Dimitar Zhekov wrote:

DZ>> ... MinGW: define alloca to __builtin_alloca MAF> Why?

To avoid warnings about alloca() being implicitly declared (approx. 25 from a total of 30) in the Win32 build. It's strange why alloca() isn't declared in MinGW...

Mmm... I have not seem any warning and I am using a rather old version of Mingw (the last released by Mumit Khan). What version are you using?