The tests are failing when libsoup-2.48.0 (and likely few earlier versions too) is in the buildroots.

[root@eagle gtest]# cat test-suite.log 
===============================================
   gupnp 0.20.12: tests/gtest/test-suite.log
===============================================

# TOTAL: 2
# PASS:  0
# SKIP:  0
# XFAIL: 0
# FAIL:  2
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

FAIL: test-context
==================

/context/http/ranged-requests: 
(/builddir/build/BUILD/gupnp-0.20.12/tests/gtest/.libs/lt-test-context:17221): GLib-GObject-WARNING **: The property SoupServer:port is deprecated and shouldn't be used anymore. It will be removed in a future version.

FAIL: test-bugs
===============

/bugs/696762: 
(/builddir/build/BUILD/gupnp-0.20.12/tests/gtest/.libs/lt-test-bugs:17241): GLib-GObject-WARNING **: The property SoupServer:port is deprecated and shouldn't be used anymore. It will be removed in a future version.



[root@eagle gtest]# export LD_LIBRARY_PATH=../../libgupnp/.libs/
[root@eagle gtest]# gdb .libs/test-bugs
GNU gdb (GDB) Fedora 7.8-25.fc22
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
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For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from .libs/test-bugs...done.
(gdb) run
Starting program: /builddir/build/BUILD/gupnp-0.20.12/tests/gtest/.libs/test-bugs 
Got object file from memory but can't read symbols: File truncated.
Missing separate debuginfos, use: debuginfo-install glibc-2.20.90-6.fc22.x86_64
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
/bugs/696762: 
(/builddir/build/BUILD/gupnp-0.20.12/tests/gtest/.libs/test-bugs:17868): GLib-GObject-WARNING **: The property SoupServer:port is deprecated and shouldn't be used anymore. It will be removed in a future version.

Program received signal SIGTRAP, Trace/breakpoint trap.
0x00007ffff6c18c60 in g_logv () from /usr/lib64/libglib-2.0.so.0
Missing separate debuginfos, use: debuginfo-install glib2-2.42.0-1.fc22.x86_64 gssdp-0.14.10-1.fc22.x86_64 libffi-3.1-6.fc22.x86_64 libselinux-2.3-5.fc22.x86_64 libsoup-2.48.0-1.fc22.x86_64 libuuid-2.25.1-1.fc22.x86_64 libxml2-2.9.1-5.fc22.x86_64 pcre-8.36-1.fc22.x86_64 sqlite-3.8.6-2.fc22.x86_64 xz-libs-5.1.2-15alpha.fc22.x86_64 zlib-1.2.8-7.fc22.x86_64
(gdb) where

+ Trace 234214