Problem with compilation - unused function 'bitc_openssl_lock_fun'

[gustawdaniel]

After make i obtained the following error:

 CC    apps/bitc-cli/main.c
apps/bitc-cli/main.c:363:1: error: unused function 'bitc_openssl_lock_fun'
      [-Werror,-Wunused-function]
bitc_openssl_lock_fun(int mode,
^
apps/bitc-cli/main.c:387:1: error: unused function
      'bitc_openssl_thread_id_fun' [-Werror,-Wunused-function]
bitc_openssl_thread_id_fun(void)
^
2 errors generated.
Makefile:117: recipe for target 'bld/apps/bitc-cli/main.o' failed
make: *** [bld/apps/bitc-cli/main.o] Error 1

Additional info

arch
x86_64

lsb_release -a | grep Description
Description:	Ubuntu 16.04.3 LTS

[xxxserxxx]

If you remove the -Werror from CFLAGS in the Makefile, it gets further but still vomits with a bunch of errors in base58.c. There are numerous notes (which I've stripped) about forward declarations and some other warnings, but the errors all seem to be in base58.c

core/base58.c:70:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bn58;
          ^
core/base58.c:71:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bnc;
          ^
core/base58.c:72:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bn;
          ^
core/base58.c:76:4: warning: implicit declaration of function 'BN_init' is invalid in C99 [-Wimplicit-function-declaration]
   BN_init(&bn58);
   ^
core/base58.c:243:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bn58;
          ^
/usr/include/openssl/ossl_typ.h:80:16: note: forward declaration of 'struct bignum_st'
typedef struct bignum_st BIGNUM;
               ^
core/base58.c:244:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bn0;
          ^
/usr/include/openssl/ossl_typ.h:80:16: note: forward declaration of 'struct bignum_st'
typedef struct bignum_st BIGNUM;
               ^
core/base58.c:245:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM bn;
          ^
core/base58.c:246:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM div0;
          ^
core/base58.c:247:11: error: variable has incomplete type 'BIGNUM' (aka 'struct bignum_st')
   BIGNUM rem;
          ^