https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322
--- Comment #25 from Mathieu Malaterre <malat at debian dot org> ---
(In reply to Martin Liška from comment #24)
> > sid64 % g++ *.cc -O2 -m32 && ./a.out
>
> Please provide output with --verbose.
% g++ --verbose *.cc -O2 -m32 && ./a.out
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/12/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12.1.0-7'
--with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-12
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin
--enable-default-pie --with-system-zlib --enable-libphobos-checking=release
--with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch
--disable-werror --enable-cet --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none=/build/gcc-12-aYRw0H/gcc-12-12.1.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-12-aYRw0H/gcc-12-12.1.0/debian/tmp-gcn/usr
--enable-offload-defaulted --without-cuda-driver --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.1.0 (Debian 12.1.0-7)
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a-'
/usr/lib/gcc/x86_64-linux-gnu/12/cc1plus -quiet -v -imultilib 32 -imultiarch
i386-linux-gnu -D_GNU_SOURCE bytes.cc -quiet -dumpdir a- -dumpbase bytes.cc
-dumpbase-ext .cc -m32 -mtune=generic -march=i686 -O2 -version
-fasynchronous-unwind-tables -o /tmp/cccQJh1u.s
GNU C++17 (Debian 12.1.0-7) version 12.1.0 (x86_64-linux-gnu)
compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version
4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/i386-linux-gnu/c++/12"
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/12/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/usr/include/i386-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/12
/usr/include/x86_64-linux-gnu/c++/12/32
/usr/include/c++/12/backward
/usr/lib/gcc/x86_64-linux-gnu/12/include
/usr/local/include
/usr/include
End of search list.
GNU C++17 (Debian 12.1.0-7) version 12.1.0 (x86_64-linux-gnu)
compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version
4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8a56007e6299a53b3d2bb12e46ecf480
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a-'
as -v --32 -o /tmp/ccG1Wx1X.o /tmp/cccQJh1u.s
GNU assembler version 2.38.90 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Debian) 2.38.90.20220713
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a-'
/usr/lib/gcc/x86_64-linux-gnu/12/cc1plus -quiet -v -imultilib 32 -imultiarch
i386-linux-gnu -D_GNU_SOURCE demo.cc -quiet -dumpdir a- -dumpbase demo.cc
-dumpbase-ext .cc -m32 -mtune=generic -march=i686 -O2 -version
-fasynchronous-unwind-tables -o /tmp/cccQJh1u.s
GNU C++17 (Debian 12.1.0-7) version 12.1.0 (x86_64-linux-gnu)
compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version
4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/12/../../../../include/i386-linux-gnu/c++/12"
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/12/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/x86_64-linux-gnu/12/../../../../x86_64-linux-gnu/include"
ignoring nonexistent directory "/usr/include/i386-linux-gnu"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/12
/usr/include/x86_64-linux-gnu/c++/12/32
/usr/include/c++/12/backward
/usr/lib/gcc/x86_64-linux-gnu/12/include
/usr/local/include
/usr/include
End of search list.
GNU C++17 (Debian 12.1.0-7) version 12.1.0 (x86_64-linux-gnu)
compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version
4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8a56007e6299a53b3d2bb12e46ecf480
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a-'
as -v --32 -o /tmp/ccXuCoem.o /tmp/cccQJh1u.s
GNU assembler version 2.38.90 (x86_64-linux-gnu) using BFD version (GNU
Binutils for Debian) 2.38.90.20220713
COMPILER_PATH=/usr/lib/gcc/x86_64-linux-gnu/12/:/usr/lib/gcc/x86_64-linux-gnu/12/:/usr/lib/gcc/x86_64-linux-gnu/:/usr/lib/gcc/x86_64-linux-gnu/12/:/usr/lib/gcc/x86_64-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/x86_64-linux-gnu/12/32/:/usr/lib/gcc/x86_64-linux-gnu/12/../../../../lib32/:/lib/../lib32/:/usr/lib/../lib32/:/usr/lib/gcc/x86_64-linux-gnu/12/:/usr/lib/gcc/x86_64-linux-gnu/12/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a.'
/usr/lib/gcc/x86_64-linux-gnu/12/collect2 -plugin
/usr/lib/gcc/x86_64-linux-gnu/12/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/x86_64-linux-gnu/12/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccDtT2bM.res -plugin-opt=-pass-through=-lgcc_s
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lgcc --build-id
--eh-frame-hdr -m elf_i386 --hash-style=gnu --as-needed -dynamic-linker
/lib/ld-linux.so.2 -pie
/usr/lib/gcc/x86_64-linux-gnu/12/../../../../lib32/Scrt1.o
/usr/lib/gcc/x86_64-linux-gnu/12/../../../../lib32/crti.o
/usr/lib/gcc/x86_64-linux-gnu/12/32/crtbeginS.o
-L/usr/lib/gcc/x86_64-linux-gnu/12/32
-L/usr/lib/gcc/x86_64-linux-gnu/12/../../../../lib32 -L/lib/../lib32
-L/usr/lib/../lib32 -L/usr/lib/gcc/x86_64-linux-gnu/12
-L/usr/lib/gcc/x86_64-linux-gnu/12/../../.. /tmp/ccG1Wx1X.o /tmp/ccXuCoem.o
-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc
/usr/lib/gcc/x86_64-linux-gnu/12/32/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/12/../../../../lib32/crtn.o
COLLECT_GCC_OPTIONS='-v' '-O2' '-m32' '-shared-libgcc' '-mtune=generic'
'-march=i686' '-dumpdir' 'a.'
zsh: IOT instruction ./a.out
