Building Beignet git revision 8dfec54e2f3e32710702ed60f5171741360f28bb on Fedora 24 x86_64 with

$ gcc --version
gcc (GCC) 6.1.1 20160427 (Red Hat 6.1.1-1)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ g++ --version
g++ (GCC) 6.1.1 20160427 (Red Hat 6.1.1-1)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

results in

$ make -j1
[  0%] Building CXX object backend/src/CMakeFiles/gbeinterp.dir/gbe_bin_interpreter.cpp.o
In file included from /home/vedranm/workspace/beignet/backend/src/./ir/instruction.hpp:28:0,
                 from /home/vedranm/workspace/beignet/backend/src/./backend/context.hpp:23,
                 from /home/vedranm/workspace/beignet/backend/src/backend/program.hpp:29,
                 from /home/vedranm/workspace/beignet/backend/src/backend/program.cpp:26,
                 from /home/vedranm/workspace/beignet/backend/src/gbe_bin_interpreter.cpp:30:
/home/vedranm/workspace/beignet/backend/src/./ir/immediate.hpp:346:31: error: flexible array member in union
       const Immediate *immVec[];
                               ^
backend/src/CMakeFiles/gbeinterp.dir/build.make:62: recipe for target 'backend/src/CMakeFiles/gbeinterp.dir/gbe_bin_interpreter.cpp.o' failed
make[2]: *** [backend/src/CMakeFiles/gbeinterp.dir/gbe_bin_interpreter.cpp.o] Error 1
CMakeFiles/Makefile2:127: recipe for target 'backend/src/CMakeFiles/gbeinterp.dir/all' failed
make[1]: *** [backend/src/CMakeFiles/gbeinterp.dir/all] Error 2
Makefile:149: recipe for target 'all' failed
make: *** [all] Error 2

There might be more errors. It would be nice if Beignet could be built with GCC 6.1.1 and newer.