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Re: gold on trunk breaks powerpc-, aarch64- and arm32-linux (Re: [gold][PATCH] PR gold/19119: Gold accepts bogus target emulation)


On 25.10.2015 18:40, H.J. Lu wrote:
On Sun, Oct 25, 2015 at 10:37 AM, Matthias Klose <doko@ubuntu.com> wrote:
On 15.10.2015 17:57, Cary Coutant wrote:

          PR gold/19119
          * options.h (General_options): Remove "obsolete" from -m.


I'm a little reluctant to remove "obsolete" from the description --
maybe "deprecated" instead?

          * parameters.cc (set_parameters_target): Check if input target
          is compatible with output emulation set by "-m emulation".


This is OK. Thanks!


hmm, this breaks any released gcc on aarch64-linux-gnu and
arm-linux-gnueabi*

$ gcc -fuse-ld=gold foo.c
/usr/bin/ld.gold: error: unrecognised output emulation: aarch64linux
collect2: error: ld returned 1 exit status

$ gcc -fuse-ld=gold foo.c
/usr/bin/ld.gold: error: unrecognised output emulation: armelf_linux_eabi
collect2: error: ld returned 1 exit status


What do ld.bfd -V and ld.gold -V report?  They should support the
same set of emulations.


powerpc-linux-gnu as well:
/usr/bin/ld.gold: error: unrecognised output emulation: elf32ppclinux


aarch64-linux:gnu

gold: supported emulations: aarch64_elf64_le_vec aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec elf64-tradlittlemips elf32-tradlittlemips-nacl elf64-tradbigmips elf32-tradlittlemips-nacl elf32-tradlittlemips elf32-tradlittlemips-nacl elf32-tradbigmips elf32-tradlittlemips-nacl elf32tilegx_be elf64tilegx_be elf32tilegx elf64tilegx armelfb armelfb_nacl armelf armelf_nacl elf64lppc elf64ppc elf32lppc elf32ppc elf64_sparc elf32_sparc elf32_x86_64 elf32_x86_64_nacl elf_x86_64 elf_x86_64_nacl elf_iamcu elf_i386 elf_i386_nacl

$ ld -V
GNU ld (GNU Binutils for Ubuntu) 2.25.51.20151022
  Supported emulations:
   aarch64linux
   aarch64elf
   aarch64elf32
   aarch64elf32b
   aarch64elfb
   armelf
   armelfb
   aarch64linuxb
   aarch64linux32
   aarch64linux32b
   armelfb_linux_eabi
   armelf_linux_eabi


arm-linux-gnueabihf

gold: supported emulations: aarch64_elf64_le_vec aarch64_elf64_be_vec aarch64_elf32_le_vec aarch64_elf32_be_vec elf64-tradlittlemips elf32-tradlittlemips-nacl elf64-tradbigmips elf32-tradlittlemips-nacl elf32-tradlittlemips elf32-tradlittlemips-nacl elf32-tradbigmips elf32-tradlittlemips-nacl elf32tilegx_be elf64tilegx_be elf32tilegx elf64tilegx armelfb armelfb_nacl armelf armelf_nacl elf64lppc elf64ppc elf32lppc elf32ppc elf64_sparc elf32_sparc elf32_x86_64 elf32_x86_64_nacl elf_x86_64 elf_x86_64_nacl elf_iamcu elf_i386 elf_i386_nacl

$ ld -V
GNU ld (GNU Binutils for Ubuntu) 2.25.51.20151022
  Supported emulations:
   armelf_linux_eabi
   armelfb_linux_eabi


powerpc-linux-gnu

supported emulations: elf64lppc elf64ppc elf32lppc elf32ppc

$ ld -V
GNU ld (GNU Binutils for Ubuntu) 2.25.1
  Supported emulations:
   elf32ppclinux
   elf32ppc
   elf32ppcsim
   elf64ppc


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