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copied!<p>While <em>@karlphillip</em> method correct in general, you should take in mind some windows specified stuff:</p> <ol> <li><p>While you compile <em>@karlphillip</em>'s code you get linker error produced by <code>MinGw</code> standard library file:</p> <pre><code>c:/mingw/bin/../lib/gcc/mingw32/4.6.1/../../../libmingw32.a(main.o): In function `main': C:\MinGW\msys\1.0\src\mingwrt/../mingw/main.c:73: undefined reference to `WinMain@16' </code></pre> <p>That is not your <code>main</code>, that is <code>libmingw32.a</code>'s main. And it expects <code>WinMain</code> as entry point of <em>your</em> code. The thing is that <code>WinMain</code> is default entry point for windows application defined by Microsoft. <code>libmingw32.a</code> defines actual main, that is called from actual entry point. That main does some stuff and than calls <code>WinMain</code>. But you have no <code>WinMain</code> defined, obviously. </p> <p>In this simple example you needn't standard library actually, then you can drop standard library and compile above code with command line</p> <pre><code>gcc -Wl,-subsystem,console 1.S -nostdlib </code></pre> <p>It should be equivalent Qt setting <code>QMAKE_CXXFLAGS+=-nostdlib</code></p> <p>Then code above compiles, and... <em>segfaults</em>. Then go to point 2:</p></li> <li><p><code>int 80h</code> is specific linux system call. Seems it doesn't work on windows. You should invoke <code>WriteConsole</code> on windows to write to <code>stdin</code>. But as a "proof of concept" you can run the following code:</p> <pre><code>.text .globl main main: movl $1, %eax ret </code></pre> <p>This will set exit code of program to 1.</p></li> </ol> <p><strong>EDIT</strong> If you want <em>Hello world</em> example, compiled with standard library included, you can try this:</p> <pre><code>.data hello: .string "Hello World\n" .text .global _WinMain@16 _WinMain@16: push $hello call _puts add $4, %esp ret </code></pre> <p>Compile with <code>gcc 1.S</code></p>

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