Well, I'm back to bug those who actually know something. I received the book "Game Programming All in One" and, after recovering from shock and setting things up (according to the book), I ran the examples. Lo and behold, when ever I change and recompile, I get these errors: cc1.exe C:\Dev-Cpp\My Projects\dev-cpp\chapter04\tankwar\cc1.exe unrecognized command line option "-fsave-memoized" C:\Dev-Cpp\My Projects\dev-cpp\chapter04\tankwar\Makefile.win [Build Error] [main.o] Error 1 If you know what's wrong, thx in advance!

Remove the -fsave-memoized command line option?
What version of dev-cpp are you using? What version of GCC does it run on?

Oops, stupid me!

The allegro devpack is version 4.0.3, Dev-C++ is 4.9.9.2(beta), using Mingw/GCC 3.4.2 . As the first post says, the examples run ok, until you change the code and recompile, in which case you get the errors mentioned above.

Thanks for the help, Fruny!

Apparently, the project options were set with the -fsave-memoized. Disabling it fixed everything!

thx again!