I am compiling libmicrohttpd for Windows but the tests can not be built due to use of the pipe(2) posix function. Here are the points.
* OS: Windows 10 latest insider build.
* Compiler Environment: msys2/mingw-w64 with mingw-w64 headers and crt from git.
* Compiler: GCC 10.1.0 target x86_64-w64-mingw32
* Configure options: --disable-examples --enable-https --enable-shared --enable-static --enable-asserts
* Error happens at `make check`.
* Compiler output: libmicrohttpd/src/microhttpd/test_upgrade_large.c:922:12: warning: implicit declaration of function 'pipe'
If you need any further information I will try to help. Thank you.