大規模な組み込み Linux コードベース/SDK の開発に取り組んでいます。「Not Invented Here」 - Elbonian Code Slaves によってオフショアで発明され、さまざまなものを組み合わせています。
コードベースの一部はLive555 WIS-Streamerです。タイムスタンプに関連するわずかな問題を修正する (しようとする) ために、いくつかの呼び出しを挿入しました。これにより、コンパイルがいくつかのエラーclock_gettime(CLOCK_MONOTONIC, &ts);で失敗しました。undefined reference to 'clock_gettime'
私はこれを以前に持っていましたが-lrt、コンパイラ オプションに include を追加することで解決しましたがlibrealtime、今回は役に立ちません。私は多くのグーグルとSOを読んだことがありますが、決定的な答えを見ることはできません.プロジェクトのメイクファイルは、Web全体で見つかった例よりもはるかに複雑です.
私がメイクファイルで犯した盲目的に明らかな間違いを指摘するか、チェーンをたどってコンパイラの期待を追跡して、どこを変更する必要があるかを確認するための助けが必要です。
このプロジェクトは、特定のハードウェア用の一連のライブラリを使用してクロスコンパイルされているため、-lrt依然として必要であり (後の gcc ライブラリでは不要になっていることがわかります)、そのようなものを簡単に更新または変更することはできません。
これは、失敗したコンパイラ出力の一部であり、非常に冗長です。投稿サイズの制限を下回るように、パス名を短くしました。
make[10]: Entering directory `/ipnc_rdk/ipnc_app/network/live/testProgs'
/ipnc_rdk/../dvsdk_ipnctools/linux-devkit//bin/arm-arago-linux-gnueabi-g++ -c -I../UsageEnvironment/include -I../groupsock/include -I../liveMedia/include -I../BasicUsageEnvironment/include -I. -O3 -v -DSOCKLEN_T=socklen_t -DNO_STRSTREAM=1 -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64 -Wl,--verbose -lrt -Wall -DBSD=1 testMP3Streamer.cpp
Using built-in specs.
Target: arm-arago-linux-gnueabi
Thread model: posix
gcc version 4.3.3 (GCC)
COLLECT_GCC_OPTIONS='-c' '-I../UsageEnvironment/include' '-I../groupsock/include' '-I../liveMedia/include' '-I../BasicUsageEnvironment/include' '-I.' '-O3' '-v' '-DSOCKLEN_T=socklen_t' '-DNO_STRSTREAM=1' '-D_LARGEFILE_SOURCE=1' '-D_FILE_OFFSET_BITS=64' '-Wall' '-DBSD=1' '-shared-libgcc' '-mfloat-abi=soft'
../libexec/gcc/arm-arago-linux-gnueabi/4.3.3/cc1plus -quiet -v -I../UsageEnvironment/include -I../groupsock/include -I../liveMedia/include -I../BasicUsageEnvironment/include -I. -iprefix ../lib/gcc/arm-arago-linux-gnueabi/4.3.3/ -isysroot ../arm-arago-linux-gnueabi -D_GNU_SOURCE -DSOCKLEN_T=socklen_t -DNO_STRSTREAM=1 -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64 -DBSD=1 testMP3Streamer.cpp -quiet -dumpbase testMP3Streamer.cpp -mfloat-abi=soft -auxbase testMP3Streamer -O3 -Wall -version -o /tmp/cckqq421.s
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3"
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3/arm-arago-linux-gnueabi"
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3/backward"
ignoring nonexistent directory "../arm-arago-linux-gnueabi/usr/local/include"
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/include"
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/include-fixed"
ignoring duplicate directory "../lib/gcc/../../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include"
#include "..." search starts here:
#include <...> search starts here:
../UsageEnvironment/include
../groupsock/include
../liveMedia/include
../BasicUsageEnvironment/include
.
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3/arm-arago-linux-gnueabi
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include/c++/4.3.3/backward
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/include
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/include-fixed
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/include
../arm-arago-linux-gnueabi/usr/include
End of search list.
GNU C++ (GCC) version 4.3.3 (arm-arago-linux-gnueabi)
compiled by GNU C version 4.4.3, GMP version 4.2.4, MPFR version 3.0.0-p7.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 05177eff49440274f3899a250a52b5a7
COLLECT_GCC_OPTIONS='-c' '-I../UsageEnvironment/include' '-I../groupsock/include' '-I../liveMedia/include' '-I../BasicUsageEnvironment/include' '-I.' '-O3' '-v' '-DSOCKLEN_T=socklen_t' '-DNO_STRSTREAM=1' '-D_LARGEFILE_SOURCE=1' '-D_FILE_OFFSET_BITS=64' '-Wall' '-DBSD=1' '-shared-libgcc' '-mfloat-abi=soft'
../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/bin/as -mfloat-abi=soft -meabi=4 -o testMP3Streamer.o /tmp/cckqq421.s
COMPILER_PATH=../libexec/gcc/arm-arago-linux-gnueabi/4.3.3/:../libexec/gcc/:../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/bin/
LIBRARY_PATH=../lib/gcc/arm-arago-linux-gnueabi/4.3.3/:../lib/gcc/:../lib/gcc/arm-arago-linux-gnueabi/4.3.3/../../../../arm-arago-linux-gnueabi/lib/:../arm-arago-linux-gnueabi/lib/:../arm-arago-linux-gnueabi/usr/lib/
COLLECT_GCC_OPTIONS='-c' '-I../UsageEnvironment/include' '-I../groupsock/include' '-I../liveMedia/include' '-I../BasicUsageEnvironment/include' '-I.' '-O3' '-v' '-DSOCKLEN_T=socklen_t' '-DNO_STRSTREAM=1' '-D_LARGEFILE_SOURCE=1' '-D_FILE_OFFSET_BITS=64' '-Wall' '-DBSD=1' '-shared-libgcc' '-mfloat-abi=soft'
/ipnc_rdk/../dvsdk_ipnctools/linux-devkit//bin/arm-arago-linux-gnueabi-g++ -otestMP3Streamer -L. testMP3Streamer.o ../liveMedia/libliveMedia.a ../groupsock/libgroupsock.a ../BasicUsageEnvironment/libBasicUsageEnvironment.a ../UsageEnvironment/libUsageEnvironment.a
../liveMedia/libliveMedia.a: In function `RTPSink::presetNextTimestamp()':
Locale.cpp:(.text+0x3232c): undefined reference to `clock_gettime'
../liveMedia/libliveMedia.a: In function `RTCPInstance::addSR()':
Locale.cpp:(.text+0x36dd8): undefined reference to `clock_gettime'
../BasicUsageEnvironment/libBasicUsageEnvironment.a: In function `TimeNow()':
BasicHashTable.cpp:(.text+0x1edc): undefined reference to `clock_gettime'
../BasicUsageEnvironment/libBasicUsageEnvironment.a: In function `DelayQueue::DelayQueue()':
BasicHashTable.cpp:(.text+0x2378): undefined reference to `clock_gettime'
../BasicUsageEnvironment/libBasicUsageEnvironment.a: In function `DelayQueue::DelayQueue()':
BasicHashTable.cpp:(.text+0x2414): undefined reference to `clock_gettime'
../BasicUsageEnvironment/libBasicUsageEnvironment.a:BasicHashTable.cpp:(.text+0x246c): more undefined references to `clock_gettime' follow
collect2: ld returned 1 exit status
make[10]: *** [testMP3Streamer] Error 1
残念ながら、投稿の長さの制限に達したように見えるため、メイクファイルの完全な出力または内容を添付できません! これはメイクファイルのほとんどの 1 つです...snip...。おそらく何が起こっているのか推測できるように、多くの同様のエントリを切り取った場所に配置しました。
INCLUDES = -Iinclude -I../UsageEnvironment/include -I../groupsock/include
PREFIX = /usr/local
LIBDIR = $(PREFIX)/lib
##### Change the following for your environment:
CROSS_COMPILE= $(MVTOOL_PREFIX)
COMPILE_OPTS = $(INCLUDES) -I. -v -Wall -O3 -DSOCKLEN_T=socklen_t -DNO_STRSTREAM=1 -D_LARGEFILE_SOURCE=1 -D_FILE_OFFSET_BITS=64 -Wl,--verbose -lrt
### JU - Added -lrt for MONOTONIC CLOCK in RTPSink.cpp
C = c
C_COMPILER = $(CROSS_COMPILE)gcc
C_FLAGS = $(COMPILE_OPTS)
CPP = cpp
CPLUSPLUS_COMPILER = $(CROSS_COMPILE)g++
CPLUSPLUS_FLAGS = $(COMPILE_OPTS) -DBSD=1
OBJ = o
LINK = $(CROSS_COMPILE)g++ -o
LINK_OPTS = -L.
CONSOLE_LINK_OPTS = $(LINK_OPTS)
LIBRARY_LINK = $(CROSS_COMPILE)ld -o
LIBRARY_LINK_OPTS = $(LINK_OPTS) -r -Bstatic
LIB_SUFFIX = a
LIBS_FOR_CONSOLE_APPLICATION =
LIBS_FOR_GUI_APPLICATION =
EXE =
##### End of variables to change
NAME = libliveMedia
LIVEMEDIA_LIB = $(NAME).$(LIB_SUFFIX)
ALL = $(LIVEMEDIA_LIB)
all: $(ALL)
.$(C).$(OBJ):
$(C_COMPILER) -c $(C_FLAGS) $<
.$(CPP).$(OBJ):
$(CPLUSPLUS_COMPILER) -c $(CPLUSPLUS_FLAGS) $<
MP3_SOURCE_OBJS = MP3FileSource.$(OBJ) ...snip... MP3InternalsHuffman.$(OBJ) MP3InternalsHuffmanTable.$(OBJ) MP3ADURTPSource.$(OBJ)
MPEG_SOURCE_OBJS = MPEG1or2Demux.$(OBJ) ...snip... ADTSAudioFileSource.$(OBJ)
H263_SOURCE_OBJS = H263plusVideoRTPSource.$(OBJ) H263plusVideoStreamFramer.$(OBJ) H263plusVideoStreamParser.$(OBJ)
AC3_SOURCE_OBJS = AC3AudioStreamFramer.$(OBJ) AC3AudioRTPSource.$(OBJ)
DV_SOURCE_OBJS = DVVideoStreamFramer.$(OBJ) DVVideoRTPSource.$(OBJ)
MP3_SINK_OBJS = MP3ADURTPSink.$(OBJ)
MPEG_SINK_OBJS = MPEG1or2AudioRTPSink.$(OBJ) $(MP3_SINK_OBJS) MPEG1or2VideoRTPSink.$(OBJ) MPEG4LATMAudioRTPSink.$(OBJ) MPEG4GenericRTPSink.$(OBJ) MPEG4ESVideoRTPSink.$(OBJ)
H263_SINK_OBJS = H263plusVideoRTPSink.$(OBJ)
H264_OR_5_SINK_OBJS = H264or5VideoRTPSink.$(OBJ) H264VideoRTPSink.$(OBJ) H265VideoRTPSink.$(OBJ)
DV_SINK_OBJS = DVVideoRTPSink.$(OBJ)
AC3_SINK_OBJS = AC3AudioRTPSink.$(OBJ)
MISC_SOURCE_OBJS = MediaSource.$(OBJ) ...snip... StreamReplicator.$(OBJ)
MISC_SINK_OBJS = MediaSink.$(OBJ) ...snip... OutputFile.$(OBJ)
MISC_FILTER_OBJS = uLawAudioFilter.$(OBJ)
TRANSPORT_STREAM_TRICK_PLAY_OBJS = MPEG2IndexFromTransportStream.$(OBJ) MPEG2TransportStreamIndexFile.$(OBJ) MPEG2TransportStreamTrickModeFilter.$(OBJ)
RTP_SOURCE_OBJS = RTPSource.$(OBJ) ...snip... VP9VideoRTPSource.$(OBJ)
RTP_SINK_OBJS = RTPSink.$(OBJ) MultiFramedRTPSink.$(OBJ) AudioRTPSink.$(OBJ) VideoRTPSink.$(OBJ) TextRTPSink.$(OBJ)
RTP_INTERFACE_OBJS = RTPInterface.$(OBJ)
RTP_OBJS = $(RTP_SOURCE_OBJS) $(RTP_SINK_OBJS) $(RTP_INTERFACE_OBJS)
RTCP_OBJS = RTCP.$(OBJ) rtcp_from_spec.$(OBJ)
GENERIC_MEDIA_SERVER_OBJS = GenericMediaServer.$(OBJ)
RTSP_OBJS = RTSPServer.$(OBJ) RTSPClient.$(OBJ) RTSPCommon.$(OBJ) RTSPServerSupportingHTTPStreaming.$(OBJ) RTSPRegisterSender.$(OBJ)
SIP_OBJS = SIPClient.$(OBJ)
SESSION_OBJS = MediaSession.$(OBJ) ...snip... ProxyServerMediaSession.$(OBJ)
QUICKTIME_OBJS = QuickTimeFileSink.$(OBJ) QuickTimeGenericRTPSource.$(OBJ)
AVI_OBJS = AVIFileSink.$(OBJ)
MATROSKA_FILE_OBJS = MatroskaFile.$(OBJ) MatroskaFileParser.$(OBJ) EBMLNumber.$(OBJ) MatroskaDemuxedTrack.$(OBJ)
MATROSKA_SERVER_MEDIA_SUBSESSION_OBJS = MatroskaFileServerMediaSubsession.$(OBJ) MP3AudioMatroskaFileServerMediaSubsession.$(OBJ)
MATROSKA_RTSP_SERVER_OBJS = MatroskaFileServerDemux.$(OBJ) $(MATROSKA_SERVER_MEDIA_SUBSESSION_OBJS)
MATROSKA_OBJS = $(MATROSKA_FILE_OBJS) $(MATROSKA_RTSP_SERVER_OBJS)
OGG_FILE_OBJS = OggFile.$(OBJ) OggFileParser.$(OBJ) OggDemuxedTrack.$(OBJ)
OGG_SERVER_MEDIA_SUBSESSION_OBJS = OggFileServerMediaSubsession.$(OBJ)
OGG_RTSP_SERVER_OBJS = OggFileServerDemux.$(OBJ) $(OGG_SERVER_MEDIA_SUBSESSION_OBJS)
OGG_OBJS = $(OGG_FILE_OBJS) $(OGG_RTSP_SERVER_OBJS)
MISC_OBJS = BitVector.$(OBJ) StreamParser.$(OBJ) DigestAuthentication.$(OBJ) ourMD5.$(OBJ) Base64.$(OBJ) Locale.$(OBJ)
LIVEMEDIA_LIB_OBJS = Media.$(OBJ) $(MISC_SOURCE_OBJS) $(MISC_SINK_OBJS) $(MISC_FILTER_OBJS) $(RTP_OBJS) $(RTCP_OBJS) $(GENERIC_MEDIA_SERVER_OBJS) $(RTSP_OBJS) $(SIP_OBJS) $(SESSION_OBJS) $(QUICKTIME_OBJS) $(AVI_OBJS) $(TRANSPORT_STREAM_TRICK_PLAY_OBJS) $(MATROSKA_OBJS) $(OGG_OBJS) $(MISC_OBJS)
$(LIVEMEDIA_LIB): $(LIVEMEDIA_LIB_OBJS) \
$(PLATFORM_SPECIFIC_LIB_OBJS)
$(LIBRARY_LINK)$@ $(LIBRARY_LINK_OPTS) \
$(LIVEMEDIA_LIB_OBJS)
Media.$(CPP): include/Media.hh
include/Media.hh: include/liveMedia_version.hh
MediaSource.$(CPP): include/MediaSource.hh
include/MediaSource.hh: include/Media.hh
FramedSource.$(CPP): include/FramedSource.hh
include/FramedSource.hh: include/MediaSource.hh
...snip...
ourMD5.$(CPP): include/ourMD5.hh
Base64.$(CPP): include/Base64.hh
Locale.$(CPP): include/Locale.hh
include/liveMedia.hh:: include/MPEG1or2AudioRTPSink.hh ...snip... include/VP9VideoRTPSource.hh
include/liveMedia.hh:: include/MPEG2TransportStreamFromPESSource.hh ...snip... include/RTSPRegisterSender.hh
include/liveMedia.hh:: include/RTSPServerSupportingHTTPStreaming.hh ...snip... include/ProxyServerMediaSession.hh
clean:
-rm -rf *.$(OBJ) $(ALL) core *.core *~ include/*~
install: install1 $(INSTALL2)
install1: $(LIVEMEDIA_LIB)
install -d $(DESTDIR)$(PREFIX)/include/liveMedia $(DESTDIR)$(LIBDIR)
install -m 644 include/*.hh $(DESTDIR)$(PREFIX)/include/liveMedia
install -m 644 $(LIVEMEDIA_LIB) $(DESTDIR)$(LIBDIR)
install_shared_libraries: $(LIVEMEDIA_LIB)
ln -fs $(NAME).$(LIB_SUFFIX) $(DESTDIR)$(LIBDIR)/$(NAME).$(SHORT_LIB_SUFFIX)
ln -fs $(NAME).$(LIB_SUFFIX) $(DESTDIR)$(LIBDIR)/$(NAME).so
##### Any additional, platform-specific rules come here: