> Things I can think of: > > - 'install' can be assumed to be OK. > - 'mkdir' can be assumed to be OK. > - I am always using GNU Make, so all 3 checks around make are dispensable. > - I am always using GCC, so checking whether it accepts -g etc. is not necessary. > > Is there any article or blog post somewhere with speed-up hints for Autoconf? I imagine that you stumble on a target conflict for the software run time characteristics of the involved system checks. It seems that the control is limited for nicer system performance. Regards, Markus