I have a project which will be built on both 64-bit and 32-bit machines. Is there a way to determine what type of machine I am building on from the makefile (like an environment variable) so that I can build differently according to architecture? -- View this message in context: http://www.nabble.com/Determining-64-bit-or-32-bit-in-Makefile-tp14257170p14257170.html Sent from the gcc - Help mailing list archive at Nabble.com.