building nix-1.9 on cygwin 64

traceback

GrayWorm@Missandei ~/nix-1.9pre4103_1f795f9
$ make
  CXX    src/nix-hash/nix-hash.o
  CXX    src/libmain/shared.o
  CXX    src/libstore/build.o
  CXX    src/libstore/derivations.o
  CXX    src/libstore/gc.o
  CXX    src/libstore/globals.o
  CXX    src/libstore/local-store.o
  CXX    src/libstore/misc.o
  CXX    src/libstore/optimise-store.o
  CXX    src/libstore/pathlocks.o
  CXX    src/libstore/references.o
  CXX    src/libstore/remote-store.o
  CXX    src/libstore/store-api.o
  CXX    src/libutil/affinity.o
  CXX    src/libutil/archive.o
  CXX    src/libutil/hash.o
  CXX    src/libutil/serialise.o
  CXX    src/libutil/util.o
In file included from /usr/lib/gcc/x86_64-pc-cygwin/4.9.2/include/c++/cstdio:42:0,
                 from src/libutil/util.hh:12,
                 from src/libutil/util.cc:3:
src/libutil/util.cc: In function ‘std::string nix::runProgram(nix::Path, bool, const Strings&, const string&)’:
src/libutil/util.cc:945:10: error: no matching function for call to ‘nix::Pipe::Pipe(__FILE*&)’
     Pipe stdout, stdin;
          ^
src/libutil/util.cc:945:10: note: candidates are:
In file included from src/libutil/util.cc:3:0:
src/libutil/util.hh:230:7: note: nix::Pipe::Pipe()
 class Pipe
       ^
src/libutil/util.hh:230:7: note:   candidate expects 0 arguments, 1 provided
src/libutil/util.hh:230:7: note: nix::Pipe::Pipe(const nix::Pipe&)
src/libutil/util.hh:230:7: note:   no known conversion for argument 1 from ‘__FILE* {aka __sFILE64*}’ to ‘const nix::Pipe&’
src/libutil/util.hh:230:7: note: nix::Pipe::Pipe(nix::Pipe&&)
src/libutil/util.hh:230:7: note:   no known conversion for argument 1 from ‘__FILE* {aka __sFILE64*}’ to ‘nix::Pipe&&’
src/libutil/util.cc:946:12: error: request for member ‘create’ in ‘__getreent()->_reent::_stdout’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
     stdout.create();
            ^
src/libutil/util.cc:947:31: error: request for member ‘create’ in ‘__getreent()->_reent::_stdin’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
     if (!input.empty()) stdin.create();
                               ^
src/libutil/util.cc: In lambda function:
src/libutil/util.cc:951:25: error: request for member ‘writeSide’ in ‘__getreent()->_reent::_stdout’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
         if (dup2(stdout.writeSide, STDOUT_FILENO) == -1)
                         ^
src/libutil/util.cc:954:28: error: request for member ‘readSide’ in ‘__getreent()->_reent::_stdin’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
             if (dup2(stdin.readSide, STDIN_FILENO) == -1)
                            ^
src/libutil/util.cc: In function ‘std::string nix::runProgram(nix::Path, bool, const Strings&, const string&)’:
src/libutil/util.cc:970:12: error: request for member ‘writeSide’ in ‘__getreent()->_reent::_stdout’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
     stdout.writeSide.close();
            ^
src/libutil/util.cc:974:15: error: request for member ‘readSide’ in ‘__getreent()->_reent::_stdin’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
         stdin.readSide.close();
               ^
src/libutil/util.cc:975:25: error: request for member ‘writeSide’ in ‘__getreent()->_reent::_stdin’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
         writeFull(stdin.writeSide, input);
                         ^
src/libutil/util.cc:976:15: error: request for member ‘writeSide’ in ‘__getreent()->_reent::_stdin’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
         stdin.writeSide.close();
               ^
src/libutil/util.cc:979:36: error: request for member ‘readSide’ in ‘__getreent()->_reent::_stdout’, which is of pointer type ‘__FILE* {aka __sFILE64*}’ (maybe you meant to use ‘->’ ?)
     string result = drainFD(stdout.readSide);
                                    ^
mk/patterns.mk:2: recipe for target 'src/libutil/util.o' failed
make: *** [src/libutil/util.o] Error 1

util.cc

...

string runProgram(Path program, bool searchPath, const Strings & args,
    const string & input)
{
    checkInterrupt();

    /* Create a pipe. */
    Pipe stdout, stdin;
    stdout.create();
    if (!input.empty()) stdin.create();

    /* Fork. */
    Pid pid = startProcess([&]() {
        if (dup2(stdout.writeSide, STDOUT_FILENO) == -1)
            throw SysError("dupping stdout");
        if (!input.empty()) {
            if (dup2(stdin.readSide, STDIN_FILENO) == -1)
                throw SysError("dupping stdin");
        }

        Strings args_(args);
        args_.push_front(program);
        auto cargs = stringsToCharPtrs(args_);

        if (searchPath)
            execvp(program.c_str(), (char * *) &cargs[0]);
        else
            execv(program.c_str(), (char * *) &cargs[0]);

        throw SysError(format("executing ‘%1%’") % program);
    });

    stdout.writeSide.close();

    /* FIXME: This can deadlock if the input is too long. */
    if (!input.empty()) {
        stdin.readSide.close();
        writeFull(stdin.writeSide, input);
        stdin.writeSide.close();
    }

    string result = drainFD(stdout.readSide);

    /* Wait for the child to finish. */
    int status = pid.wait(true);
    if (!statusOk(status))
        throw ExecError(format("program ‘%1%’ %2%")
            % program % statusToString(status));

    return result;
}

...

util.hh

...

class AutoCloseFD
{
    int fd;
public:
    AutoCloseFD();
    AutoCloseFD(int fd);
    AutoCloseFD(const AutoCloseFD & fd);
    ~AutoCloseFD();
    void operator =(int fd);
    operator int() const;
    void close();
    bool isOpen();
    int borrow();
};


class Pipe
{
public:
    AutoCloseFD readSide, writeSide;
    void create();
};

...