未定义的符号引用，命令行中缺少 DSO

Question

I'm trying to compile the Lotech framework under Debian Jessie, but I'm can't seem to get past a specific point in compilation. I've searched the error messages that come up, and almost all of them seem to be resolved by installing or linking a missing dependency, but I can't figure out what that dependency is in this situation.

cp buildtmp.linux/liblt.a linux/
cd clients/glfw/ && make LTCFLAGS="-O3 -DNDEBUG -DLTLINUX " && cp ltclient ../../
make[1]: Entering directory `/home/jake/Desktop/copy-lotech-master/clients/glfw'
g++ -O3 -DNDEBUG -DLTLINUX  -I../../linux/include -L../../linux ltclient.cpp \
        -o ltclient -static-libstdc++ -static-libgcc ../../linux/liblt.a ../../linux/libpng.a ../../linux/libz.a ../../linux/liblua.a ../../linux/libvorbis.a ../../linux/libbox2d.a ../../linux/libglfw.a ../../linux/libGLEW.a ../../linux/libopenal.a ../../linux/libcurl.a -lX11 -lGL wrap_memcpy.o -Wl,--wrap=memcpy
/usr/bin/ld: ../../linux/libopenal.a(helpers.o): undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[1]: *** [ltclient] Error 1
make[1]: Leaving directory `/home/jake/Desktop/copy-lotech-master/clients/glfw'
make: *** [ltclient] Error 2

Answer 1

For me this does the trick

set (CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_CXX_LINK_EXECUTABLE} -ldl")

Useful links

Link1

Link2

Link3 <- Cmake how to find libraries

Link4

Link5

Answer 2

DSO means Dynamic Shared Object. Add the option "-lpthread" works for me.