Tukukkk

Before anything, I just want to say I am very new to CMAKE, almost never used it but now forced to...

I am trying to include snmp features in a previous project, using Net-SNMP library. But first, I wrote a minimalistic code just to test my functions. According to the library tutorial, this is how I must compile the code:

First, I must create object file:

gcc -I. `net-snmp-config --cflags`   -c -o tfsnmpset.o tfsnmpset.c

Then, I must generate the executable:

gcc -o tfsnmpset tfsnmpset.o `net-snmp-config --libs`

By doing this, the program compiles perfectly and everything is fine.
Now the project in which I want to incorporate that piece of code uses CMakeLists.txt to generate its makefile.

My question is, how do I include the following flags in my CMakeLists.txt?

When creating object files: `net-snmp-config --cflags` 

When generating executable: `net-snmp-config --libs`

I actually tried to build a library out of my code that uses Net-SNMP that I could just use in my main project:

cmake_minimum_required(VERSION 3.12)

project(snmp_daemon C)



set(CMAKE_C_STANDARD 99)

SET(CMAKE_C_COMPILER /usr/bin/gcc)

set(CMAKE_C_FLAGS  "${CMAKE_C_FLAGS} -I. `net-snmp-config --cflags`" )

add_library(tfsnmpset tfsnmp.c tfsnmp.h)

add_executable(snmp_daemon main.c ./tfsnmp.h)

target_link_libraries(snmp_daemon tfsnmpset)

The errors:

/media/user/xtra/apps/clion-2018.2.1/bin/cmake/linux/bin/cmake --build /home/fabrice/projects/snmp-daemon/cmake-build-debug --target snmp_daemon -- -j 2

[ 25%] Linking C static library libtfsnmpset.a

[ 50%] Built target tfsnmpset

[ 75%] Linking C executable snmp_daemon

libtfsnmpset.a(tfsnmp.c.o): In function `tfsnmpset':

/home/user/projects/snmp-daemon/tfsnmp.c:121: undefined reference to `snmp_parse_args'

/home/user/projects/snmp-daemon/tfsnmp.c:147: undefined reference to `snmp_get_do_debugging'

/home/user/projects/snmp-daemon/tfsnmp.c:147: undefined reference to `debugmsgtoken'

/home/user/projects/snmp-daemon/tfsnmp.c:147: undefined reference to `debugmsg'

/home/user/projects/snmp-daemon/tfsnmp.c:147: undefined reference to `debugmsgtoken'

/home/user/projects/snmp-daemon/tfsnmp.c:147: undefined reference to `debugmsg'

/home/user/projects/snmp-daemon/tfsnmp.c:194: undefined reference to `snmp_open'

/home/user/projects/snmp-daemon/tfsnmp.c:199: undefined reference to `snmp_sess_perror'

/home/user/projects/snmp-daemon/tfsnmp.c:207: undefined reference to `snmp_pdu_create'

/home/user/projects/snmp-daemon/tfsnmp.c:210: undefined reference to `snmp_parse_oid'

/home/user/projects/snmp-daemon/tfsnmp.c:211: undefined reference to `snmp_perror'

/home/user/projects/snmp-daemon/tfsnmp.c:214: undefined reference to `snmp_add_var'

/home/user/projects/snmp-daemon/tfsnmp.c:216: undefined reference to `snmp_perror'

/home/user/projects/snmp-daemon/tfsnmp.c:222: undefined reference to `snmp_close'

/home/user/projects/snmp-daemon/tfsnmp.c:230: undefined reference to `snmp_synch_response'

/home/user/projects/snmp-daemon/tfsnmp.c:236: undefined reference to `print_variable'

/home/user/projects/snmp-daemon/tfsnmp.c:239: undefined reference to `snmp_errstring'

/home/user/projects/snmp-daemon/tfsnmp.c:247: undefined reference to `fprint_objid'

/home/user/projects/snmp-daemon/tfsnmp.c:257: undefined reference to `snmp_sess_perror'

/home/user/projects/snmp-daemon/tfsnmp.c:262: undefined reference to `snmp_free_pdu'

/home/user/projects/snmp-daemon/tfsnmp.c:263: undefined reference to `snmp_close'

collect2: error: ld returned 1 exit status

CMakeFiles/snmp_daemon.dir/build.make:84: recipe for target 'snmp_daemon' failed

make[3]: *** [snmp_daemon] Error 1

CMakeFiles/Makefile2:72: recipe for target 'CMakeFiles/snmp_daemon.dir/all' failed

make[2]: *** [CMakeFiles/snmp_daemon.dir/all] Error 2

CMakeFiles/Makefile2:84: recipe for target 'CMakeFiles/snmp_daemon.dir/rule' failed

make[1]: *** [CMakeFiles/snmp_daemon.dir/rule] Error 2

Makefile:118: recipe for target 'snmp_daemon' failed

make: *** [snmp_daemon] Error 2