Repaste of https://bpaste.net/raw/435137b8eccc

gistfile1.txt

foo@foorcore mumble % master % /usr/lib64/qt5/bin/qmake -recursive main.pro CONFIG+="no-embed-qt-translations no-ice no-bonjour"
Reading /home/foo/nobackup/src/mumble/src/mumble_proto/mumble_proto.pro
Reading /home/foo/nobackup/src/mumble/3rdparty/celt-0.7.0-build/celt-0.7.0-build.pro
Reading /home/foo/nobackup/src/mumble/3rdparty/celt-0.11.0-build/celt-0.11.0-build.pro
Reading /home/foo/nobackup/src/mumble/3rdparty/opus-build/opus-build.pro
Reading /home/foo/nobackup/src/mumble/src/mumble/mumble.pro
Reading /home/foo/nobackup/src/mumble/plugins/plugins.pro
 Reading /home/foo/nobackup/src/mumble/plugins/link/link.pro
 Reading /home/foo/nobackup/src/mumble/plugins/manual/manual.pro
Reading /home/foo/nobackup/src/mumble/overlay_gl/overlay_gl.pro
Reading /home/foo/nobackup/src/mumble/src/murmur/murmur.pro

foo@foorcore mumble % master % make clean release
[...]
g++ -pipe -fvisibility=hidden -Wall -Wextra -Werror -isystem ../mumble_proto -isystem ../../3rdparty/celt-0.7.0-src/libcelt -O2 -pthread -Wall -W -D_REENTRANT -fPIC -DRESTRICT=__restrict__ -D_FORTIFY_SOURCE=2 -DMUMBLE_VERSION_STRING=1.3.0 -DMUMBLE -DNO_CRASH_REPORT -DUSE_OPUS -DUSE_ALSA -DUSE_OSS -DUSE_PORTAUDIO -DUSE_DBUS -DUSE_SPEECHD -DUSE_SPEECHD_PKGCONFIG -DUSE_G15 -DQT_NO_DEBUG -DQT_SVG_LIB -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_SQL_LIB -DQT_XML_LIB -DQT_DBUS_LIB -DQT_CORE_LIB -I. -I../../src -I. -I../mumble_proto -I../bonjour -I../../3rdparty/celt-0.7.0-src/libcelt -I/usr/lib/oss/include -isystem /usr/include/opus -isystem /usr/include/alsa -isystem /usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -isystem /usr/include/qt5 -isystem /usr/include/qt5/QtSvg -isystem /usr/include/qt5/QtWidgets -isystem /usr/include/qt5/QtGui -isystem /usr/include/qt5/QtNetwork -isystem /usr/include/qt5/QtSql -isystem /usr/include/qt5/QtXml -isystem /usr/include/qt5/QtDBus -isystem /usr/include/qt5/QtCore -Irelease -I. -I/usr/lib64/qt5/mkspecs/linux-g++ -x c++-header -c mumble_pch.hpp -o release/mumble.gch/c++

<command-line>:0:0: error: "_FORTIFY_SOURCE" redefined [-Werror]
<built-in>: note: this is the location of the previous definition

cc1plus: all warnings being treated as errors
Makefile.Release:660: recipe for target 'release/mumble.gch/c++' failed
make[2]: *** [release/mumble.gch/c++] Error 1
make[2]: Leaving directory '/home/foo/nobackup/src/mumble/src/mumble'
Makefile:38: recipe for target 'release' failed
make[1]: *** [release] Error 2
make[1]: Leaving directory '/home/foo/nobackup/src/mumble/src/mumble'
Makefile:529: recipe for target 'sub-src-mumble-release_ordered' failed
make: *** [sub-src-mumble-release_ordered] Error 2

Makefile.Release:660: recipe for target 'release/mumble.gch/c++' failed
make[2]: *** [release/mumble.gch/c++] Error 1
make[2]: Leaving directory '/home/foo/nobackup/src/mumble/src/mumble'