dahdi-tools-2.10.0-2.fc22 fails to build in F22 due stricter GCC 5:

gcc -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches  -m64 -mtune=generic -I. -Ixtalk -Wall -Werror   -c -o mpptalk.o mpptalk.c
gcc -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches  -m64 -mtune=generic -I. -Ixtalk -Wall -Werror   -c -o xtalk/xtalk.o xtalk/xtalk.c
gcc -O2 -g -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches  -m64 -mtune=generic -I. -Ixtalk -Wall -Werror   -c -o xtalk/xusb.o xtalk/xusb.c
xpp_blink syntax OK
mpptalk.c: In function 'mpp_send_seg':
mpptalk.c:515:28: error: logical not is only applied to the left hand side of comparison [-Werror=logical-not-parentheses]
  if(!astribank->burn_state == BURN_STATE_STARTED) {
                            ^

Difference between working and failing build root:

Removed packages:
	cpp-4.9.2
	file-5.20
	file-libs-5.20
	gcc-4.9.2
	gcc-c++-4.9.2
	gdb-7.8.50.20150108
	libgcc-4.9.2
	libgomp-4.9.2
	libstdc++-4.9.2
	libstdc++-devel-4.9.2
	patch-2.7.3
	perl-Encode-2.68
	perl-Getopt-Long-2.42
	perl-HTTP-Tiny-0.053
	perl-Pod-Simple-3.28
	setup-2.9.4
	shared-mime-info-1.3
Added packages:
	cpp-5.0.0
	file-5.22
	file-libs-5.22
	gcc-5.0.0
	gcc-c++-5.0.0
	gdb-7.8.90.20150202
	isl-0.14
	libgcc-5.0.0
	libgomp-5.0.0
	libstdc++-5.0.0
	libstdc++-devel-5.0.0
	patch-2.7.4
	perl-Encode-2.70
	perl-Getopt-Long-2.43
	perl-HTTP-Tiny-0.054
	perl-Pod-Simple-3.29
	setup-2.9.5
	shared-mime-info-1.4