Hello, On core-updates (at least as of commit 8456581375cf), the gcc package fails to cross-compile. This can be seen in the following CI jobs:
• https://ci.guix.gnu.org/build/667365/details gcc-11.1.0, arm-linux-gnueabihf.gcc.x86_64-linux • https://ci.guix.gnu.org/build/667394/details gcc-11.1.0, aarch64-linux-gnu.gcc.x86_64-linux • https://ci.guix.gnu.org/build/667452/details gcc-11.1.0, powerpc64le-linux-gnu.gcc.x86_64-linux • https://ci.guix.gnu.org/build/667481/details gcc-11.1.0, riscv64-linux-gnu.gcc.x86_64-linux • https://ci.guix.gnu.org/build/667336/details gcc-11.1.0, mips64el-linux-gnu.gcc.x86_64-linux • https://ci.guix.gnu.org/build/667423/details gcc-11.1.0, powerpc-linux-gnu.gcc.x86_64-linux They all fail with a similar error: --8<---------------cut here---------------start------------->8--- ⋮ In file included from /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/bits/move.h:57, from /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/bits/nested_exception.h:40, from ../../../../gcc-11.1.0/libstdc++-v3/libsupc++/exception:148, from ../../../../gcc-11.1.0/libstdc++-v3/libsupc++/eh_exception.cc:26: /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/type_traits:971:25: error: there are no arguments to ?__is_nothrow_constructible? that depend on a template parameter, so a declaration of ?__is_nothrow_constructible? must be available [-fpermissive] 971 | = __bool_constant<__is_nothrow_constructible(_Tp, _Args...)>; | ^~~~~~~~~~~~~~~~~~~~~~~~~~ /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/type_traits:971:25: note: (if you use ?-fpermissive?, G++ will accept your code, but allowing the use of an undeclared name is deprecated) /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/type_traits:971:66: error: template argument 1 is invalid 971 | = __bool_constant<__is_nothrow_constructible(_Tp, _Args...)>; | ^ /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/type_traits:976:45: error: expected template-name before ?<? token 976 | : public __is_nothrow_constructible_impl<_Tp, _Args...>::type | ^ /tmp/guix-build-gcc-11.1.0.drv-0/build/arm-linux-gnueabihf/libstdc++-v3/include/type_traits:976:45: error: expected ?{? before ?<? token ⋮ --8<---------------cut here---------------end--------------->8--- In addition to that, arm-linux-gnueabihf.gcc.x86_64-linux has the following error which doesn’t appear on the other arches: no include path in which to search for stdc-predef.h As a side note, gcc-11.1.0 also fails to build on i586-pc-gnu.gcc.x86_64-linux¹, but with a very different error message, so it appears to be an unrelated problem. gcc-8.5.0 also fails to cross-compile on several arches, but with a different error message as well, so it also appears to be a separate problem. -- Thanks, Thiago ¹ https://ci.guix.gnu.org/build/667510/details
