[Bug c/96362] New: bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[Bug c/96362] New: bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[nicholas.h.briggs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

            Bug ID: 96362
           Summary: bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails
                    compiling libgcc2.c (.group in output)
           Product: gcc
           Version: 9.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: nicholas.h.briggs at gmail dot com
  Target Milestone: ---

Created attachment 48947
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48947&action=edit
Intermediate output from gcc-9.3.0 compiling libgcc2 during bootstrap

Attempting to bootstrap gcc 9.3.0 (and same problem with gcc 10.2.0) on
sparc-sun-solaris2.11 system fails at the point of compiling libgcc2.c for
_ffssi2 as the compiler generates a .group directive which is not understood by
the binutils-2.35 as.

Configured with:

'../gcc/configure'   '--prefix=/opt/gcc-9.3' '--disable-werror'
'--disable-checking' 'CC=gcc' 'CXX=g++' '--disable-multilib'
'--build=sparc-sun-solaris2.11' 'buil
d_alias=sparc-sun-solaris2.11' '--enable-languages=c,c++,lto'

Where it attempts to execute:

/export/home/briggs/gcc-9.3-objdir/./gcc/xgcc
-B/export/home/briggs/gcc-9.3-objdir/./gcc/
-B/opt/gcc-9.3/sparc-sun-solaris2.11/bin/
-B/opt/gcc-9.3/sparc-sun-solaris2.11/lib/ -isystem
/opt/gcc-9.3/sparc-sun-solaris2.11/include -isystem
/opt/gcc-9.3/sparc-sun-solaris2.11/sys-include   -fno-checking -g -O2 -O2  -g
-O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -fPIC -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector  
-fPIC -I. -I. -I../.././gcc -I../../../gcc/libgcc -I../../../gcc/libgcc/.
-I../../../gcc/libgcc/../gcc -I../../../gcc/libgcc/../include  -DHAVE_CC_TLS 
-o _ffssi2.o -MT _ffssi2.o -MD -MP -MF _ffssi2.dep -DL_ffssi2 -c
../../../gcc/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS

it fails with

_ffssi2.s: Assembler messages:
_ffssi2.s:1536: Error: unknown pseudo-op: `.group'

The complete _ffssi2.i and _ffssi2.s are attached.  The problematic section in
the _ffssi2.s is:

.LLASF11:
        .asciz  "__seekable"
        .ident  "GCC: (GNU) 9.3.0"
        .section       
".text.__sparc_get_pc_thunk.l7%__sparc_get_pc_thunk.l7",#alloc,#execinstr,#progbits
        .group 
__sparc_get_pc_thunk.l7,".text.__sparc_get_pc_thunk.l7%__sparc_get_pc_thunk.l7",#comdat
        .align 4
        .weak   __sparc_get_pc_thunk.l7
        .hidden __sparc_get_pc_thunk.l7
        .type   __sparc_get_pc_thunk.l7, #function
        .proc   020
__sparc_get_pc_thunk.l7:
        .cfi_startproc
        jmp     %o7+8
         add    %o7, %l7, %l7
        .cfi_endproc

[Bug c/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[nicholas.h.briggs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

--- Comment #1 from Nick Briggs <nicholas.h.briggs at gmail dot com> ---
Created attachment 48948
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48948&action=edit
Intermediate output from gcc-9.3.0 compiling libgcc2 during bootstrap

[Bug c/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[nicholas.h.briggs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

--- Comment #2 from Nick Briggs <nicholas.h.briggs at gmail dot com> ---
binutils/as version is:

/opt/binutils/bin/as --version
GNU assembler (GNU Binutils) 2.35
Copyright (C) 2020 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or later.
This program has absolutely no warranty.
This assembler was configured for a target of `sparc-sun-solaris2.11'.

[Bug target/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[nicholas.h.briggs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

--- Comment #3 from Nick Briggs <nicholas.h.briggs at gmail dot com> ---
Could not configuring with "--with-gnu-as" have caused this?

Also, since it seems to be related to COMDAT, would "--disable-comdat" (if such
an option exists, since only --enable-comdat is documented) have avoided this?

[Bug target/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

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

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You need to use --with-gnu-as if you are using the GNU as on Solaris.
Note if you are using GNU ld, you might also need to use --with-gnu-ld .

[Bug target/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is documented on https://gcc.gnu.org/install/configure.html too:
Confusion may also result if the compiler finds the GNU assembler but has not
been configured with --with-gnu-as.
...
The following systems are the only ones where it makes a difference whether you
use the GNU assembler. On any other system, --with-gnu-as has no effect.

‘hppa1.0-any-any’
‘hppa1.1-any-any’
‘sparc-sun-solaris2.any’
‘sparc64-any-solaris2.any’

[Bug target/96362] bootstrapping gcc 9.3.0 on sparc-sun-solaris2.11 fails compiling libgcc2.c (.group in output)

[nicholas.h.briggs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96362

--- Comment #6 from Nick Briggs <nicholas.h.briggs at gmail dot com> ---
Perhaps the info at https://gcc.gnu.org/install/specific.html could be updated
in the sparc*solaris section to include the notes about gnu as in the same way
that the x86*solaris section mentions it?