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

[Stephen Morris <samorris@xxxxxxxxxxxxxxx>]

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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n:Morris;Stephen
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