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Document PACK_STRUCT_USE_INCLUDES #define

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This commit is contained in:
Dirk Ziegelmeier 2017-01-01 12:31:02 +01:00
parent a2a16d4193
commit ee034bd811
1 changed files with 11 additions and 0 deletions
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11
src/include/lwip/arch.h
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@ -266,6 +266,17 @@ extern "C" {
#define PACK_STRUCT_FLD_S(x) PACK_STRUCT_FIELD(x)
#endif /* PACK_STRUCT_FLD_S */
/** Packed structs support using \#include files before and after struct to be packed.\n
* The file included BEFORE the struct is "arch/bpstruct.h".\n
* The file included AFTER the struct is "arch/epstruct.h".\n
* This can be used to implement struct packing on MS Visual C compilers, see
* the Win32 port in the lwIP contrib repository for reference.
* For examples of packed struct declarations, see include/lwip/prot/ subfolder.\n
* A port to GCC/clang is included in lwIP, if you use these compilers there is nothing to do here.
*/
#ifdef __DOXYGEN__
#define PACK_STRUCT_USE_INCLUDES
#endif
/** Eliminates compiler warning about unused arguments (GCC -Wextra -Wunused). */
#ifndef LWIP_UNUSED_ARG