Date: Fri, 27 May 2016 13:09:46 -0600 From: Alan Somers <asomers@freebsd.org> To: Dimitry Andric <dim@freebsd.org> Cc: "src-committers@freebsd.org" <src-committers@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org> Subject: Re: svn commit: r300770 - in head: . contrib/libc++/include contrib/libc++/include/experimental contrib/libc++/include/ext contrib/libc++/src contrib/libc++/src/include contrib/libc++/src/support lib/l... Message-ID: <CAOtMX2hG6hqVy3kDUcBEifJnWWgTjARdn9cyy8eSFf9gMt%2BXxQ@mail.gmail.com> In-Reply-To: <F931C2E9-BEC3-415C-A840-541EFD378D0C@FreeBSD.org> References: <201605261852.u4QIqn5w073953@repo.freebsd.org> <CAOtMX2jRZ0ZyW5Hw1ESp6EpADa_qvX5QFPHjkgUAFjdHB1OBKA@mail.gmail.com> <D36A3E43-3FFC-4B6A-8BC2-6B7A981FBDCB@FreeBSD.org> <CAOtMX2iaNfs6XY8D9QdY9=FY95mi6TKp=_QCe4eETW7YpYhYHA@mail.gmail.com> <CCBCA662-E090-488E-BFB4-55B5153CFAE1@FreeBSD.org> <CAOtMX2hs5ZJT14fSXsFYsi%2Bo=hJ04_Q-dgnP5nJ9Ub543Dv5sg@mail.gmail.com> <F931C2E9-BEC3-415C-A840-541EFD378D0C@FreeBSD.org>
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On Fri, May 27, 2016 at 10:19 AM, Dimitry Andric <dim@freebsd.org> wrote:
> On 27 May 2016, at 18:01, Alan Somers <asomers@freebsd.org> wrote:
>>
>> On Fri, May 27, 2016 at 9:42 AM, Dimitry Andric <dim@freebsd.org> wrote:
> ...
>>> My guess is that either ${MAKEOBJDIRPREFIX}/usr/include/c++/v1 needs to
>>> be added to the C++ include path, or some other path in the list is
>>> missing, at least for C++ compilation.
>>>
>>> -Dimitry
>>
>> Here it is. It looks right to me;
>> $MAKEOBJDIRPREFIX/home/asomers/freebsd/head/lib32/usr/include/c++/v1
>> is in the path, and stddef.h exists in that directory.
>>
>> $ c++ -v -m32 -DCOMPAT_32BIT -march=i686 -mmmx -msse -msse2
>> -L/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/lib32
>> --sysroot=/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32
>> -B/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/lib32
>> -isystem /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include
>> -O2 -pipe -MD -MF.depend.consumer.o -MTconsumer.o
>> -fstack-protector-strong -Wsystem-headers -Werror -Wall
>> -Wno-format-y2k -W -Wno-unused-parameter -Wpointer-arith
>> -Wno-uninitialized -Wno-empty-body -Wno-string-plus-int
>> -Wno-unused-const-variable -Wno-tautological-compare -Wno-unused-value
>> -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
>> -Wno-unused-local-typedef -Qunused-arguments -Wno-c++11-extensions
>> -c /home/asomers/freebsd/head/lib/libdevdctl/consumer.cc -o consumer.o
>> FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on
>> LLVM 3.8.0)
>> Target: i386-unknown-freebsd11.0
>> Thread model: posix
>> InstalledDir: /scratch/tmp/asomers/obj/home/asomers/freebsd/head/tmp/usr/bin
>> "/scratch/tmp/asomers/obj/home/asomers/freebsd/head/tmp/usr/bin/c++"
>> -cc1 -triple i386-unknown-freebsd11.0 -emit-obj -disable-free
>> -main-file-name consumer.cc -mrelocation-model static -mthread-model
>> posix -mdisable-fp-elim -masm-verbose -mconstructor-aliases
>> -target-cpu i686 -target-feature +mmx -target-feature +sse
>> -target-feature +sse2 -v -dwarf-column-info -debugger-tuning=gdb
>> -coverage-file /scratch/tmp/asomers/obj/home/asomers/freebsd/head/world32/home/asomers/freebsd/head/lib/libdevdctl/consumer.o
>> -resource-dir /scratch/tmp/asomers/obj/home/asomers/freebsd/head/tmp/usr/bin/../lib/clang/3.8.0
>> -dependency-file .depend.consumer.o -sys-header-deps -MT consumer.o
>> -isystem /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include
>> -D COMPAT_32BIT -isysroot
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32
>> -internal-isystem
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include/c++/v1
>> -O2 -Wsystem-headers -Werror -Wall -Wno-format-y2k -W
>> -Wno-unused-parameter -Wpointer-arith -Wno-uninitialized
>> -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable
>> -Wno-tautological-compare -Wno-unused-value -Wno-parentheses-equality
>> -Wno-unused-function -Wno-enum-conversion -Wno-unused-local-typedef
>> -Wno-c++11-extensions -fdeprecated-macro -fdebug-compilation-dir
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/world32/home/asomers/freebsd/head/lib/libdevdctl
>> -ferror-limit 19 -fmessage-length 80 -stack-protector 2
>> -fobjc-runtime=gnustep -fcxx-exceptions -fexceptions
>> -fdiagnostics-show-option -fcolor-diagnostics -vectorize-loops
>> -vectorize-slp -o consumer.o -x c++
>> /home/asomers/freebsd/head/lib/libdevdctl/consumer.cc
>> clang -cc1 version 3.8.0 based upon LLVM 3.8.0 default target
>> x86_64-unknown-freebsd11.0
>> ignoring duplicate directory
>> "/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include"
>> #include "..." search starts here:
>> #include <...> search starts here:
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include/c++/v1
>> /scratch/tmp/asomers/obj/home/asomers/freebsd/head/tmp/usr/bin/../lib/clang/3.8.0/include
>> End of search list.
>
> The problem appears to be that the .../usr/include/c++/v1 directory
> should come *before* the .../usr/include directory, otherwise the
> #include_next<> logic will not work as expected.
>
> This is most likely caused by the option:
>
> -isystem /scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include
>
> because that forces this path to become before any auto-detected system
> include directory. Note that this option is not needed, since the other
> option:
>
> --sysroot=/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32
>
> is already taking care of adding the right include directories. It even
> warns about the duplicate directory:
>
> ignoring duplicate directory
> "/scratch/tmp/asomers/obj/home/asomers/freebsd/head/lib32/usr/include"
>
> So what happens if you delete the -isystem option and its argument?
>
> -Dimitry
>
If I take out -isystem, it compiles successfully.
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