Hi Patrick On Sat, Jun 30, 2012 at 9:41 AM, Patrick L wrote: > Hi, I am using Cygwin 1.7.11 i686 on Windows 7 PC. I am trying to compile a > Linux C++ application on Cygwin. > > When I use the ./configure command, Cygwin shows the following error messages: > > checking winsock2.h usability... no > checking winsock2.h presence... yes > configure: WARNING: winsock2.h: present but cannot be compiled (snip) > winsock2.h and ws2tcpip.h are Windows header files for Windows network/socket > programming. Why Cygwin tries to pull in Windows header files when I am > compiling a Linux C++ application?
Because the configure script is trying to find them. I suspect this is a program (or its configure script) which "thinks" that Cygwin is Windows. (It appears to be testing explicitly for winsock2.h; it shouldn't) > How can I fix this issue? Tell the authors of the program that Cygwin is not Windows. Take a look at config.log; it should contain the error message from the compiler when it tried to use winsock2.h Search for checking winsock2.h usability in config.log; there should be a short C source, a gcc invocation and an error message. Csaba -- GCS a+ e++ d- C++ ULS$ L+$ !E- W++ P+++$ w++$ tv+ b++ DI D++ 5++ The Tao of math: The numbers you can count are not the real numbers. Life is complex, with real and imaginary parts. "Ok, it boots. Which means it must be bug-free and perfect. " -- Linus Torvalds "People disagree with me. I just ignore them." -- Linus Torvalds -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
