Bug#871946: libc6-dev-x32: The package libc6-dev-x32 lacks required include files

[Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>]

Package: libc6-dev-x32
Version: 2.24-11+deb9u1
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

I was trying to compile a program for the x32 ABI.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Create a program test-errno.c:
#include <stdio.h>
#include <errno.h>

int main(void)
{
        printf("Hello World: %d\n", errno);
        return 0;
}

Compile it with "gcc-6 -mx32 test-errno.c"

   * What was the outcome of this action?

I get this error:
In file included from /usr/include/bits/errno.h:24:0,
                 from /usr/include/errno.h:35,
                 from test-errno.c:2:
/usr/include/linux/errno.h:1:23: fatal error: asm/errno.h: Adresář nebo soubor
neexistuje
 #include <asm/errno.h>
                       ^
compilation terminated.

   * What outcome did you expect instead?

The package libc6-dev-x32 should contain all the include files needed to build
programs for the x32 ABI.
The package seems to be missing the directory /usr/include/x86_64-linux-gnux32.
When I create this directory and copy include files to it, the compilation
succeeds.



-- System Information:
Debian Release: 9.1
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, arm64, armel, armhf, mips, mips64el, ppc64el, s390x

Kernel: Linux 4.4.80 (SMP w/12 CPU cores; PREEMPT)
Locale: LANG=cs_CZ.utf8, LC_CTYPE=cs_CZ.utf8 (charmap=UTF-8), LANGUAGE=cs_CZ.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages libc6-dev-x32 depends on:
ii  libc6-dev       2.24-11+deb9u1
ii  libc6-dev-i386  2.24-11+deb9u1
ii  libc6-x32       2.24-11+deb9u1

libc6-dev-x32 recommends no packages.

libc6-dev-x32 suggests no packages.

-- no debconf information