Created attachment 6861 [details]
Compressed .config file

make[6]: Entering directory '/home/icenowy/sda9/buildroot/buildroot-2016.11.1/output/build/xserver_xorg-server-1.18.4/hw/xfree86/os-support/linux'
  CC       lnx_init.lo
In file included from lnx_init.c:33:0:
../../../../hw/xfree86/common/compiler.h: In function 'xf_outb':
../../../../hw/xfree86/common/compiler.h:770:5: error: implicit declaration of function 'outb' [-Werror=implicit-function-declaration]
     outb(val, port);
     ^
../../../../hw/xfree86/common/compiler.h:770:5: warning: nested extern declaration of 'outb' [-Wnested-externs]
../../../../hw/xfree86/common/compiler.h: In function 'xf_outw':
../../../../hw/xfree86/common/compiler.h:776:5: error: implicit declaration of function 'outw' [-Werror=implicit-function-declaration]
     outw(val, port);
     ^
../../../../hw/xfree86/common/compiler.h:776:5: warning: nested extern declaration of 'outw' [-Wnested-externs]
../../../../hw/xfree86/common/compiler.h: In function 'xf_outl':
../../../../hw/xfree86/common/compiler.h:782:5: error: implicit declaration of function 'outl' [-Werror=implicit-function-declaration]
     outl(val, port);
     ^
../../../../hw/xfree86/common/compiler.h:782:5: warning: nested extern declaration of 'outl' [-Wnested-externs]
cc1: some warnings being treated as errors