I am using mingw32-make to compile a project to Windows, which depends on a project called libevent2. I keep receiving this error -
util.h:69:25: fatal error: sys/socket.h: No such file or directory Obviously a file from the Linux API is trying to be included, which won't work on Windows. Upon further investigation I find however that this file should only be included if WIN32 isn't defined.
#ifdef WIN32 #include <winsock2.h> #else #include <sys/socket.h> #endif You should use _WIN32 and may also want to check for __CYGWIN__
#if defined _WIN32 || defined __CYGWIN__ Are you sure there's nothing undefining WIN32? My installation of MinGW (4.6.1 at this site) definitely defines it:
C:\temp>gcc -E -dM test.c | find /i "win" #define _WIN32 1 #define __WINT_MAX__ 65535 #define _WINT_T #define __WINT_MIN__ 0 #define __WIN32 1 #define __WINNT 1 #define __WINNT__ 1 #define __WIN32__ 1 #define __SIZEOF_WINT_T__ 2 #define WIN32 1 // <-- right here #define __WINT_TYPE__ short unsigned int #define WINNT 1 Try passing the -E -dM options to verify if your MinGW compiler is (or isn't) pre-defining the WIN32 macro.
Note that strictly speaking, WIN32 should not be predefined by the compiler (since it's in the user's namespace) - only _WIN32 should. WIN32 should be set by the SDK being used and/or by the build environment - that's the way it works in Microsoft's compilers.
For example, there's the following sequence in windef.h"
#ifndef WIN32 #define WIN32 #endif and /D "WIN32" is put into Visual Studio C++ projects by default.
See https://stackoverflow.com/a/662543/12711 for more details.
GCC does not define WIN32 on Windows when it compiles based on a C++ standard, such as -std=c++11 or other year. However, _WIN32 is defined. When GNU extensions are enabled, which is normally the default or when specific GNU extensions are enabled with -std=gnu++??, then WIN32 is defined together with _WIN32.
Use _WIN32 instead of WIN32 when possible. When it is impractical to replace it, either use the default GNU extensions without any switch or specific year with -std=gnu++?? or define this macro in your build system. E.g. in the Makefile:
> ifeq ($(OS),Windows_NT) > CXXFLAGS += -DWIN32 > endif 