Re: 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?




<<attachment: samorris.vcf>>-- 
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