Re-instantiated the pack directives. Nested structs do break individual field natural...

[pes-rpp/rpp-lwip.git] / doc / sys_arch.txt

diff --git a/doc/sys_arch.txt b/doc/sys_arch.txt
index 9f2a999a0d20c8ed950c900438f5dfe752fd572f..95d0add737a9c185549e5a9ed719cba88c99cd9e 100644 (file)
--- a/doc/sys_arch.txt
+++ b/doc/sys_arch.txt
@@ -154,6 +154,12 @@ cc.h       - Architecture environment, some compiler specific, some
   Typedefs for the types used by lwip -
     u8_t, s8_t, u16_t, s16_t, u32_t, s32_t, mem_ptr_t
 
+  Compiler hints for packing lwip's structures -
+    PACK_STRUCT_FIELD(x)
+    PACK_STRUCT_STRUCT
+    PACK_STRUCT_BEGIN
+    PACK_STRUCT_END
+
   Platform specific diagnostic output -
     LWIP_PLATFORM_DIAG(x)    - non-fatal, print a message.
     LWIP_PLATFORM_ASSERT(x)  - fatal, print message and abandon execution.