Linker error (on linux) if libevent 1.4.X is installed

[agordon]

Hello,

Using 'dub' to create a sub 'vibe.d' application, the linking fails with the following:

$ dub
Checking dependencies in '/home/gordon/projects/test'
Building configuration "application", build type debug
Compiling...
Linking...
/data/gordon/usr/lib/gcc/x86_64-unknown-linux-gnu/4.8.2/../../../../x86_64-unknown-linux-gnu/bin/ld: cannot find -levent_pthreads
collect2: error: ld returned 1 exit status
--- errorlevel 1
Error: Link command failed with exit code 1

Run 'dub help' for usage information.

The reason is that on this (old) system, 'libevent' still uses the old stable version 1.14.x instead of the 2.0.x version - and it does not include the "event_pthreads" library.

I do not know if 'dub' has a way to specify minimum required version (of a system library) during installation or compilation. Perhaps, at the very least, mention in the documentation or README that libevent version 2.0.X is required ?

-gordon