C++ TFS 1.x compilation - long Linking time

[Gesior.pl]

Anyone got idea why 'linking' may take 45 seconds on dedicated servers (Debian 7 and Debian 8.9)?

I tested it on 2 dedics (i4790K, 32-64GB ram, SSD NVME) and both compile files fast, but linking takes around 45 second.
After single line change in 1 file, it compiles file in 3 seconds and then I must wait 45 seconds for linker.
Tested it with g++ 4.9, 5, 6. Tested with "cotire" on/off.

At my home PC with Ubuntu 16.04 linking takes around 1 second.

After compilation on dedic, binary file size is 19MB, on home PC it's 9MB.

Any ideas what I can change in CMake project to make it link faster?

 

[slaw]

The world is going down... Gesior is asking for help!

 

[Gesior.pl]

@slawkens
Solved!

Someone added flags to TFS project on dedic:

-march=native -ggdb3 -Ofast -fstack-protector -fstack-protector-all -fno-var-tracking-assignments

-flto - link-time optimizer