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

[Stephen Morris]

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.
>

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