Comment 2 for bug 2061591

I fixed passing CPPFLAGS to the Makefile (dh_auto_build -- OPTS="$(CPPFLAGS) $(CFLAGS)"), but it is still failing:

```
make[1]: Entering directory '<<PKGBUILDDIR>>'
dh_auto_build -- OPTS="-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1"
        make -j4 "INSTALL=install --strip-program=true" "OPTS=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1"
make[2]: Entering directory '<<PKGBUILDDIR>>'
gcc -Iinclude -I/usr/include/xorg -I/usr/include/pixman-1 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1 -c src/capabilities.c -o obj/src/capabilities.o
gcc -Iinclude -I/usr/include/xorg -I/usr/include/pixman-1 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1 -c src/hwstate.c -o obj/src/hwstate.o
gcc -Iinclude -I/usr/include/xorg -I/usr/include/pixman-1 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1 -c src/mtstate.c -o obj/src/mtstate.o
gcc -Iinclude -I/usr/include/xorg -I/usr/include/pixman-1 -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1 -c src/memory.c -o obj/src/memory.o
src/hwstate.c: In function ‘finish_packet’:
src/hwstate.c:43:24: error: ‘const struct input_event’ has no member named ‘time’
   43 | s->evtime = syn->time.tv_usec / ms + syn->time.tv_sec * ms;
      | ^~
src/hwstate.c:43:49: error: ‘const struct input_event’ has no member named ‘time’
   43 | s->evtime = syn->time.tv_usec / ms + syn->time.tv_sec * ms;
      | ^~
make[2]: *** [Makefile:50: obj/src/hwstate.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory '<<PKGBUILDDIR>>'
dh_auto_build: error: make -j4 "INSTALL=install --strip-program=true" "OPTS=-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=3 -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-stack-clash-protection -fdebug-prefix-map=<<PKGBUILDDIR>>=/usr/src/xf86-input-multitouch-1.0~rc3-2ubuntu1" returned exit code 2
make[1]: *** [debian/rules:21: override_dh_auto_build] Error 25
make[1]: Leaving directory '<<PKGBUILDDIR>>'
```