Public bug reported:
Binary package hint: curl
I'm packaging a library (libsword) which uses libcurl.
When I compile my package dpkg-shlibdeps gives me these
warnings that dependency on the following libraries (there are others but they
are irrelevant for this report) could be avoided:
libgcrypt.so.11
libtasn1.so.3
libidn.so.11
libldap_r-2.4.so.2
liblber-2.4.so.2
librt.so.1
libgnutls.so.26
libgssapi_krb5.so.2
I started investigating and found that upstream is using `curl-config --libs` to
figure out link flags. On my system it gives this:
$ curl-config --libs
-lcurl -lidn -llber -lldap -lrt -lgssapi_krb5 -lgssapi_krb5 -lz -lgnutls
(No clue why gssapi_krb5 appears twice anyhow...)
I thought that's a bit harsh if I want to link against curl I don't quite
understand why I have to recursively link against all that....
So to double check I've looked at the pc file shipped with curl:
$ cat /usr/lib/pkgconfig/libcurl.pc | grep Libs
Libs: -L${libdir} -lcurl
Libs.private: -lidn -llber -lldap -lrt -lgssapi_krb5 -lgssapi_krb5 -lz -lgnutls
This got me puzzled. The output from curl-config matches the static-linking
instructions from .pc file.
So I went to look into the curl-config code to see if it is possible to get
output which matches the "Libs:" standza of the pc file (edited $cat
/usr/bin/curl-config):
--libs)
if test "Xyes" = "Xyes"; then
echo ${CURLLIBDIR}-lcurl -lidn -llber -lldap -lrt -lgssapi_krb5
-lgssapi_krb5 -lz -lgnutls
else
echo ${CURLLIBDIR}-lcurl
fi
;;
--static-libs)
echo ${exec_prefix}/lib/libcurl.a -lidn -llber -lldap -lrt
-lgssapi_krb5 -lgssapi_krb5 -lz -lgnutls
;;
*)
The else condition is never executed so the output always has all those extra
libs.
So if upstream is using curl-config extra libraries are linked and
dpkg-shlibdeps yells at packagers.
If upstream is using libcurl.pc just -lcurl is linked and dpkg-shlibdeps is not
shouting.
IMHO this is a bug in curl-config. If it's not I'll try to figure out how to
switch upstream of my package to use pkg-config for curl.
ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
Package: libcurl4-gnutls-dev 7.18.2-8ubuntu4
ProcEnviron:
PATH=(custom, user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
SourcePackage: curl
Uname: Linux 2.6.30-020630rc5-generic i686
** Affects: curl (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386
--
curl-config --libs gives too many libraries
https://bugs.launchpad.net/bugs/379533
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