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Editorial Team
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Asked: 2026-05-11T17:24:59+00:00

I’m ok with using Cygwin or MinGW, but I need to end up with

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I’m ok with using Cygwin or MinGW, but I need to end up with 64-bit code, not 32-bit. This is because I will be calling the DLL from 64-bit managed C#. I can’t seem to find and good references for setting up those tools to create 64-bit binaries. Also, it would be nice if the GCC was version 4, not version 3 as came with my Cygwin install.

An alternative would be some form of interprocess communication. I will research that, but what I laid out above is what I really want.

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1 Answer

  1. Editorial Team

    The 64-bit MinGW, based on (just released) gcc-4.4.0, is probably your best bet.
    (Since the mingw-w64 project on sourceforge.net is moving to mingw-w64.org it’s better to use mingw-w64.org)

    Detailed instructions:
    1. Download the archive
    2. Extract it somewhere under cygwin. In my case, top-level cygwin directory is C:\cygwin, I extracted the package into mingw directory, and ended up with the following contents in C:\cygwin\mingw (which is visible as /mingw under cygwin:

    $ ls -l /mingw
total 1
drwxr-xr-x+ 2 user None  0 May 10 08:32 bin
drwxr-xr-x+ 2 user None  0 May 10 05:45 include
drwxr-xr-x+ 2 user None  0 May 10 08:30 info
drwxr-xr-x+ 3 user None  0 May 10 08:30 lib
drwxr-xr-x+ 3 user None  0 May 10 05:45 libexec
drwxr-xr-x+ 4 user None  0 May 10 05:45 man
lrwxrwxrwx  1 user None 17 May 17 17:20 mingw -> x86_64-pc-mingw32
drwxr-xr-x+ 3 user None  0 May 10 04:16 share
drwxr-xr-x+ 5 user None  0 May 10 04:18 x86_64-pc-mingw32

    3. Now compile some C++ code. I used:

    // t.cc
#include <vector>
#include <string>

using namespace std;
int main()
{
    vector<string> vs;
    vs.push_back("abc");
}

    And compile it like this:

    $ /mingw/bin/x86_64-pc-mingw32-g++ t.cc

    4. Finally, verify the result is a Windows/x 64 executable, by running dumpbin /headers a.exe:

    Microsoft (R) COFF/PE Dumper Version 7.00.9466
Copyright (C) Microsoft Corporation.  All rights reserved.


Dump of file a.exe

PE signature found

File Type: EXECUTABLE IMAGE

FILE HEADER VALUES
            8664 machine (AMD64)
              10 number of sections
        4A10AF9F time date stamp Sun May 17 17:45:19 2009
           ABA00 file pointer to symbol table
             EC4 number of symbols
              F0 size of optional header
              27 characteristics
                   Relocations stripped
                   Executable
                   Line numbers stripped
                   Application can handle large (>2GB) addresses
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