XCode 4.2 - Openssl build error - xcode

Question

I have successfully created the OpenSSL library for iPhone Simulator. I have successfully imported all the headers and libs. However, I am having problems in building the project and XCode tells me that there is an incomplete definition of a struct X509_ALGOR. Here is the code:
- (NSData *)encodePBEWithMD5AndDESData:(NSData *)inData password:(NSString *)password direction:(int)direction
{
// Change salt and number of iterations for your project !!!
static const char gSalt[] =
{
(unsigned char)0xaa, (unsigned char)0xd1, (unsigned char)0x3c, (unsigned char)0x31,
(unsigned char)0x53, (unsigned char)0xa2, (unsigned char)0xee, (unsigned char)0x05
};
unsigned char *salt = (unsigned char *)gSalt;
int saltLen = strlen(gSalt);
int iterations = 15;
EVP_CIPHER_CTX cipherCtx;
unsigned char *mResults; // allocated storage of results
int mResultsLen = 0;
const char *cPassword = [password UTF8String];
unsigned char *mData = (unsigned char *)[inData bytes];
int mDataLen = [inData length];
SSLeay_add_all_algorithms();
X509_ALGOR *algorithm = PKCS5_pbe_set(NID_pbeWithMD5AndDES_CBC,
iterations, salt, saltLen);
memset(&cipherCtx, 0, sizeof(cipherCtx));
if (algorithm != NULL)
{
EVP_CIPHER_CTX_init(&(cipherCtx));
**if (EVP_PBE_CipherInit(algorithm->algorithm, cPassword, strlen(cPassword),
algorithm->parameter, &(cipherCtx), direction))**
{
EVP_CIPHER_CTX_set_padding(&cipherCtx, 1);
int blockSize = EVP_CIPHER_CTX_block_size(&cipherCtx);
int allocLen = mDataLen + blockSize + 1; // plus 1 for null terminator on decrypt
mResults = (unsigned char *)OPENSSL_malloc(allocLen);
unsigned char *in_bytes = mData;
int inLen = mDataLen;
unsigned char *out_bytes = mResults;
int outLen = 0;
The pointer to struct X509_ALGOR, which is 'algorithm' is found to be incompletely defined. I don't have any clue about this. Can anyone help me please?
if (EVP_PBE_CipherInit(algorithm->algorithm, cPassword, strlen(cPassword),
algorithm->parameter, &(cipherCtx), direction))

Answer 1

I am not sure if it is appropriate to post answer to my own question. However, I am doing this if someone has the same problem, he/she may get some help from this.
The problem with the above mentioned code was the linker flags. Once I set the "-ObjC -load_all" in "Other Linker Flags" under "Build Settings", the problem was gone.
Regards.