-----Original Message-----
From: Daniel Stenberg [mailto:daniel_at_haxx.se]
Sent: 10 March 2014 17:28
To: libcurl development
Subject: Re: libcurl linking problem

On Mon, 10 Mar 2014, Huw Gallon wrote:

> I am attempting to build a fairly simple application in gcc C (on
> Redhat Linux 6.3) which will use libcurl API functions to send email
> confirmation of various events and actions to other users on the same
> network. I am having difficulty building the application. I can
> compile the source into an object file but not link this into an
> application. The output from the build script is below (apologies for
> length.) The salient points are the unreferenced functions
> des_set_odd_parity, des_set_key and des_ecb_encrypt, and the
unreferenced type (presumably) __ctype_b.

__ctype_b is usually provided by the standard libc linker files.
Something odd is happening when you don't get that provided.

> DES_set_odd_parity, DES_set_key and DES_ecb_encrypt are all in
> libcrypto.so, but the case does not match those required by libcurl.

See lib/curl_html_core.c, the lower case versions are for OpenSSL 0.9.7
or later. Otherwise uppercase. It would hint that you have a mixed setup
where you compile with one version and link with another. Or something
like that.

> Calls may be recorded for quality, training and security purposes.

Good to know.

-- 
  / daniel.haxx.se
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Thanks for that information. I have found an implementation of __ctype_b
in a file named xlocale.h, but it doesn't get included in any build. I
may try overwriting my curl libraries etc with an earlier version (I had
some difficulty in installing all the packages required for the build
involving libcurl so there may well be a mixture of releases of ssl,
ssh, crypto etc. to deal with.) The file curl_html_core.c does not seem
to have been loaded.
In case of dire need, I could always write my own lowercase functions,
which would simply invoke the uppercase functions. Yes, a horrible fudge
I know, but if it gets me communicating ...
Huw Gallon 
 
 
 
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