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Building Mumble on Windows

Mumble has quite a few dependencies for building on Windows, and as the feature set grows, so does the list of dependencies. This page will try to detail the steps required to set up a Win32 build environment.

The paths used here equal the defaults assumed in the Mumble build files. You are free to change them, but you'll then need to change the file as well.

Also note, that if you are submitting a bug report for a selfbuilt executable, we expect you to either

  • Follow these instructions to the letter


  • Report any deviations from these instructions

Deviations means anything, from "I installed to the D: drive" to "I changed the gcc build options for Qt" or "I used another version of Speex".


Create C:\dev, and inside that directory create a file prep.bat containing:

@echo off
SET PATH=C:\dev\MinGW\bin;C:\dev\Qt4.2.2\bin;%PATH%
SET QTDIR=C:\dev\Qt4.2.2

Start a new command shell (run cmd.exe) and

CD \dev

Whenever something appears

like this

you're supposed to enter it in that command shell. When you later want to compile things, remember to call prep.bat first to set paths correctly.


Download Mumble SVN


Create a directory c:\dev\MinGW

Download the following files:

and unzip them all to the C:\dev\MinGW directory. GDB is an installer, install it to C:\dev\MinGW

cd \dev\MinGW\bin
copy mingw32-make.exe make.exe


Download and and unzip both to C:\dev\

cd \dev\boost_1_33_1
copy ..\boost-jam-3.1.13-1-ntx86\bjam.exe
bjam -s"TOOLS=mingw" --prefix=C:\dev\Boost install

This might take a while, but when done you'll have Boost installed. You can now safely delete the boost_1_33_1 and boost-jam directories.


Download and unzip to C:\dev. Rename the directory from qt-win-opensource-src-4.2.2 to Qt4.2.2

Go to C:\\dev\\Qt4.2.2\mkspecs\win32-g++ and open the file qmake.conf. Change the following lines:

QMAKE_LFLAGS		= -mthreads -Wl,-enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc


QMAKE_CFLAGS_RELEASE	= -O3 -march=pentium3 -mtune=pentium4 -mmmx -msse -ffast-math
QMAKE_CFLAGS_DEBUG	= -g -march=pentium3 -mtune=pentium4 -mmmx -msse -ffast-math
QMAKE_LFLAGS		= -Wl,-enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc

This will enable MMX and SSE instructions, and will also make sure Qt is tuned for modern architectures. It will also remove the exception threading support, which removes a few runtime dependencies.

cd \dev\Qt4.2.2

Microsoft Speech SDK

Go to and a bit down on the page is a download button for SpeechSDK51.exe. Download and install it to C:\dev\SpeechSDK


Download specific release Copy and build

Building Mumble and Murmur