Jtdylktuy

I have the following error when trying to compile a c++ program while linking the library Libssh on Windows (packages libssh-common and libssh-devel both installed with cygwin). Clion doesn't give me an include error and cmake finds the library during the Cmake reload of Clion, but when compiling/linking it complains that the references are undefined.

Could someone point out my stupid mistake?
Thanks in advance!

Scanning dependencies of target main

[ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o

[100%] Linking CXX executable main.exe

CMakeFiles/main.dir/main.cpp.o:main.cpp:(.text+0x30): undefined reference to `ssh_new'

CMakeFiles/main.dir/main.cpp.o:main.cpp:(.text+0x30): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `ssh_new'

collect2: error: ld returned 1 exit status

my CmakeLisst.txt

add_executable(main main.cpp)

find_package(LIBSSH)

IF (LIBSSH_FOUND)

    message(${LIBSSH_VERSION})

    include_directories(${LIBSSH_INCLUDE_DIR})

    link_directories(${LIBSSH_INCLUDE_DIR})

    target_link_libraries(main ${LIBSSH_LIBRARIE})

endif ()

output Cmake reload

C:Usersseven.CLion2018.3systemcygwin_cmakebincmake.exe -DCMAKE_BUILD_TYPE= -DCMAKE_MAKE_PROGRAM=C:/cygwin64/bin/make.exe -DCMAKE_C_COMPILER=C:/cygwin64/bin/gcc.exe -DCMAKE_CXX_COMPILER=C:/cygwin64/bin/g++.exe -G "CodeBlocks - Unix Makefiles" "/cygdrive/c/Users/seven/Documents/github/Server control"

0.7.5

-- Configuring done

-- Generating done

-- Build files have been written to: /cygdrive/c/Users/seven/Documents/github/Server control/cmake-build-default-cygwin



[Finished]

main.cpp

#include <stdlib.h>

#include <iostream>

#define LIBSSH_STATIC 1

#include <libsshlibssh.h>



int main() {

    std::cout << "Hello world" << std::endl;

    ssh_session my_ssh_session = ssh_new();

    return 0;

}

--update 1--
CmakeOutput.log
github gist

--SOLUTION----

Had to change my cmakelist to the following

find_package(LIBSSH)

IF (LIBSSH_FOUND)

    message(${LIBSSH_VERSION})

    include_directories(${LIBSSH_INCLUDE_DIR})

    link_directories(${LIBSSH_LIBRARY_DIR})

    target_link_libraries(main -L${LIBSSH_LIBRARY} -lssh)

endif ()

Judging from make VEBOSE=1 output, the libssh library is indeed not linked against.

Try fixing these lines in your CMakeLists.txt:

link_directories(${LIBSSH_LIBRARY_DIR})

target_link_libraries(main ${LIBSSH_LIBRARY})

• The parameter to link_directories should be LIBSSH_LIBRARY_DIR, rather than LIBSSH_INCLUDE_DIR.


• The parameter to target_link_libraries should be LIBSSH_LIBRARY, rather than LIBSSH_LIBRARIE.

Or, alternatively:

link_directories(${LIBSSH_LIBRARY_DIR})

target_link_libraries(main -L${LIBSSH_LIBRARY_DIR} -lssh")