fatal error: asm/errno.h: No such file or directory during bootstrap

[Xi Ruoyao]

On 2018-01-17 15:54 +0100, Georg-Johann Lay wrote:
> $ echo "#include <errno.h>" | gcc -xc - -H
> . /usr/include/errno.h
> .. /usr/include/features.h
> ... /usr/include/x86_64-linux-gnu/sys/cdefs.h
> .... /usr/include/x86_64-linux-gnu/bits/wordsize.h
> ... /usr/include/x86_64-linux-gnu/gnu/stubs.h
> .... /usr/include/x86_64-linux-gnu/gnu/stubs-64.h
> .. /usr/include/x86_64-linux-gnu/bits/errno.h
> ... /usr/include/linux/errno.h
> .... /usr/include/x86_64-linux-gnu/asm/errno.h
> ..... /usr/include/asm-generic/errno.h
> ...... /usr/include/asm-generic/errno-base.h
> 
> Any ideas?
> 
> For a "simple" build with
> ../../gcc.gnu.org/trunk/configure --prefix=/local/gnu/install/gcc-8-host 
> --enable-languages=c,c++ --enable-checking=release --disable-bootstrap 
> --build=x86_64-linux-gnu
> 
> the same occurs.
> 

Ubuntu 16.04 have "multiarch" directory.  For example <asm/errno.h> is
"/usr/include/x86_64-linux-gnu/asm/errno.h" on x86-64.  To make GCC recognize
it you need configuration option "--enable-multiarch".

-- 
Xi Ruoyao <ryxi@stu.xidian.edu.cn>
School of Aerospace Science and Technology, Xidian University