[Bug c++/99401] New: GCC11 MinGW-w64 32-bit build fails with undefined reference to `LC0'

[Bug c++/99401] New: GCC11 MinGW-w64 32-bit build fails with undefined reference to `LC0'

[brechtsanders at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

            Bug ID: 99401
           Summary: GCC11 MinGW-w64 32-bit build fails with undefined
                    reference to `LC0'
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: brechtsanders at users dot sourceforge.net
  Target Milestone: ---

Created attachment 50301
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50301&action=edit
make output

When building GCC11 (last tested with 11-20210228) for Windows 32-bit with
MinGW-w64 the build fails with undefined references to LC0/LC1/LC2/LC3.

My build was done using the following configure command:
../configure --prefix=/R/winlibs32_stage/inst_gcc-11-20210228/share/gcc
--build=i686-w64-mingw32 --host=i686-w64-mingw32 --with-pkgversion=MinGW-W64
i686-posix-dwarf, built by Brecht Sanders --with-tune=generic
--enable-checking=release --enable-threads=posix --with-dwarf2
--disable-sjlj-exceptions --disable-libunwind-exceptions
--disable-serial-configure --disable-bootstrap --enable-host-shared
--enable-plugin --disable-default-ssp --disable-rpath --disable-libstdcxx-pch
--enable-libstdcxx-time=yes --disable-libstdcxx-debug
--disable-version-specific-runtime-libs --with-stabs --disable-symvers
--enable-languages=c,c++,lto,objc,obj-c++,d --disable-gold --disable-nls
--disable-stage1-checking --disable-win32-registry --disable-multilib
--enable-ld --enable-libquadmath --enable-libada --enable-libssp
--enable-libstdcxx --enable-lto --enable-fully-dynamic-string --enable-libgomp
--enable-graphite --enable-mingw-wildcard
--with-mpc=/d/Prog/winlibs32_stage/custombuilt
--with-mpfr=/d/Prog/winlibs32_stage/custombuilt
--with-gmp=/d/Prog/winlibs32_stage/custombuilt
--with-isl=/d/Prog/winlibs32_stage/custombuilt --enable-install-libiberty
--enable-__cxa_atexit --without-included-gettext --with-diagnostics-color=auto
--with-libiconv --with-system-zlib
--with-build-sysroot=/R/winlibs32_stage/gcc-11-20210228/mingw-w64
--enable-large-address-aware
CFLAGS=-I/d/Prog/winlibs32_stage/custombuilt/include/libdl-win32

Note that I was able to build the 32-bit compiler once, but I had to disable
fortran to work around this error. This is the second iteration where I try to
build GCC 11-20210228 with the same version of GCC from the first iteration.

Windows 64-bit builds work fine, so this error is limited to Windows 32-bit.

Any idea what causes this?

[Bug c++/99401] GCC11 MinGW-w64 32-bit build fails with undefined reference to `LC0'

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-03-05
             Status|UNCONFIRMED                 |WAITING
     Ever confirmed|0                           |1
                 CC|                            |ebotcazou at gcc dot gnu.org

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
This looks like an issue with the base compiler, could you post the output of
'gcc -v'?  Could you also avoid forcing -O2 during stage #1, i.e. use the
default -O0 or only -O1?

[Bug target/99401] GCC11 MinGW-w64 32-bit build fails with undefined reference to `LC0'

[brechtsanders at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

--- Comment #2 from Brecht Sanders <brechtsanders at users dot sourceforge.net> ---
Created attachment 50302
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50302&action=edit
gcc -v

[Bug target/99401] GCC11 MinGW-w64 32-bit build fails with undefined reference to `LC0'

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> gcc -v

No, what's needed is the output for the *base* compiler, i.e. the compiler you
start from, not the compiler you're building.

[Bug target/99401] Rebuilding the compiler with itself fails at -O2

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
            Summary|GCC11 MinGW-w64 32-bit      |Rebuilding the compiler
                   |build fails with undefined  |with itself fails at -O2
                   |reference to `LC0'          |
           Keywords|build                       |

--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
OK, I missed that you're explicitly rebuilding the compiler with itself after
having bootstrapped it first...  You're on your own here, no one does that.

[Bug target/99401] Rebuilding the compiler with itself fails at -O2

[brechtsanders at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

--- Comment #5 from Brecht Sanders <brechtsanders at users dot sourceforge.net> ---
*** Bug 97618 has been marked as a duplicate of this bug. ***

[Bug target/99401] Rebuilding the compiler with itself fails at -O2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Anyway, in that case you want to attach here the preprocessed source on which
some undefined references to LC* appear and state exact gcc options that were
used to compile that, so that others can try to reproduce it e.g. with
cross-compilers.

[Bug target/99401] Rebuilding the compiler with itself fails at -O2

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Maybe dup of PR99872 ?

[Bug target/99401] Rebuilding the compiler with itself fails at -O2

[brechtsanders at users dot sourceforge.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99401

Brecht Sanders <brechtsanders at users dot sourceforge.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #8 from Brecht Sanders <brechtsanders at users dot sourceforge.net> ---
Recently released version 11.1.0 does build for Windows 32-bit with MinGW-w64
without issues.