https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70129
Bug ID: 70129 Summary: [6 Regression] stdlib.h: No such file or directory when using -isystem /usr/include Product: gcc Version: 6.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: trippels at gcc dot gnu.org Target Milestone: --- markus@x4 tmp % echo "#include<algorithm>" | g++ -x c++ -isystem /usr/include - In file included from /usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/bits/stl_algo.h:59:0, from /usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/algorithm:62, from <stdin>:1: /usr/lib/gcc/x86_64-pc-linux-gnu/6.0.0/include/g++-v6/cstdlib:75:25: fatal error: stdlib.h: No such file or directory #include_next <stdlib.h> ^ compilation terminated. gcc-5 and older is fine.