On 10 November 2013 07:45, awsdert wrote: > The code is on http://code.google.com/p/zxstuff/source/checkout and here is > the Code::Blocks Project zxStuff.zip > <http://gcc.1065356.n5.nabble.com/file/n983603/zxStuff.zip> , my problem is > that the compiler thinks zxVECTOR_resize & zxVECTOR_opAdd are undefined and > just stop there (the stopping is desired btw). I cannot for the life of me > figure out why this is. Noone can give a sensible answer until you show the linker output, but it probably means you haven't linked the relevant objects into your project.