cst-3.3.1 back_end-hsm链接器错误问题如何解决？

当按照最近发布的 NXP CST 3.3.1 包的指示构建后端 HSM 源代码时，我收到以下错误（请注意我在已成功构建的 libfrontend.a 中复制的目录列表中）：

osboxes@osboxes:~/cst-3.3.1/code/back_end-hsm/src$ make clean
$ARCH is []
rm -f backend.o config.o e_hsm.o e_hsm_err.o openssl_helper.o *~ core tags *.bak Makefile.bak libbackend.*
osboxes@osboxes:~/cst-3.3.1/code/back_end-hsm/src$ ls -al
total 680
drwxr-xr-x 3 osboxes osboxes   4096 Sep 20 22:46 .
drwxr-xr-x 4 osboxes osboxes   4096 Aug 14 08:53 ..
-rwxr-xr-x 1 osboxes osboxes  38775 Aug 14 08:56 backend.c
-rwxr-xr-x 1 osboxes osboxes   3874 Aug 14 08:56 config.c
-rwxr-xr-x 1 osboxes osboxes  51093 Aug 14 08:56 e_hsm.c
-rwxr-xr-x 1 osboxes osboxes   8670 Aug 14 08:56 e_hsm_err.c
drwxr-xr-x 2 osboxes osboxes   4096 Aug 14 08:53 include
-rwxr-xr-x 1 osboxes osboxes  96914 Sep 20 22:46 lib
-rw-rw-r-- 1 osboxes osboxes 437150 Sep 20 13:25 libfrontend.a
-rwxr-xr-x 1 osboxes osboxes   1937 Sep 20 22:22 Makefile
-rw-r--r-- 1 osboxes osboxes  12288 Sep 20 22:22 .Makefile.swp
-rwxr-xr-x 1 osboxes osboxes   4197 Aug 14 08:56 openssl_helper.c
-rw------- 1 osboxes osboxes  12288 Sep 20 21:34 .swp
osboxes@osboxes:~/cst-3.3.1/code/back_end-hsm/src$ make
$ARCH is []
[Compile] backend.c
[Compile] config.c
[Compile] e_hsm.c
[Compile] e_hsm_err.c
[Compile] openssl_helper.c
[Link (Static) libbackend]
osboxes@osboxes:~/cst-3.3.1/code/back_end-hsm/src$ make all
$ARCH is []
gcc   -std=c99  -D_POSIX_C_SOURCE=200809L -Wall -Werror -g -Wall -o cst  libfrontend.a libbackend.a -L./lib  -I/../openssl/include -mno-ms-bitfields -L/../openssl/lib -lssl -lcrypto -ldl -lpthread -lconfig -fno-builtin -fno-strict-aliasing -fno-common -DREMOVE_ENCRYPTION -Wl,--allow-multiple-definition
/usr/bin/ld: libfrontend.a(csf_cmd_ins_key.o): in function `cmd_handler_installcsfk':
/home/osboxes/cst-3.3.1/code/cst/code/obj.linux64/../../code/front_end/src/csf_cmd_ins_key.c:741: undefined reference to `get_der_encoded_certificate_data'
/usr/bin/ld: libfrontend.a(csf_cmd_ins_key.o): in function `cmd_handler_installnocak':
/home/osboxes/cst-3.3.1/code/cst/code/obj.linux64/../../code/front_end/src/csf_cmd_ins_key.c:847: undefined reference to `get_der_encoded_certificate_data'
/usr/bin/ld: libfrontend.a(csf_cmd_ins_key.o): in function `cmd_handler_installkey':
/home/osboxes/cst-3.3.1/code/cst/code/obj.linux64/../../code/front_end/src/csf_cmd_ins_key.c:992: undefined reference to `get_der_encoded_certificate_data'
collect2: error: ld returned 1 exit status
make: *** [Makefile:77: all] Error 1
  
我不确定首先应该如何链接 get_der_encoded_certificate_data。在back_end-engine源码中，backend.c中有这个函数，但是在back_end-hsm backend.c中，没有。如果我错过了一步，你能告诉我吗？