Help needed with compilation

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Edit: I've got it sorted. It was just a silly typo. BTW source code comes from: C or C++ code for validating Bitcoin addresses

Hi

I'm trying to compile a C program that verifies correctness of a bitcoin address

#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <openssl/sha.h>

/* Based on libbase58, see https://github.com/luke-jr/libbase58 for reference.*/
/* Returns the version of a valid Bitcoin address or a negative value if the  */
/* address is invalid.                                                        */
int validate_bitcoin_address(const char *address) {
    static const int8_t b58digits_map[] = {
        -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
        -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
        -1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
        -1, 0, 1, 2, 3, 4, 5, 6,  7, 8,-1,-1,-1,-1,-1,-1,
        -1, 9,10,11,12,13,14,15, 16,-1,17,18,19,20,21,-1,
        22,23,24,25,26,27,28,29, 30,31,32,-1,-1,-1,-1,-1,
        -1,33,34,35,36,37,38,39, 40,41,42,43,-1,44,45,46,
        47,48,49,50,51,52,53,54, 55,56,57,-1,-1,-1,-1,-1,
    };

    unsigned char addrbin[25];
    size_t addrbinsz = sizeof(addrbin);

    void *bin = (void *) addrbin;
    size_t *binszp = &addrbinsz;
    const char *b58 = address;
    size_t b58sz = strlen(address);

    {
        const unsigned char *b58u = (void *) b58;
        unsigned char *binu = bin;
        uint32_t outi[(25 + 3) / 4];
        size_t outisz=(25 + 3) / 4;
        uint64_t t;
        uint32_t c;
        size_t i, j;
        uint8_t bytesleft = 25 % 4;
        uint32_t zeromask = bytesleft ? (0xffffffff << (bytesleft * 8)) : 0;
        unsigned zerocount = 0;

        if (!b58sz) b58sz = strlen(b58);
        memset(outi, 0, sizeof(outi));

        /* Leading zeros, just count */
        for (i = 0; i < b58sz && b58u[i] == '1'; ++i) ++zerocount;
        for ( ; i < b58sz; ++i) {
            if (b58u[i] & 0x80) return -1; /* High-bit set on invalid digit */
            if (b58digits_map[b58u[i]] == -1) return -2; /* Invalid base58 digit */
            
            c = (unsigned)b58digits_map[b58u[i]];
            for (j = outisz; j--; ) {
                t = ((uint64_t)outi[j]) * 58 + c;
                c = (t & 0x3f00000000) >> 32;
                outi[j] = t & 0xffffffff;
            }

            if (c) return -3; /* Output number too big (carry to the next int32) */
            if (outi[0] & zeromask) return -4; /* Output number too big (last int32 filled too far) */
        }

        j = 0;
        switch (bytesleft) {
            case 3: *(binu++) = (outi[0] &   0xff0000) >> 16;
            case 2: *(binu++) = (outi[0] &     0xff00) >>  8;
            case 1: *(binu++) = (outi[0] &       0xff);  ++j;
            default: break;
        }

        for (; j < outisz; ++j) {
            *(binu++) = (outi[j] >> 0x18) & 0xff;
            *(binu++) = (outi[j] >> 0x10) & 0xff;
            *(binu++) = (outi[j] >>    8) & 0xff;
            *(binu++) = (outi[j] >>    0) & 0xff;
        }

        binu = bin; /* Count canonical base58 byte count */
        for (i = 0; i < 25; ++i) {
            if (binu[i]) break;
            --*binszp;
        }
        *binszp += zerocount;
    }

    if (addrbinsz != 25) return -5;
    if (addrbin[0] != 0 && addrbin[0] != 5) return -6;

    {
        unsigned char d1[SHA256_DIGEST_LENGTH], d2[SHA256_DIGEST_LENGTH];
        SHA256(SHA256(addrbin, 21, d1), SHA256_DIGEST_LENGTH, d2);
        if (memcmp(addrbin + 21, d2, 4)) return -7;
    }

    return addrbin[0];
}

int main( int argc, char * argv [] ) {
    int i;

    for (i = 1; i < argc; ++i ) {
        bool valid = (validate_bitcoin_address(argv[i]) >= 0);
        printf( "%s is %s\n", argv[i], valid ? "VALID." : "INVALID!");
    }

    return 0;
}

What I get is this:

$ gcc -Wall veradd.c -o verify
/tmp/ccxAKGEq.o: In function `validate_bitcoin_address':
veradd.c:(.text+0x378): undefined reference to `SHA256'
veradd.c:(.text+0x392): undefined reference to `SHA256'
collect2: error: ld returned 1 exit status

or alternatively:

$ gcc -Wall veradd.c -o verify -lcrypto

compiles no bother but when I want to run this it looks like it doesn't start.
I had a look at GitHub - luke-jr/libbase58: C library for Bitcoin's base58 encoding where the source code is derived from and it said something about initialising a SHA256 but alas being complete noob I couldn't figure out how to make it work.
My settings:

$ uname -r; openssl version;gcc --version
4.4.16-1-lts
OpenSSL 1.0.2h  3 May 2016
gcc (GCC) 6.1.1 20160802