All library options are defined in Header/user_settings.h.
The memory map is located in the linker file in linker.ld.
Entry point function is reset_handler in retarget.c.
The RTC and RNG hardware interface needs implemented for real production applications in retarget.c

Building

Make sure you have gcc-arm-none-eabi installed.
Modify the Makefile to point to correct TOOLCHAIN_DIR.
Use make and it will build both targets as .elf and .hex in /Build.

Example:

   text	   data	    bss	    dec	    hex   filename
  50076	   2508	     44	  52628	   cd94   ./Build/WolfCryptTest.elf

   text	   data	    bss	    dec	    hex   filename
  39155	   2508	     60	  41723	   a2fb   ./Build/WolfCryptBench.elf

Performace Tuning Options

DEBUG_WOLFSSL: Undefine this to disable debug logging.
NO_INLINE: Disabling inline function saves about 1KB, but is slower.
WOLFSSL_SMALL_STACK: Enables stack reduction techniques to allocate stack sections over 100 bytes from heap.
USE_FAST_MATH: Uses stack based math, which is faster than the heap based math.
ECC_SHAMIR: Doubles heap usage, but slightly faster
RSA_LOW_MEM: Half as much memory but twice as slow. Uses Non-CRT method for private key. AES GCM: GCM_SMALL, GCM_WORD32 or GCM_TABLE: Tunes performance and flash/memory usage.
CURVED25519_SMALL: Enables small versions of Ed/Curve (FE/GE math).
USE_SLOW_SHA: Enables smaller/slower version of SHA.
USE_SLOW_SHA2: Over twice as small, but 50% slower
FP_MAX_BITS: Is the maximum math size (key size * 2). Used only with USE_FAST_MATH.
USE_CERT_BUFFERS_1024 or USE_CERT_BUFFERS_2048: Size of RSA certs / keys to test with.