https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
--- Comment #75 from Damien Merenne <dam at cosinux dot org> --- Indeed in my previous comment the bug seemed to be something else, but I just reproduced the original bug: In file included from /Users/dam/.conan/data/arm_none_eabi_gcc_installer/9.1.0/bloomlife/dev/build/743cf0321be3152777da4d05247a66d1552e70a2/gcc-9.1.0/libstdc++-v3/libsupc++/new:40, from /Users/dam/.conan/data/arm_none_eabi_gcc_installer/9.1.0/bloomlife/dev/build/743cf0321be3152777da4d05247a66d1552e70a2/gcc-9.1.0/libstdc++-v3/libsupc++/bad_array_new.cc:24: /Users/dam/.conan/data/arm_none_eabi_gcc_installer/9.1.0/bloomlife/dev/build/743cf0321be3152777da4d05247a66d1552e70a2/gcc-9.1.0/libstdc++-v3/libsupc++/exception:144:10: fatal error: bits/nested_exception.h: No such file or directory 144 | #include <bits/nested_exception.h> | ^~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. make[8]: *** [bad_array_new.lo] Error 1 make[8]: *** Waiting for unfinished jobs.... make[7]: *** [all-recursive] Error 1 make[6]: *** [all] Error 2 make[5]: *** [multi-do] Error 1 make[4]: *** [all-multi] Error 2 make[3]: *** [all-recursive] Error 1 make[2]: *** [all] Error 2 make[1]: *** [all-target-libstdc++-v3] Error 2 make: *** [all] Error 2 It's in libstdc++ and the header is from gcc.