FFS 8.1 won't compile on arch linux

[steve_dupuis]

Here's the error message from the make:

[arch8:steve] /home/steve/builds/FreeFileSync/Source
 747 20160523 103052 $ make
mkdir -p ../Obj/FFS_GCC_Make_Release/ffs/src/
g++ -std=c++14 -pipe -DWXINTL_NO_GETTEXT_MACRO -I../.. -I../../zenXml -include "zen/i18n.h" -include "zen/warn_static.h" -Wall -O3 -DNDEBUG `wx-config --cxxflags --debug=no` -DZEN_LINUX -pthread `pkg-config --cflags gtk+-2.0` -c algorithm.cpp -o ../Obj/FFS_GCC_Make_Release/ffs/src/algorithm.o
In file included from ../../zen/sys_error.h:13:0,
                 from ../../zen/file_error.h:13,
                 from fs/abstract.h:11,
                 from file_hierarchy.h:23,
                 from algorithm.h:11,
                 from algorithm.cpp:7:
../../zen/scope_guard.h:23:5: error: static assertion failed: check std::uncaught_exceptions support
     static_assert(__GNUC__ < 5 || (__GNUC__ == 5 && (__GNUC_MINOR__ < 3 || (__GNUC_MINOR__ == 3 && __GNUC_PATCHLEVEL__ <= 1))), "check std::uncaught_exceptions support");
     ^~~~~~~~~~~~~
Makefile:99: recipe for target '../Obj/FFS_GCC_Make_Release/ffs/src/algorithm.o' failed
make: *** [../Obj/FFS_GCC_Make_Release/ffs/src/algorithm.o] Error 1