h>
#endif
/** C++ const_cast<target_type>(val) equivalent to remove constness from a value (GCC -Wcast-qual) */
#ifndef LWIP_CONST_CAST
#define LWIP_CONST_CAST(target_type, val) ((target_type)((ptrdiff_t)val))