build failure: xf86Opt.h:44:14: error: declaration does not declare anything

[bch <brad.harder%gmail.com@localhost>]

#   compile  kdump/kdump-ioctl.o
/usr/src/obj/tooldir.NetBSD-7.99.38-amd64/bin/x86_64--netbsd-gcc -O2
-fPIE    -std=gnu99    -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wpointer-arith -Wno-sign-compare  -Wno-traditional
-Wa,--fatal-warnings -Wreturn-type -Wswitch -Wshadow -Wcast-qual
-Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare
-Wold-style-definition -Wsign-compare -Wformat=2
-Wno-format-zero-length  -Werror
--sysroot=/usr/src/obj/destdir.amd64
-I/usr/src/obj/destdir.amd64/usr/X11R7/include/libdrm
-I/usr/src/obj/destdir.amd64/usr/X11R7/include/pixman-1
-I/usr/src/obj/destdir.amd64/usr/X11R7/include
-I/usr/src/external/cddl/osnet/sys
-I/usr/src/external/cddl/osnet/dist/uts/common -D_DEV_IC_BT8XX_H_
-D_ALTQ_ALTQ_JOBS_H_ -D_VIA_DRM_H_ -DQXL_DRM_H -D__R128_DRM_H__
-D__SIS_DRM_H__ -D__SAVAGE_DRM_H__ -D__RADEON_DRM_H__
-D__MACH64_DRM_H__ -D__MGA_DRM_H__ -I/usr/src/usr.bin/ktrace
-I/usr/src/sys -D_KERNTYPES  -c    kdump-ioctl.c
In file included from
/usr/obj/destdir.amd64/usr/include/prop/prop_object.h:38:0,
                 from /usr/obj/destdir.amd64/usr/include/prop/prop_array.h:35,
                 from /usr/obj/destdir.amd64/usr/include/prop/proplib.h:35,
                 from /usr/src/sys/sys/disk.h:91,
                 from kdump-ioctl.c:16:
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/xf86Opt.h:44:10:
error: two or more data types in declaration specifiers
     Bool bool;
          ^
In file included from
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/xf86str.h:43:0,
                 from
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/xf86.h:44,
                 from
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/xf86i2c.h:9,
                 from
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/bt829.h:4,
                 from kdump-ioctl.c:189:
/usr/src/obj/destdir.amd64/usr/X11R7/include/xorg/xf86Opt.h:44:14:
error: declaration does not declare anything [-Werror]
     Bool bool;
              ^
cc1: all warnings being treated as errors
*** [kdump-ioctl.o] Error code 1
nbmake[6]: stopped in /usr/src/usr.bin/kdump
1 error
nbmake[6]: stopped in /usr/src/usr.bin/kdump
*** [dependall] Error code 2
nbmake[5]: stopped in /usr/src/usr.bin/kdump
1 error
nbmake[5]: stopped in /usr/src/usr.bin/kdump
*** [dependall-kdump] Error code 2
nbmake[4]: stopped in /usr/src/usr.bin
1 error
nbmake[4]: stopped in /usr/src/usr.bin
*** [dependall-usr.bin] Error code 2
nbmake[3]: stopped in /usr/src
1 error
nbmake[3]: stopped in /usr/src
*** [do-build] Error code 2

nbmake[2]: stopped in /usr/src
1 error