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Asked: 2026-05-31T19:52:19+00:00

I just installed the boost 1.49 version on ubuntu and the process went smooth.

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I just installed the boost 1.49 version on ubuntu and the process went smooth. however, now when I am running any of my files(hence I am not posting the c++ file because it is happening with every file that use libboost_date_time), I get the following error:

./test.shared.array.exe: error while loading shared libraries: libboost_date_time.so.1.49.0: cannot open shared object file: No such file or directory

I checked to see where boost.build installed the library and I see the libboost_date_time.so.1.49.0 in /usr/local/

why then would I be getting such error. how can i fix the issue.

these are the contents of the /usr/local/boost_1_49_0

/usr/local/boost_1_49_0$ ls
b2      boost-build.jam  bootstrap.bat  index.htm   libs                rst.css
bin.v2  boostcpp.jam     bootstrap.log  index.html  LICENSE_1_0.txt     status
bjam    boost.css        bootstrap.sh   INSTALL     more                tools
boost   boost.png        doc            Jamroot     project-config.jam

and this is what I have in

/usr/local/lib$ ls
libboost_chrono.a              libboost_prg_exec_monitor.so.1.49.0
libboost_chrono.so             libboost_program_options.a
libboost_chrono.so.1.49.0      libboost_program_options.so
libboost_date_time.a           libboost_program_options.so.1.49.0
libboost_date_time.so          libboost_random.a
libboost_date_time.so.1.49.0   libboost_random.so
libboost_exception.a           libboost_random.so.1.49.0
libboost_filesystem.a          libboost_regex.a
libboost_filesystem.so         libboost_regex.so
libboost_filesystem.so.1.49.0  libboost_regex.so.1.49.0
libboost_graph.a               libboost_serialization.a
libboost_graph.so              libboost_serialization.so
libboost_graph.so.1.49.0       libboost_serialization.so.1.49.0
libboost_iostreams.a           libboost_signals.a
libboost_iostreams.so          libboost_signals.so
libboost_iostreams.so.1.49.0   libboost_signals.so.1.49.0
libboost_locale.a              libboost_system.a
libboost_locale.so             libboost_system.so
libboost_locale.so.1.49.0      libboost_system.so.1.49.0
libboost_math_c99.a            libboost_test_exec_monitor.a
libboost_math_c99f.a           libboost_thread.a
libboost_math_c99f.so          libboost_thread.so
libboost_math_c99f.so.1.49.0   libboost_thread.so.1.49.0
libboost_math_c99l.a           libboost_timer.a
libboost_math_c99l.so          libboost_timer.so
libboost_math_c99l.so.1.49.0   libboost_timer.so.1.49.0
libboost_math_c99.so           libboost_unit_test_framework.a
libboost_math_c99.so.1.49.0    libboost_unit_test_framework.so
libboost_math_tr1.a            libboost_unit_test_framework.so.1.49.0
libboost_math_tr1f.a           libboost_wave.a
libboost_math_tr1f.so          libboost_wave.so
libboost_math_tr1f.so.1.49.0   libboost_wave.so.1.49.0
libboost_math_tr1l.a           libboost_wserialization.a
libboost_math_tr1l.so          libboost_wserialization.so
libboost_math_tr1l.so.1.49.0   libboost_wserialization.so.1.49.0
libboost_math_tr1.so           ocaml
libboost_math_tr1.so.1.49.0    perl
libboost_prg_exec_monitor.a    python2.7
libboost_prg_exec_monitor.so   R
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1 Answer

  1. Editorial Team

    Your system probably isn’t looking for the .so’s in this path.

    Check /etc/ld.so.conf to see which directories are searched for so’s.
    /usr/local is an odd location for those to be installed in. I’d expect /usr/lib or /usr/local/lib.

    [EDIT to reflect new information]

    Since you have installed boost in /usr/local/lib (I’m assuming all the .so’s are under there) and this path is already in /etc/ld.so.conf.d you can try running ldconfig:

    sudo ldconfig

    Make sure you are compiling with the right libraries, e.g.:

    gcc test.shared.array.cpp -lboost_date_time

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