[sane-devel] bug report: ptal configure check

[David Paschal]

Hi, Walter.  Thanks for pointing this out.  In the past several people
reported a similar problem, but I never knew that it was because of
a missing "-lcrypto" linkage.  This "shouldn't" be necessary, because
libptal already has this linkage, but perhaps the order is wrong for
certain situations between "-lcrypto" and "-lsnmp'.

In any case, try upgrading to the recently released hpoj-0.90 (see
http://hpoj.sourceforge.net), which now has its own SANE backend
that is better suited to HP multi-function peripherals.

(If you have any further questions about the hpoj software, post/reply
to the hpoj-devel mailing list.  You don't have to be subscribed to
that list.)

David

Walter Hofmann wrote:
> I noticed that the configure check for ptal in sane-backends-1.0.7 fails
> with the following error:
> 
> wh@aragorn:~/tmp/libsane$ gcc -o conftest -g -O2 -W -Wall 
> -D_GNU_SOURCE -I/usr/local/include  -L/usr/local/lib conftest.c -lptal
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `EVP_DigestInit'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `EVP_DigestFinal'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `EVP_md5'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `HMAC'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `EVP_sha1'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `des_cbc_encrypt'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `des_key_sched'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `EVP_DigestUpdate'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `RAND_bytes'
> /usr/lib/libsnmp-0.4.2.so: undefined reference to `des_ncbc_encrypt'
> collect2: ld returned 1 exit status
> 
> wh@aragorn:~/tmp/libsane$ gcc -o conftest -g -O2 -W -Wall  -D_GNU_SOURCE
> -I/usr/local/include  -L/usr/local/lib conftest.c -lptal -lcrypto
> 
> 
> libptal is /usr/lib/libptal.so.0.1 from the Debian hpoj 0.8-11 package.
> 
> As you can see, adding -lcrypto solves the problem.
...
> NB. I only subscribed to post this bug report and I will unsubscribe in
> a second. Please mail me privately if you need anything else.=