Date: Thu, 25 Aug 2016 09:06:42 +0200 From: Dimitry Andric <dimitry@andric.com> To: Willem Jan Withagen <wjw@digiware.nl> Cc: FreeBSD Toolchain <freebsd-toolchain@freebsd.org> Subject: Re: name conflict after upgrade to HEAD. Message-ID: <098B0C71-3287-49B6-A80F-25A63087134F@andric.com> In-Reply-To: <8892da81-7aa6-20cf-3edd-106d85cd5aef@digiware.nl> References: <0777433b-66fd-7a16-c8b5-25f6fee7ad31@digiware.nl> <2783A1E7-853F-4361-88BF-362B6C5F4764@andric.com> <8892da81-7aa6-20cf-3edd-106d85cd5aef@digiware.nl>
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On 24 Aug 2016, at 16:30, Willem Jan Withagen <wjw@digiware.nl> wrote:
>
> On 24-8-2016 15:23, Dimitry Andric wrote:
...
>> Can you show the full command line used to build the offending source
>> file? Usually this is caused by an incorrect include directory search
>> order. And most often, that is caused by build systems inserting
>> -isystem into compile command lines.
>
> This is the full output of the failing compile
>
> --WjW
>
> [ 3%] Building CXX object
> src/CMakeFiles/common.dir/common/perf_counters.cc.o
> cd /home/wjw/ceph/build/src && /usr/bin/CC
> -DCEPH_LIBDIR=\"/usr/local/lib\"
> -DCEPH_PKGLIBDIR=\"/usr/local/lib/ceph\"
> -I/home/wjw/ceph/build/src/include -I/home/wjw/ceph/src
> -I/usr/local/include -I/home/wjw/ceph/build/include
> -I/home/wjw/ceph/src/xxHash -Wall -Wtype-limits -Wignored-qualifiers
> -Winit-self -Wpointer-arith -Werror=format-security -fno-strict-aliasing
> -fsigned-char -Wno-inconsistent-missing-override -Wno-mismatched-tags
> -Wno-unused-function -Wno-unused-local-typedef
> -Wno-inconsistent-missing-override -Wno-unused-private-field
> -Wno-varargs -Wno-gnu-designator -Wno-mismatched-tags
> -Wno-missing-braces -Wno-parentheses -Wno-deprecated-register
> -ftemplate-depth-1024 -Wno-invalid-offsetof -Wnon-virtual-dtor
> -Wno-overloaded-virtual -fdiagnostics-color=auto
> -I/usr/local/include/nss/nss -I/usr/local/include/nspr
> -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc
> -fno-builtin-free -O0 -g -fPIC -DHAVE_CONFIG_H -D__CEPH__ -D_REENTRANT
> -D_THREAD_SAFE -D__STDC_FORMAT_MACROS -std=c++11 -o
> CMakeFiles/common.dir/common/perf_counters.cc.o -c
> /home/wjw/ceph/src/common/perf_counters.cc
> In file included from /home/wjw/ceph/src/common/perf_counters.cc:17:
> In file included from /home/wjw/ceph/src/common/perf_counters.h:21:
> In file included from /home/wjw/ceph/src/include/utime.h:18:
> /usr/include/c++/v1/math.h:845:37: error: reference to 'log' is ambiguous
> log(_A1 __lcpp_x) _NOEXCEPT {return log((double)__lcpp_x);}
> ^
> /usr/include/c++/v1/math.h:845:1: note: candidate found by name lookup
> is 'log'
> log(_A1 __lcpp_x) _NOEXCEPT {return log((double)__lcpp_x);}
> ^
> /usr/include/c++/v1/math.h:839:46: note: candidate found by name lookup
> is 'log'
> inline _LIBCPP_INLINE_VISIBILITY long double log(long double __lcpp_x)
> _NOEXCEPT {return logl(__lcpp_x);}
> ^
> /usr/include/c++/v1/math.h:838:46: note: candidate found by name lookup
> is 'log'
> inline _LIBCPP_INLINE_VISIBILITY float log(float __lcpp_x)
> _NOEXCEPT {return logf(__lcpp_x);}
> ^
> /usr/include/math.h:247:8: note: candidate found by name lookup is 'log'
> double log(double);
> ^
> /home/wjw/ceph/src/common/ceph_context.h:44:13: note: candidate found by
> name lookup is 'ceph::log'
> namespace log {
> ^
Okay, no -isystem options there. So that's not it. Now I'm assuming
this is because the original .cc file includes <math.h>, which imports a
global "log" symbol. Can you try changing that include to <cmath>?
However, this could require prefixing some math function calls with
std::.
-Dimitry
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