I was trying to compile expect for an old OS today and got stuck with the following error when linking
ld: Cannot find -lexpect545
It turns out that the problem with the default Makefile is to just creating libexpect.so.1 which is a dynamic link lib. But there is no recipe to create libexpect545.so.
Fortunately, The fix is pretty easy. All I had to do is to link libexpect545.so to libexpect.so.1 with the following command:
ln -s libexpect.so.1 libexpect545.so
or if you are using static linking... try the following:
ln -s libexpect.a libexpect545.a
Yeah, I know. This is super annoying. How come they don't do it correctly. I probably should put mine up on Github just to track it.
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