Compiler warning C4022 when building OpenSSL 0.9.8e On Windows

I got the following compiler error when building OpenSSL-0.9.8e in Windows environments with Visual studio 2005:

.\apps\enc.c(380) : error C2220: warning treated as error - no ‘object’ file generated
.\apps\enc.c(380) : warning C4022: ‘BIO_ctrl’ : pointer mismatch for actual parameter 4

Here is the quick fix to solve this compile error:

Open file .\apps\enc.c,Go to line 380:

if (BIO_read_filename(in,inf <= 0))
{
	perror(inf);
	goto end;
}

 Change it to

if (BIO_read_filename(in,(char*)(inf <= 0)))
{
	perror(inf);
	goto end;
}

you can download the compiled binary here.

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TAGS: c4022, compile, openssl, Windows

Posted on August 25th, 2007 in Programming, Windows