[Bug libc/21029] New: glibc-2.23 (and later) fails to compile with -fno-omit-frame-pointer on i386

["0xe2.0x9a.0x9b at gmail dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=21029

            Bug ID: 21029
           Summary: glibc-2.23 (and later) fails to compile with
                    -fno-omit-frame-pointer on i386
           Product: glibc
           Version: 2.23
            Status: UNCONFIRMED
          Severity: normal
          Priority: P1
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: 0xe2.0x9a.0x9b at gmail dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 9741
  --> https://sourceware.org/bugzilla/attachment.cgi?id=9741&action=edit
Gentoo build log: sys-libs:glibc-2.23-r3:20170106-093416.log

I am compiling all packages on my machines with -fno-omit-frame-pointer because
it enables debuggers and performance measurement tools (gdb, perf record,
valgrind memcheck, valgrind callgrind).

However, glibc-2.23 fails to compile on my system:

../sysdeps/unix/sysv/linux/posix_fallocate.c: In function 'posix_fallocate':
../sysdeps/unix/sysv/linux/posix_fallocate.c:39:1: error: bp cannot be used in
asm here

../sysdeps/unix/sysv/linux/posix_fallocate64.c: In function
'__posix_fallocate64_l64':
../sysdeps/unix/sysv/linux/posix_fallocate64.c:42:1: error: bp cannot be used
in asm here

This bug is most likely caused by sysdeps/unix/sysv/linux/i386/sysdep.h:570:

# define LOADREGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
        register unsigned int _a6 asm ("ebp") = (unsigned int) (arg6); \
        LOADREGS_5 (arg1, arg2, arg3, arg4, arg5)

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