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* [Bug build/27446] New: Do not unconditionally enable x86 ISA level
@ 2021-02-20 12:55 jengelh at inai dot de
  2021-03-01 14:54 ` [Bug build/27446] " schwab@linux-m68k.org
  0 siblings, 1 reply; 2+ messages in thread
From: jengelh at inai dot de @ 2021-02-20 12:55 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=27446

            Bug ID: 27446
           Summary: Do not unconditionally enable x86 ISA level
           Product: glibc
           Version: 2.33
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: jengelh at inai dot de
                CC: carlos at redhat dot com
  Target Milestone: ---

» uname -m
i686
» gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i586-suse-linux/10/lto-wrapper
Target: i586-suse-linux
...
» ld -v
GNU ld (GNU Binutils; openSUSE Tumbleweed) 2.35.1.20201112-1


glibc» ../configure CFLAGS="-O2" --prefix=/usr --host=i586-linux-gnu && make
...
checking for linker x86 ISA level support... yes
...


glibc» readelf -aW csu/abi-note.o | grep PROP
  GNU                  0x0000000c       NT_GNU_PROPERTY_TYPE_0       
Properties: <procesor-specific type 0xc0008002 data: 01 00 00 00 >

The presence of this property propagates to a fully-built glibc, which in turn
propagates to all programs subsequently built with such glibc.

libc.so.6 becomes unloadable, as e.g. reported on
https://lists.opensuse.org/archives/list/factory@lists.opensuse.org/thread/GTPAXHRFLUGFGFMQULYWHHEZJS67CB4Z/

It is my understanding that ISA_LEVEL was specified for the x86_64 psABI only,
so it should not even be emitted on ix86.

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* [Bug build/27446] Do not unconditionally enable x86 ISA level
  2021-02-20 12:55 [Bug build/27446] New: Do not unconditionally enable x86 ISA level jengelh at inai dot de
@ 2021-03-01 14:54 ` schwab@linux-m68k.org
  0 siblings, 0 replies; 2+ messages in thread
From: schwab@linux-m68k.org @ 2021-03-01 14:54 UTC (permalink / raw)
  To: glibc-bugs

https://sourceware.org/bugzilla/show_bug.cgi?id=27446

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
dup

*** This bug has been marked as a duplicate of bug 27318 ***

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