Hello list. I am attempting to build llvm, clang, compile-rt, and lldb using Cygwin. (don't ask) I am using the 3.3 tag. I have the following problems. 1 - Running configure, PATH=/usr/bin CC=/bin/gcc CXX=/bin/g++ ../llvm-3-3/configure --enable-optimized I see the following message: configure: WARNING: mmap() of a fixed address required but not supported I have seen various postings on the Web that there is an issue with configure, Cygwin and mmap(). I didn't see this issue in the FAQs. Is this warning a concern?