waf searches for wrong ns-3 libs

[fam4r]

Hello,

using this scenario template with ndnSIM 2.8 (ns-3.30.1) and running waf configure I ran into an error.

$ ./waf configure
Setting top to                           : /home/ndn/simulation
Setting out to                           : /home/ndn/simulation/build
Checking for 'gcc' (C compiler)          : /usr/bin/gcc
Checking for 'g++' (C++ compiler)        : /usr/bin/g++
Checking C++ compiler version            : 9.3.0
Checking supported CXXFLAGS              : -std=c++14
Checking supported LINKFLAGS             : -fuse-ld=gold
Checking for program 'pkg-config'        : /usr/bin/pkg-config
Checking for pkg-config version >= '0.0.0' : yes
Checking for ns3-core                      : not found
NS-3 or one of the required NS-3 modules not found
NS-3 needs to be compiled and installed somewhere.  You may need also to set PKG_CONFIG_PATH variable in order for configure find installed NS-3.
For example:
    PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH ./waf configure

(complete log in /home/ndn/simulation/build/config.log)

Then I inspected config.log:

$ cat build/config.log
[...]
Checking for ns3-core
['/usr/bin/pkg-config', '--cflags', '--libs', 'libns3-dev-core-optimized']
err: Package libns3-dev-core-optimized was not found in the pkg-config search path.
Perhaps you should add the directory containing `libns3-dev-core-optimized.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libns3-dev-core-optimized' found

not found
from /home/ndn/simulation: The configuration failed

Using PKG_CONFIG_PATH variable option didn't help.

I investigated more and observed that filenames are different!
Since ndnSIM 2.8 (ns-3.30.1) the compiled files have the following prefix

libns3.30.1-

But in the older versions (like ndnSIM 2.7 which is based on ns-3.29) the compiled files were following the prefix searched by waf:

libns3-dev-

I also tried to run a simulation example directly into the ns-3 folder and it works, so I guess this is the problem.

If needed, I can post here build logs, you tell me.

I installed ndnSIM as described into ndnsim.net.

Debug info:

• OS: Ubuntu 20.04
• ndnSIM version: 2.8
• ns-3 version 3.30.1

[cawka]

As a quick hack, you can modify .waf-tools/ns3.py to reference libns3.30.1- prefix. I will try to make a bit more general version of it / fix base NS3 to revert back to the old convention.

[cawka]

Just in case, you can pull changes from base NS-3 and it should fix the issue

[babapgc]

As a quick hack, you can modify .waf-tools/ns3.py to reference libns3.30.1- prefix. I will try to make a bit more general version of it / fix base NS3 to revert back to the old convention.

as fam4r diagnose the problem correctly. With libns3.30.1- prefix it doesn't work for me. I have to do libns3.35.- in .waf-tools/ns3.py file. I think latest ns3 update the library and this prefix no longer work.