https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102842
--- Comment #3 from tt_1 <herrtimson at yahoo dot de> --- sure I can provide happily gcc -v of host: Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-pc-linux-gnu/10.3.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /var/tmp/portage/sys-devel/gcc-10.3.0-r2/work/gcc-10.3.0/configure --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/10.3.0 --includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include --datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.3.0 --mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.3.0/man --infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/10.3.0/info --with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/10.3.0/include/g++-v10 --with-python-dir=/share/gcc-data/x86_64-pc-linux-gnu/10.3.0/python --enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --disable-libunwind-exceptions --enable-checking=release --with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo 10.3.0-r2 p3' --disable-esp --enable-libstdcxx-time --disable-libstdcxx-pch --enable-shared --enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu --enable-multilib --with-multilib-list=m32,m64 --disable-fixed-point --enable-targets=all --enable-libgomp --disable-libssp --disable-libada --disable-systemtap --enable-vtable-verify --without-zstd --enable-lto --without-isl --disable-libsanitizer --enable-default-pie --enable-default-ssp Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.3.0 (Gentoo 10.3.0-r2 p3) and cross-gcc: LANG=C armv7a-unknown-linux-gnueabihf-gcc -v Using built-in specs. COLLECT_GCC=armv7a-unknown-linux-gnueabihf-gcc COLLECT_LTO_WRAPPER=/usr/libexec/gcc/armv7a-unknown-linux-gnueabihf/10.3.0/lto-wrapper Target: armv7a-unknown-linux-gnueabihf Configured with: /var/tmp/portage/cross-armv7a-unknown-linux-gnueabihf/gcc-10.3.0-r2/work/gcc-10.3.0/configure --host=x86_64-pc-linux-gnu --target=armv7a-unknown-linux-gnueabihf --build=x86_64-pc-linux-gnu --prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/armv7a-unknown-linux-gnueabihf/gcc-bin/10.3.0 --includedir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/10.3.0/include --datadir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/10.3.0 --mandir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/10.3.0/man --infodir=/usr/share/gcc-data/armv7a-unknown-linux-gnueabihf/10.3.0/info --with-gxx-include-dir=/usr/lib/gcc/armv7a-unknown-linux-gnueabihf/10.3.0/include/g++-v10 --with-python-dir=/share/gcc-data/armv7a-unknown-linux-gnueabihf/10.3.0/python --enable-languages=c,c++,fortran --enable-obsolete --enable-secureplt --disable-werror --with-system-zlib --enable-nls --without-included-gettext --disable-libunwind-exceptions --enable-checking=release --with-bugurl=https://bugs.gentoo.org/ --with-pkgversion='Gentoo 10.3.0-r2 p3' --disable-esp --enable-libstdcxx-time --enable-poison-system-directories --with-sysroot=/usr/armv7a-unknown-linux-gnueabihf --disable-bootstrap --enable-__cxa_atexit --enable-clocale=gnu --disable-multilib --disable-fixed-point --with-float=hard --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --enable-libgomp --disable-libssp --disable-libada --disable-systemtap --disable-vtable-verify --disable-libvtv --without-zstd --enable-lto --without-isl --enable-default-pie --enable-default-ssp Thread model: posix Supported LTO compression algorithms: zlib gcc version 10.3.0 (Gentoo 10.3.0-r2 p3) I am not sure what you mean by asking for compiler options, but I can give you the exact command that fails, it should have all details in it: /usr/bin/armv7a-unknown-linux-gnueabihf-g++ --sysroot /usr/armv7a-unknown-linux-gnueabihf -std=gnu++17 -o dec_reconstruct.o -c -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/dist/stl_wrappers -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/dist/system_wrappers -include /usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/config/gcc_hidden.h -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -DNDEBUG=1 -DTRIMMED=1 -DJPEGXL_MAJOR_VERSION=0 -DJPEGXL_MINOR_VERSION=0 -DJPEGXL_PATCH_VERSION=0 -DMOZ_HAS_MOZGLUE -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/media/libjxl -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/media/libjxl -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/media/libjxl/include -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/third_party/jpeg-xl -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/third_party/jpeg-xl/lib/include -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/dist/include -I/usr/armv7a-unknown-linux-gnueabihf/usr/include/nspr -I/usr/armv7a-unknown-linux-gnueabihf/usr/include/nss -I/usr/armv7a-unknown-linux-gnueabihf/usr/include/nspr -I/usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/dist/include/nss -I/usr/armv7a-unknown-linux-gnueabihf/usr/include -I/usr/armv7a-unknown-linux-gnueabihf/usr/include/pixman-1 -I/usr/armv7a-unknown-linux-gnueabihf/usr/include -DMOZILLA_CLIENT -include /usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox_build/mozilla-config.h -Wall -Wempty-body -Wignored-qualifiers -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wno-invalid-offsetof -Wc++2a-compat -Wduplicated-cond -Wimplicit-fallthrough -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=coverage-mismatch -Wno-error=free-nonheap-object -Wno-multistatement-macros -Wno-error=class-memaccess -Wno-error=deprecated-copy -Wno-error=unused-but-set-variable -Wformat -Wformat-security -Wformat-overflow=2 -Wno-psabi -fno-sized-deallocation -fno-aligned-new -pipe -fomit-frame-pointer -fno-tree-loop-vectorize -mthumb -mno-thumb-interwork -mfpu=neon -mfloat-abi=hard -fno-exceptions -fno-strict-aliasing -funwind-tables -fPIC -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -fno-math-errno -pthread -pipe -O2 -fno-omit-frame-pointer -funwind-tables -MD -MP -MF .deps/dec_reconstruct.o.pp -fdiagnostics-color /usr/armv7a-unknown-linux-gnueabihf/tmp/portage/www-client/firefox-95.0/work/firefox-95.0/third_party/jpeg-xl/lib/jxl/dec_reconstruct.cc If I decrease optimization to -O1 it passes, -O2 and -O3 give the ICE
