C/C++ Compiler Invalidly Turning Warnings into Errors? - Realtek RTL8811AU USB WiFi

[Stephen Morris]

On 01/16/2015 08:38 AM, Stephen Morris wrote:
> On 01/15/2015 11:46 PM, poma wrote:
>> On 15.01.2015 08:50, Stephen Morris wrote:
>>> I have a driver for a wifi usb device that I need to compile because
>>> there are no drivers in the kernel, which has been obtained from the
>>> vendor of the device. When I attempt to compile the code the compile
>>> fails on the grounds that some warnings are being translated into
>>> errors. From my perspective these errors should not be happening
>>> because, when a debugging module wants to time stamp the build, that is
>>> not an error and is perfectly acceptable. How do I get the compiler to
>>> stop producing these errors. The messages I get are listed below.
>>>
>>> Authentication requested [root] for make driver:
>>> make ARCH=x86_64 CROSS_COMPILE= -C
>>> /lib/modules/3.17.8-300.fc21.x86_64/build
>>> M=/usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411 
>>>
>>> modules
>>> make[1]: Entering directory '/usr/src/kernels/3.17.8-300.fc21.x86_64'
>>>     CC [M]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_cmd.o 
>>>
>>>     CC [M]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_security.o 
>>>
>>>     CC [M]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.o 
>>>
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c: 
>>>
>>> In function ‘dump_drv_version’:
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:64: 
>>>
>>> error: macro "__DATE__" might prevent reproducible builds
>>> [-Werror=date-time]
>>>     DBG_871X_SEL_NL(sel, "build time: %s %s\n", __DATE__, __TIME__);
>>> ^
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:1: 
>>>
>>> error: macro "__TIME__" might prevent reproducible builds
>>> [-Werror=date-time]
>>>     DBG_871X_SEL_NL(sel, "build time: %s %s\n", __DATE__, __TIME__);
>>>    ^
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:1: 
>>>
>>> error: macro "__DATE__" might prevent reproducible builds
>>> [-Werror=date-time]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:1: 
>>>
>>> error: macro "__TIME__" might prevent reproducible builds
>>> [-Werror=date-time]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:1: 
>>>
>>> error: macro "__DATE__" might prevent reproducible builds
>>> [-Werror=date-time]
>>> /usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.c:66:1: 
>>>
>>> error: macro "__TIME__" might prevent reproducible builds
>>> [-Werror=date-time]
>>> cc1: some warnings being treated as errors
>>> scripts/Makefile.build:257: recipe for target
>>> '/usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.o' 
>>>
>>> failed
>>> make[2]: ***
>>> [/usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411/core/rtw_debug.o] 
>>>
>>> Error 1
>>> Makefile:1377: recipe for target
>>> '_module_/usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411' 
>>>
>>> failed
>>> make[1]: ***
>>> [_module_/usr/local/downloads/dlink/RTL8812AU_linux_v4.3.2_11100.20140411/driver/rtl8812AU_linux_v4.3.2_11100.20140411] 
>>>
>>> Error 2
>>> make[1]: Leaving directory '/usr/src/kernels/3.17.8-300.fc21.x86_64'
>>> Makefile:1350: recipe for target 'modules' failed
>>> make: *** [modules] Error 2
>>> ##################################################
>>> Compile make driver error: 2
>>> Please check error Mesg
>>> ##################################################
>>>
>>>
>>>
>> $ sed -i '/uninitialized/ i\EXTRA_CFLAGS += -Wno-error=date-time' 
>> Makefile
>>
>> If it crashes, try your luck with these:
>>
>> $ git clone https://github.com/gnab/rtl8812au.git
>> $ cd rtl8812au/
>> ...
>> $ git clone https://github.com/abperiasamy/rtl8812AU_8821AU_linux.git
>> $ cd rtl8812AU_8821AU_linux/
>> ...
>> $ make
>> $ su
>> # cp 8812au.ko /lib/modules/$(uname -r)/updates/
>> # depmod
>> # modprobe -v 8812au
> Thanks poma, I'll check these out. The git source might be better than 
> what I have at the moment as the vendor source I have seems to be 
> requiring kernel config parameters that appear to not be active in the 
> kernels I am using.
>>
I've compiled the code and after copying the compiled module and running 
the modprobe the device immediately connected. I'll run a few more tests 
and try a reboot to see if it still works successfully.
I am assuming that I will need to perform all these steps everytime the 
kernel is upgraded, would that be correct?
>
>
>

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