DKMS make.log for fglrx-updates-core-15.201 for kernel 4.6.0-040600rc6-generic (x86_64)
Fri May  6 09:11:41 BST 2016
/usr/sbin/dkms: line 73: cd: /var/lib/dkms/fglrx/15.201/build: No such file or directory
AMD kernel module generator version 2.1
doing Makefile based build for kernel 2.6.x and higher
rm -rf *.c *.h *.o *.ko *.a .??* *.symvers
make -C /lib/modules/4.6.0-040600rc6-generic/build SUBDIRS=/var/lib/dkms/fglrx-updates-core/15.201/build/2.6.x modules
make[1]: Entering directory `/usr/src/linux-headers-4.6.0-040600rc6-generic'
Makefile:667: Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong not supported by compiler
  CC [M]  /var/lib/dkms/fglrx-updates-core/15.201/build/2.6.x/firegl_public.o
gcc: error: unrecognized command line option ‘-fstack-protector-strong’
make[2]: *** [/var/lib/dkms/fglrx-updates-core/15.201/build/2.6.x/firegl_public.o] Error 1
make[1]: *** [_module_/var/lib/dkms/fglrx-updates-core/15.201/build/2.6.x] Error 2
make[1]: Leaving directory `/usr/src/linux-headers-4.6.0-040600rc6-generic'
make: *** [kmod_build] Error 2
build failed with return value 2