Hi!
On 2022-02-10T05:55:15-0800, "H.J. Lu via Gcc-patches"
<gcc-patches@gcc.gnu.org> wrote:
> 1. Require linker with GNU_PROPERTY_1_NEEDED support for PR 35513
> run-time tests.
Moving my x86_64-pc-linux-gnu testing from an old to a newish system
(Ubuntu 20.04), I notice:
[-PASS: g++.target/i386/pr35513-1.C -std=gnu++98 (test for excess errors)-]
[-PASS:-]{+UNSUPPORTED:+} g++.target/i386/pr35513-1.C
-std=gnu++98[-execution test-]
Etc.
[-PASS: g++.target/i386/pr35513-2.C -std=gnu++98 (test for excess errors)-]
[-PASS:-]{+UNSUPPORTED:+} g++.target/i386/pr35513-2.C
-std=gnu++98[-execution test-]
Etc.
..., due to the 'property_1_needed' effective-target check now
diagnosing:
/usr/bin/ld: warning: /tmp/ccFNkvfI.o: unsupported GNU_PROPERTY_TYPE (5)
type: 0xb0008000
..., with:
$ /usr/bin/ld --version | head -n 1
GNU ld (GNU Binutils for Ubuntu) 2.34
I'm not familiar with these properties, but I wonder if really some
support has been removed (so that this indeed is now UNSUPPORTED), or if
something's wrong somewhere (so that this should still PASS).
For reference:
> --- a/gcc/testsuite/lib/target-supports.exp
> +++ b/gcc/testsuite/lib/target-supports.exp
> +proc check_effective_target_property_1_needed { } {
> + return [check_no_compiler_messages_nocache property_1_needed executable {
> +/* Assembly code */
> +#ifdef __LP64__
> +# define __PROPERTY_ALIGN 3
> +#else
> +# define __PROPERTY_ALIGN 2
> +#endif
> +
> + .section ".note.gnu.property", "a"
> + .p2align __PROPERTY_ALIGN
> + .long 1f - 0f /* name length. */
> + .long 4f - 1f /* data length. */
> + /* NT_GNU_PROPERTY_TYPE_0. */
> + .long 5 /* note type. */
> +0:
> + .asciz "GNU" /* vendor name. */
> +1:
> + .p2align __PROPERTY_ALIGN
> + /* GNU_PROPERTY_1_NEEDED. */
> + .long 0xb0008000 /* pr_type. */
> + .long 3f - 2f /* pr_datasz. */
> +2:
> + /* GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. */
> + .long 1
> +3:
> + .p2align __PROPERTY_ALIGN
> +4:
> + .text
> + .globl main
> +main:
> + .byte 0
> + } ""]
> +}
Grüße
Thomas
