Hi. I'm trying to build for TL-WR841N v11 and I get compilation error:

...
mips-openwrt-linux-musl-gcc -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls -fno-common -ffreestanding -fhonour-copts -mabi=32 -march=mips32r2 -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap -D_LZMA_PROB32 -DCONFIG_KERNEL_CMDLINE='"board=TL-WR941ND  console=ttyS0,115200"' -DCONFIG_FLASH_OFFS=0x22000 -DCONFIG_FLASH_MAX=0 -DCONFIG_BOARD_TL_WR941ND -D__ASSEMBLY__ -c -o head.o head.S
head.S:16:21: fatal error: asm/asm.h: No such file or directory
compilation terminated.
Makefile:83: recipe for target 'head.o' failed
make[7]: *** [head.o] Error 1
...

I've tried to rebuild it with make -k1 V=s but same error.

Here is my config - http://pastebin.com/raw/J1Mbp0KA
And full log - http://pastebin.com/gU4CAfuN

I'm building on lubuntu 16.04. Any help would be great, thanks.