https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86815
--- Comment #5 from Gianfranco <costamagnagianfranco at yahoo dot it> --- working one: /usr/lib/gcc-snapshot/bin/gcc -v Using built-in specs. COLLECT_GCC=/usr/lib/gcc-snapshot/bin/gcc COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/arm-linux-gnueabihf/9/lto-wrapper Target: arm-linux-gnueabihf Configured with: ../src/configure -v --with-pkgversion='Debian 20180721-1' --with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs --enable-languages=c,ada,c++,go,fortran,objc,obj-c++ --prefix=/usr/lib/gcc-snapshot --with-gcc-major-version-only --program-prefix= --enable-shared --enable-linker-build-id --disable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --disable-libquadmath-support --enable-plugin --with-system-zlib --enable-objc-gc=auto --enable-multiarch --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror --enable-checking=yes --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf Thread model: posix gcc version 9.0.0 20180721 (experimental) [trunk revision 262917] (Debian 20180721-1)