[dkms-8188eu] fails to build on armv6

[migueldvb]

When I install dkms-8188eu on an armv6 raspberrypi I get the following error:

$this->bbcode_second_pass_code('', '1/1) reinstalling dkms-8188eu [###############################] 100%

If your kernel is >= 3.12 and comes with
rtlwifi driver you will have to blacklist
rtlwifi for this driver to work

Creating symlink /var/lib/dkms/8188eu/v4.1.4_6773/source ->
/usr/src/8188eu-v4.1.4_6773

DKMS: add completed.

Kernel preparation unnecessary for this kernel. Skipping...

Building module:
cleaning build area........
CONFIG_RTL8188EU=m make ARCH=arm CROSS_COMPILE= -C /usr/lib/modules/4.14.67-1-ARCH/build M=/var/lib/dkms/8188eu/v4.1.4_6773/build modules.................................(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.14.67-1-ARCH (armv6l)
Consult /var/lib/dkms/8188eu/v4.1.4_6773/build/make.log for more information.

Kernel preparation unnecessary for this kernel. Skipping...

Building module:
cleaning build area.......
CONFIG_RTL8188EU=m make ARCH=arm CROSS_COMPILE= -C /usr/lib/modules/4.14.67-1-ARCH/build M=/var/lib/dkms/8188eu/v4.1.4_6773/build modules..................(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.14.67-1-ARCH (armv6l)
Consult /var/lib/dkms/8188eu/v4.1.4_6773/build/make.log for more information.
modprobe: WARNING: Module 8188eu not found in directory /lib/modules/4.14.67-1-ARCH
error: command failed to execute correctly
:: Running post-transaction hooks...
(1/2) Install DKMS modules
==> dkms install 8188eu/v4.1.4_6773 -k 4.14.67-1-ARCH
Error! Bad return status for module build on kernel: 4.14.67-1-ARCH (armv6l)
Consult /var/lib/dkms/8188eu/v4.1.4_6773/build/make.log for more information.
(2/2) Arming ConditionNeedsUpdate...
')

This is the build log of the driver:

$this->bbcode_second_pass_code('', '
DKMS make.log for 8188eu-v4.1.4_6773 for kernel 4.14.67-1-ARCH (armv6l)
Wed Sep 5 21:21:04 UTC 2018
make: Entering directory '/usr/lib/modules/4.14.67-1-ARCH/build'
CC [M] /var/lib/dkms/8188eu/v4.1.4_6773/build/core/rtw_ap.o
In file included from /var/lib/dkms/8188eu/v4.1.4_6773/build/core/rtw_ap.c:22:
/var/lib/dkms/8188eu/v4.1.4_6773/build/include/osdep_service.h: In function 'thread_enter':
/var/lib/dkms/8188eu/v4.1.4_6773/build/include/osdep_service.h:287:2: error: implicit declaration of function 'allow_signal'; did you mean 'alloc_secdata'? [-Werror=implicit-function-declaration]
allow_signal(SIGTERM);
^~~~~~~~~~~~
alloc_secdata
/var/lib/dkms/8188eu/v4.1.4_6773/build/include/osdep_service.h: In function 'flush_signals_thread':
/var/lib/dkms/8188eu/v4.1.4_6773/build/include/osdep_service.h:292:6: error: implicit declaration of function 'signal_pending'; did you mean 'timer_pending'? [-Werror=implicit-function-declaration]
if (signal_pending (current))
^~~~~~~~~~~~~~
timer_pending
/var/lib/dkms/8188eu/v4.1.4_6773/build/include/osdep_service.h:293:3: error: implicit declaration of function 'flush_signals'; did you mean 'flush_bp_all'? [-Werror=implicit-function-declaration]
flush_signals(current);
^~~~~~~~~~~~~
flush_bp_all
cc1: some warnings being treated as errors
make[1]: *** [scripts/Makefile.build:329: /var/lib/dkms/8188eu/v4.1.4_6773/build/core/rtw_ap.o] Error 1
make: *** [Makefile:1523: _module_/var/lib/dkms/8188eu/v4.1.4_6773/build] Error 2
make: Leaving directory '/usr/lib/modules/4.14.67-1-ARCH/build'

')