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The RIOT-OS build does not use the same instructions as the linux build for wolfSSL. Configuration changes should be made in the user_settings.h header. You should add a define for `WOLFSSL_AES_COUNTER`.

https://github.com/RIOT-OS/RIOT/blob/ma … settings.h

Thanks,
Eric @ wolfSSL Support

I am trying to use wolfCrypt on RIOT OS for my IoT project. The current version of wolfCrypt on RIOT is 4.5.0. I followed the instructions:
    $ ./autogen.sh
    $ ./configure --enable-aesctr
    $ make
    $ make check   # (optional, but highly recommended)
    $ sudo make install
to enable AES-CTR. In the options.h, it shows that AES-CTR is enabled.
   #undef  WOLFSSL_AES_COUNTER
   #define WOLFSSL_AES_COUNTER

However, when I tried to compile my code on native board, it says:
   undefined reference to `wc_AesCtrEncrypt'
   collect2: error: ld returned 1 exit status

whereas I did include the "aes.h" in my main.c file:
  #include <stdio.h>
  #include <unistd.h>
  #include <wolfssl/options.h>
  #include <wolfssl/wolfcrypt/sha256.h>
  #include <wolfssl/wolfcrypt/random.h>
  #include <wolfssl/wolfcrypt/pwdbased.h>
  #include <wolfssl/wolfcrypt/aes.h>
  #include "xtimer.h"
  #include "log.h"

Also, Here is my Makefile:

APPLICATION = test_aes
BOARD ?= native
RIOTBASE ?= $(CURDIR)/../..
DEVELHELP ?= 1
QUIET ?= 1
CFLAGS += -DTHREAD_STACKSIZE_MAIN=2*THREAD_STACKSIZE_LARGE
USEPKG += wolfssl
USEMODULE += wolfcrypt_ecc
USEMODULE += wolfcrypt-test
USEMODULE += wolfcrypt_asn
USEMODULE += wolfcrypt_aes
USEMODULE += wolfcrypt
USEMODULE += wolfcrypt_random
USEMODULE += wolfcrypt_sha256
USEMODULE += wolfssl_dtls
USEMODULE += wolfcrypt_pwdbased
USEMODULE += gnrc_sock_check_reuse
USEMODULE += gnrc_sock_udp
USEMODULE += gnrc_ipv6
USEMODULE += xtimer

ifneq ($(BOARD),native)
  CFLAGS += -DBENCH_EMBEDDED
endif
TEST_ON_CI_WHITELIST += native
include $(RIOTBASE)/Makefile.include
---------------------------------------

My code works well for AES-CBC mode (wc_AesCbcEncrypt), but keeps saying: undefined reference to `wc_AesCtrEncrypt'. I got stucked here for several days and tried everything I could. Any advice would be helpful. Thank you.