Date: Thu, 23 Jan 2014 02:25:52 +0900 From: Yamaya Takashi <yamayan@kbh.biglobe.ne.jp> To: Niclas Zeising <zeising+freebsd@daemonic.se> Cc: freebsd-toolchain@freebsd.org, Dimitry Andric <dim@FreeBSD.org> Subject: Re: [CFT] Update to clang 3.4 Message-ID: <52DFFF20.9000809@kbh.biglobe.ne.jp> In-Reply-To: <52DFCCFF.8080002@daemonic.se> References: <541C998A-071A-4917-9D91-DD00CB0E2689@FreeBSD.org> <63BD3165-A62E-4FE7-9817-4A2692584916@bsdimp.com> <264FAA6E-871A-48AF-A8D9-EC431A537195@FreeBSD.org> <F3FF55CD-4F78-4107-A595-BA6D91F0AFD3@FreeBSD.org> <6766B735-98CB-4F1D-B3B5-A43D81BB558A@FreeBSD.org> <52D286BE.7000102@kbh.biglobe.ne.jp> <50EAAC3C-2D38-4409-B525-2608D39BFE70@FreeBSD.org> <52DFCCFF.8080002@daemonic.se>
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On 2014/01/22 22:51, Niclas Zeising wrote:
> On 01/12/14 17:21, Dimitry Andric wrote:
>> On 12 Jan 2014, at 13:12, Yamaya Takashi <yamayan@kbh.biglobe.ne.jp> wrote:
>>> buildworld is failed when WITH_LLDB=
>> Yes, this is a known issue. I discussed it with Ed Maste. Clang 3.4
>> will have to be imported first, afterwards we can fix lldb.
>>
>>
>>> some ports cannot build.
>>>
>>> reason1: clang cannot handle some options.
>>> (libmad build)
>>> cc: error: unknown argument: '-fforce-addr'
>>> cc: error: unknown argument: '-fthread-jumps'
>>> cc: error: unknown argument: '-fcse-follow-jumps'
>>> cc: error: unknown argument: '-fcse-skip-blocks'
>>> cc: error: unknown argument: '-fregmove'
>>> cc: error: unknown argument: '-fschedule-insns2'
>>> (libtheora build)
>>> cc: error: unknown argument: '-fforce-addr'
>>> (poppler build)
>>> c++: error: unknown argument: '-fno-check-new'
>>> (py27-sqlite build)
>>> cc: error: unknown argument: '-R/usr/local/lib'
>>> (tbb build)
>>> c++: error: unknown argument: '-fno-schedule-insns2'
>>> (gstreamer-ffmpeg build)
>>> cc: error: unknown argument: '-fno-force-addr'
>> Indeed, this is likely the most troublesome aspect of the upgrade.
>>
>> Most of the above options, like "-fcse-follow-jumps", "-fno-check-new",
>> etc are gcc-specific, and will never be supported by clang. These
>> options will have to be removed, or made conditional on the compiler.
>>
>> The -R option is not a compiler option, but an ld option, and is also
>> ambiguous: ld interprets it as --just-symbols when it is followed by the
>> name of a file, but as -rpath when it is followed by the name of a
>> directory. In all cases, this should be replaced with -Wl,-rpath.
>>
>>
>>> reason2: c++ -std=c++11 detect bad c++ code which older clang cannot detect.
>>> (libproxy build)
>>> /usr/ports/net/libproxy/work/libproxy-0.4.6/libproxy/modules/wpad_dns_alias.cpp:30:23:
>>> error: cannot initialize return object of type 'libproxy::url *' with an
>>> rvalue of type 'bool'
>>> if (lasturl) return false;
>>> ^~~~~
>>> (liveMedia build)
>> I have not looked in detail at this one, but this looks like a simple
>> bug. The code should not return a boolean when the return type of the
>> function is a libproxy::url pointer. Should be easy to fix.
>>
>> The new C++11 rules make it possible to avoid 'casting' a false value to
>> a NULL pointer, and clang 3.4 detects this.
>>
>>
>>> c++ -c -Iinclude -I../UsageEnvironment/include -I../groupsock/include
>>> -I. -DBSD=1 -DSOCKLEN_T=socklen_t -D_LARGEFILE_SOURCE=1
>>> -D_FILE_OFFSET_BITS=64 -DHAVE_SOCKADDR_LEN=1 -Wall -DBSD=1 -O2 -pipe
>>> -Qunused-arguments -march=native -fPIC -fno-strict-aliasing -std=c++11
>>> -Wno-c++11-narrowing -stdlib=libc++ -Wno-deprecated RTSPRegisterSender.cpp
>>> RTSPClient.cpp:916:25: error: comparison between pointer and integer
>>> ('const char *' and 'int')
>>> if (&line[paramIndex] == '\0') return False; // the header is assumed
>>> to be bad if it has no parameters
>>> ~~~~~~~~~~~~~~~~~ ^ ~~~~
>>> (mp4v2 build)
>> This looks like an incorrect comparison: a pointer is compared with a
>> literal character. Should be easy to fix.
>>
>>
>>> c++ -DHAVE_CONFIG_H -I./include -I./include -I. -I. -Wall -Wformat -O2
>>> -pipe -Qunused-arguments -march=native -fno-strict-aliasing -std=c++11
>>> -Wno-c++11-narrowing -stdlib=libc++ -fvisibility=hidden -c
>>> src/mp4container.cpp -fPIC -DPIC -o src/.libs/mp4container.o
>>> src/mp4.cpp:679:20: error: cannot initialize return object of type
>>> 'mp4v2_ismacrypParams *' (aka 'mp4v2_ismacryp_session_params *') with an
>>> rvalue of type 'MP4TrackId' (aka 'unsigned int')
>>> return MP4_INVALID_TRACK_ID;
>>> ^~~~~~~~~~~~~~~~~~~~
>>> ./include/mp4v2/general.h:45:33: note: expanded from macro
>>> 'MP4_INVALID_TRACK_ID'
>>> #define MP4_INVALID_TRACK_ID ((MP4TrackId)0) /**< Constant:
>>> invalid MP4TrackId. */
>>> ^~~~~~~~~~~~~~~
>>> (thunderbird build)
>> Again, an attempt is made to use an incorrect type for the return value
>> of a function. Either the value should be explicitly cast to the
>> correct type (mp4v2_ismacrypParams *), or the MP4_INVALID_TRACK_ID
>> define should be fixed to be of the correct type.
>>
>>
>>> clang++ -o jsoptparse.o -c -I../../../dist/system_wrappers_js -include
>>> /usr/ports/mail/thunderbird/work/comm-esr24/mozilla/js/src/config/gcc_hidden.h
>>> -DEXPORT_JS_API -DIMPL_MFBT -DMOZ_GLUE_IN_PROGRAM -DNO_NSPR_10_SUPPORT
>>> -I/usr/ports/mail/thunderbird/work/comm-esr24/mozilla/js/src -I..
>>> -I/usr/ports/mail/thunderbird/work/comm-esr24/mozilla/js/src/shell -I.
>>> -I../../../dist/include -I/usr/local/include/nspr -fPIC
>>> -Qunused-arguments -isystem/usr/local/include -Qunused-arguments -Wall
>>> -Wpointer-arith -Woverloaded-virtual -Werror=return-type -Wtype-limits
>>> -Wempty-body -Werror=conversion-null -Wsign-compare
>>> -Wno-invalid-offsetof -Wno-c++0x-extensions -Wno-extended-offsetof
>>> -Wno-unknown-warning-option -Wno-return-type-c-linkage
>>> -Wno-mismatched-tags -O2 -pipe -Qunused-arguments -march=native -O3
>>> -fno-strict-aliasing -std=c++11 -Wno-c++11-narrowing -stdlib=libc++
>>> -fno-rtti -ffunction-sections -fdata-sections -fno-exceptions -pipe
>>> -DNDEBUG -DTRIMMED -O2 -O3 -fomit-frame-pointer -Qunused-arguments
>>> -isystem/usr/local/include -DMOZILLA_CLIENT -include ../js-confdefs.h
>>> -MD -MP -MF .deps/jsoptparse.o.pp /usr/ports/mail/thunderbir
>>> d/work/comm-esr24/mozilla/js/src/shell/jsoptparse.cpp
>>> /usr/ports/mail/thunderbird/work/comm-esr24/mozilla/js/src/shell/jsoptparse.cpp:256:22:
>>> error: comparison between pointer and integer ('char *' and 'int')
>>> if (value[0] == '\0')
>>> ~~~~~~~~ ^ ~~~~
>> Like the mp4v2 build, this is probably a simple bug. The code should
>> not compare a pointer to an integer. Most likely, the right side was
>> supposed to be NULL instead?
>>
> I'm probably late to the party, as always... But, have you or Yamaya
> Takashi tried to punt these issues to the respective port managers for
> investigation?
> Regards!
I have patches for libproxy, liveMedia, mp4v2 and thunderbird.
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