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Thread: boost static linking problem

  1. #1
    Join Date
    Sep 2012
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    boost static linking problem

    Hello,

    I just installed boost on Ubuntu 12.04 64 bit. I used following instructions to do it:

    sudo apt-get install libboost-all-dev

    I can use the include parts of the boost library, but when I try to do a static linking with libboost_thread.a, I get following error message:

    /usr/bin/ld: /usr/lib/libboost_thread.a(thread.o): relocation R_X86_64_32 against `tls_destructor' can not be used when making a shared object; recompile with -fPIC
    /usr/lib/libboost_thread.a: could not read symbols: Bad value
    collect2: ld returned 1 exit status

    In my makefile, I have following:

    CFLAGS = -I./include -I./v_repExtRemoteApi -Wall -fPIC
    LDFLAGS = -lpthread -ldl

    CFLAGS += -D__linux
    OPTION = -shared
    EXT = so
    BOOST_LIB_PATH = /usr/lib
    OBJS_ADDITIONAL = $(BOOST_LIB_PATH)/libboost_thread.a

    From my understanding, I need to recompile libboost_thread.a
    Why do I need to recompile it? Because it is the 32 bit version?
    And the other question is, how do I recompile it? In the past I would download the library manually and build it manually from the install directory, but by installing it with 'sudo apt-get install libboost-all-dev' I got confused.

    Any help is appreciated, thanks a lot!

  2. #2
    Join Date
    May 2010
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    Re: boost static linking problem

    Thread moved to "programming Talk".
    If you believe everything you read, you better not read. ~ Japanese Proverb

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed. - Mark Twain

  3. #3
    Join Date
    Jun 2007
    Location
    Maryland, US
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    Kubuntu

    Re: boost static linking problem

    Quote Originally Posted by marcimatz View Post
    Any help is appreciated, thanks a lot!
    It appears that you are using a Makefile to build your project; since you did not post it in its entirety I will not be able to help you 100%. But you will need to indicate to the linker that you want to link the static version of the boost_thread library; you don't actually explicitly list the file name.

    Something like this:
    Code:
    g++ MyObjectFile.o -static -pthread -lboost_thread
    The part above that is in bold text should be added to your LDFLAGS. I don't see a need to continue using BOOST_LIB_PATH and OBJS_ADDITIONAL.

  4. #4
    Join Date
    Aug 2010
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    Lancs, United Kingdom
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    Xubuntu 14.04 Trusty Tahr

    Re: boost static linking problem

    Quote Originally Posted by marcimatz View Post
    CFLAGS = -I./include -I./v_repExtRemoteApi -Wall -fPIC
    OPTION = -shared
    OBJS_ADDITIONAL = $(BOOST_LIB_PATH)/libboost_thread.a
    The static library is incompatible with the -shared -fPIC options. Either use the shared library, or compile you project -static (as per dwhitney67).

    From my understanding, I need to recompile libboost_thread.a
    Why do I need to recompile it? Because it is the 32 bit version?
    And the other question is, how do I recompile it? In the past I would download the library manually and build it manually from the install directory, but by installing it with 'sudo apt-get install libboost-all-dev' I got confused.

    Any help is appreciated, thanks a lot!
    If you really want to compile the library, and I suggest that you don't, then you would either need to get the package source or get the source from http://boost.org/ . The libboost-all-dev package itself does not provide the library source code.

  5. #5
    Join Date
    Sep 2012
    Beans
    2

    Re: boost static linking problem

    Thank you very much dwhitney67 and spjackson.

    Sorry, I didn't realize that I should have posted the full makefile. I am actually trying to build a library. Following is the makefile, modified according to your suggestions:

    CFLAGS = -I./include -I./mySources -Wall
    LDFLAGS = -lpthread -lboost_thread -ldl

    OBJS = mySources/fileA.o mySources/fileB.o mySources/fileC.o mySources/fileD.o mySources/fileE.o mySources/fileF.o mySources/fileG.o mySources/fileH.o mySources/fileI.o common/fileJ.o

    ECHO=@

    CFLAGS += -D__linux
    OPTION = -static
    EXT = so

    TARGET = libmyLibrary.$(EXT)

    all: myLibrarylib

    myLibrarylib: $(OBJS)
    @echo "Linking $(OBJS) to $(TARGET)"
    $(ECHO)$(CXX) $(CFLAGS) $(OBJS) $(OPTION) -o $(TARGET) $(LDFLAGS)

    %.o: %.c
    @echo "Compiling $< to $@"
    $(ECHO)$(CXX) $(CFLAGS) -c $< -o $@

    %.o: %.cpp
    @echo "Compiling $< to $@"
    $(ECHO)$(CXX) $(CFLAGS) -c $< -o $@

    clean:
    @echo "Cleaning $(OBJS) $(TARGET)"
    $(ECHO)rm -rf $(OBJS) $(TARGET)

    But the compiler now complains about several other things, for instance:

    **warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    **warning: Using 'gethostbyaddr' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    **/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o: In function `_start':
    (.text+0x20): undefined reference to `main'
    **/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../../lib/libboost_thread.a(thread.o): In function `void boost::call_once<void (*)()>(boost:nce_flag&, void (*)()) [clone .constprop.98]':
    (.text+0x73): undefined reference to `pthread_cond_wait'

    and so on.

    Sorry, now I am very confused

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