LWIP_DECLARE_MEMORY_ALIGNED macro

Allocates a memory buffer of specified size that is of sufficient size to align its start address using LWIP_MEM_ALIGN. You can declare your own version here e.g. to enforce alignment without adding trailing padding bytes (see LWIP_MEM_ALIGN_BUFFER) or your own section placement requirements.\n e.g. if you use gcc and need 32 bit alignment:\n \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u8_t variable_name[size] \_\_attribute\_\_((aligned(4)))\n or more portable:\n \#define LWIP_DECLARE_MEMORY_ALIGNED(variable_name, size) u32_t variable_name[(size + sizeof(u32_t) - 1) / sizeof(u32_t)]