[...]

FindOptionValue(local->options, "Mode");
       ^
acecad.c:494:9: error: implicit declaration of function 'RemoveEnabledDevice'; did you mean 'xf86RemoveEnabledDevice'? [-Werror=implicit-function-declaration]
         RemoveEnabledDevice (local->fd);
         ^~~~~~~~~~~~~~~~~~~
         xf86RemoveEnabledDevice
acecad.c:494:9: warning: nested extern declaration of 'RemoveEnabledDevice' [-Wnested-externs]
At top level:
acecad.c:1075:1: warning: 'ReverseConvertProc' defined but not used [-Wunused-function]
 ReverseConvertProc (InputInfoPtr local,
 ^~~~~~~~~~~~~~~~~~
acecad.c: In function 'USBReadInput':
acecad.c:1037:21: warning: 'report_y' may be used uninitialized in this function [-Wmaybe-uninitialized]
                     xf86PostProximityEvent(local->dev, 0, 0, 3, report_x, report_y, z);
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
acecad.c:1037:21: warning: 'report_x' may be used uninitialized in this function [-Wmaybe-uninitialized]
cc1: some warnings being treated as errors
make[2]: *** [Makefile:460: acecad.lo] Error 1
make[2]: Leaving directory '/tmp/B.qM49yV/BUILD/xf86-input-acecad-1.5.0/src'
make[1]: *** [Makefile:438: all-recursive] Error 1
make[1]: Leaving directory '/tmp/B.qM49yV/BUILD/xf86-input-acecad-1.5.0'
make: *** [Makefile:370: all] Error 2
error: Bad exit status from /tmp/B.qM49yV/BUILD/tmp/rpm-tmp.92725 (%build)
RPM build errors:
    Bad exit status from /tmp/B.qM49yV/BUILD/tmp/rpm-tmp.92725 (%build)
ended at: Sun Apr 15 01:03:55 2018, done in 0:00:07.689543
error: No files produced.
mesg: ttyname failed: Inappropriate ioctl for device
+ chmod -R u+rwX /tmp/B.qM49yV/BUILD
+ rm -rf /tmp/B.qM49yV/tmp /tmp/B.qM49yV/BUILD
mesg: ttyname failed: Inappropriate ioctl for device
+ rm -rf /tmp/B.qM49yV
Begin-TLD-Builder-Info
Build-Time: user:6.16s sys:0.74s real:8.54s (faults io:7 non-io:553921)
End-TLD-Builder-Info