On 5 Jun 2018, at 15:03, Mark Millard via freebsd-toolchain <freebsd-toolchain@freebsd.org> wrote: > > https://ci.freebsd.org/job/FreeBSD-head-amd64-gcc/5974/consoleText shows: > > --- all_subdir_usr.sbin/pmc --- > In file included from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/ios:216:0, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/iostream:38, > from /workspace/src/usr.sbin/pmc/cmd_pmc_filter.cc:71: > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/__locale: At > global scope: > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/__locale:1237:40: > error: redundant redeclaration of 'void > std::__1::__throw_runtime_error(const char*)' in same scope > [-Werror=redundant-decls] > _LIBCPP_NORETURN _LIBCPP_FUNC_VIS void __throw_runtime_error(const char*); > ^~~~~~~~~~~~~~~~~~~~~ > In file included from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/memory:663:0, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/algorithm:643, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/__string:56, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/string_view:176, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/string:477, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/__locale:15, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/ios:216, > from > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/iostream:38, > from /workspace/src/usr.sbin/pmc/cmd_pmc_filter.cc:71: > /workspace/obj/workspace/src/amd64.amd64/tmp/usr/include/c++/v1/stdexcept:186:40: > note: previous declaration of 'void std::__1::__throw_runtime_error(const > char*)' > _LIBCPP_NORETURN _LIBCPP_FUNC_VIS void __throw_runtime_error(const char*); > ^~~~~~~~~~~~~~~~~~~~~ > > > It looks like the new #include of iostream brings in code that gcc rejected > above: > > --- head/usr.sbin/pmc/cmd_pmc_filter.c Mon Jun 4 23:17:18 2018 > (r334645, copy source) > +++ head/usr.sbin/pmc/cmd_pmc_filter.cc Tue Jun 5 04:26:40 2018 > (r334647) > @@ -68,11 +68,22 @@ __FBSDID("$FreeBSD$"); > #include <libpmcstat.h> > #include "cmd_pmc.h" > > +#include <iostream> > . . .
I don't think anybody has yet tested building libc++ headers with the combination of recent gcc, -Wsystem-headers, and -Werror. :) For now, try disabling -Wredundant-decls. -Dimitry
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