ns3 build failed in Fedora !!

[Mohit Ranjan Basak]

Hi Tom ,

I am building ns-3.37 in RHEL fedora (8.6) , but it is failing with below error:

[  0%] Linking CXX executable ../../../../build/src/config-store/examples/ns3.37-config-store-save-optimized
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_mul'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpz_limbs_modify'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_invert'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_powm_itch'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpz_limbs_write'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpn_cnd_add_n'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_div_r'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpn_cnd_sub_n'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpz_limbs_finish'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_invert_itch'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_powm'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_mul_itch'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpz_roinit_n'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_div_r_itch'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_add_1_itch'
//usr/lib64/libhogweed.so.4: undefined reference to `__gmpn_sec_add_1'
//usr/lib64/libgnutls.so.30: undefined reference to `__gmpz_limbs_read'
collect2: error: ld returned 1 exit status
gmake[2]: *** [src/config-store/examples/CMakeFiles/config-store-save.dir/build.make:114: ../build/src/config-store/examples/ns3.37-config-store-save-optimized] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:4888: src/config-store/examples/CMakeFiles/config-store-save.dir/all] Error 2
gmake: *** [Makefile:146: all] Error 2
Finished executing the following commands:
cd cmake-cache; cmake --build . -j 1 ; cd ..

the library and the reference is present in the system.

[mbasak@ilptldvctodev80 ns-3.37]$ ls //usr/lib64/libhogweed.so.4
//usr/lib64/libhogweed.so.4
[mbasak@ilptldvctodev80 ns-3.37]$ strings //usr/lib64/libhogweed.so.4 | grep __gmpn_sec_mul
__gmpn_sec_mul_itch
__gmpn_sec_mul
[mbasak@ilptldvctodev80 ns-3.37]$

Please help to resolve this issue.

Thanks & Regards,

Mohit.

[Gabriel Ferreira]

The string you checked in libhogweed is probably an exported symbol that gets resolved at runtime.
To check if that is the case, you can use 'objdump -x library.so > outputfile.txt', then read if the symbol has an address or is marked as undefined (*UND*).

As far as I know, gmp stands for libgmp (GNU Multi Precision). 

You probably need to link to libgmp too (assuming this is needed for cryptographic algorithms due to large keys).