Control: tag patch I think the problem here is not about making sflphone unbuildable, but unfortunate licensing of libgnutls28.
It has moved from LGPL2.1 to LGPL3, and thus became incompatible with any other GPLv2 code. Since ucomomn has so many reverse-dependencies, this essentially forces many packages out of the archive. I haven't done full analysis of all reverse-dependencies in the archive, but even if there are none it would be nice to keep libraries with a more compatible licenses, instead of more restricting ones. The patch to fix FTBFS against GnuTLS 2.6 is trivial, and is attached with this email. Please consider reverting and making libucommon build and link against GnuTLS 2.6. Regards, Dmitrijs.
diff -Nru ucommon-6.0.7/debian/control ucommon-6.0.7/debian/control --- ucommon-6.0.7/debian/control 2013-08-02 09:27:21.000000000 +0000 +++ ucommon-6.0.7/debian/control 2013-10-30 12:34:56.000000000 +0000 @@ -10,7 +11,7 @@ debhelper (>= 9~), dh-buildinfo, pkg-config, - libgnutls28-dev, + libgnutls-dev, d-shlibs (>= 0.45~), graphviz Build-Depends-Indep: doxygen-latex diff -Nru ucommon-6.0.7/debian/patches/fix-gnutls2.6.patch ucommon-6.0.7/debian/patches/fix-gnutls2.6.patch --- ucommon-6.0.7/debian/patches/fix-gnutls2.6.patch 1970-01-01 00:00:00.000000000 +0000 +++ ucommon-6.0.7/debian/patches/fix-gnutls2.6.patch 2013-10-30 12:35:21.000000000 +0000 @@ -0,0 +1,14 @@ +Description: Fix building ucommon against gnutls2.6. +Author: Dmitrijs Ledkovs <x...@ubuntu.com> + +--- ucommon-6.0.7.orig/gnutls/local.h ++++ ucommon-6.0.7/gnutls/local.h +@@ -37,7 +37,7 @@ class __LOCAL context : public secure + public: + ~context(); + +- unsigned int connect; ++ gnutls_connection_end_t connect; + gnutls_credentials_type_t xtype; + gnutls_certificate_credentials_t xcred; + gnutls_dh_params_t dh; diff -Nru ucommon-6.0.7/debian/patches/series ucommon-6.0.7/debian/patches/series --- ucommon-6.0.7/debian/patches/series 1970-01-01 00:00:00.000000000 +0000 +++ ucommon-6.0.7/debian/patches/series 2013-10-30 12:35:10.000000000 +0000 @@ -0,0 +1 @@ +fix-gnutls2.6.patch