Compilation on Mac OS X

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This document describes how to build Stellarium from sources on Mac OS X. This process ought to improve over time.

The set of instructions was written for the 0.10.4 release and using an Intel machine with Leopard (10.5). The process has been validated on 10.6, 10.7 and 10.8.x.


Prepare Mac OS X to build Stellarium

Since Stellarium version 0.10.6, you need a machine with Mac OS X 10.5. These instructions were tested with Mac OS X 10.6 (latest version 10.6.8) or later[1].

  1. Install the latest version of Apple's Developer Tools:
  2. Install the latest version of Qt Libraries from the dmg (4.8.3 at the time these instructions were written):
  3. Install macports:
  4. Install cmake using macports: $ sudo port install cmake
  5. Install bazaar using macports: $ sudo port install bzr

Compiling dependencies to build an universal binary

Note: This step is needed only if you need an universal binary. If you don't intend to create an universal package you can skip this and going to the next section Building Stellarium itself.

We have to compile the dependencies with special flags to be able to generate an universal binary.

In case you are compiling in a Leopard or Snow Leopard machine you have to recompile stellarium dependencies making use of the oldest system libraries (in our case those in 10.4 aka Tiger). We need the following compilation flags:

a. We want to generate a single binary for both intel and ppc architectures so:

-arch i386 -arch ppc

b. We want to link with the old framework and system libraries:

-mmacosx-version-min=10.4 -isysroot /Developer/SDKs/MacOSX10.4u.sdk/ (Not sure if this is really needed)

Compiling dependencies

- Libiconv: It's important to compile libiconv in the first place because gettext depends on it. Get the latest release from here: Uncompress the file in your favorite directory and configure and compile like this:

 $ ./configure --prefix=/usr CFLAGS='-arch i386 -arch ppc -mmacosx-version-min=10.4 -isysroot /Developer/SDKs/MacOSX10.4u.sdk/'
 $ make
 $ make install

- Gettext: Get the latest release from here: . Uncompress the file in your favorite directory and configure and compile like this:

 $ ./configure CFLAGS='-arch i386 -arch ppc -mmacosx-version-min=10.4 -isysroot /Developer/SDKs/MacOSX10.4u.sdk/'
 $ make
 $ make install

At the moment of writing these steps 4.6.2 is the latest version of Qt. Trolltech provides support from MacOS 10.4 to 10.6 so our binaries will be constrained by this. I went through these instructions in a Leopard machine. To compile in Snow Leopard it's necessary to consider the following notes copied from the Qt 4.6.0 changelog:

  • Gcc 4.2 is used by default. Configure with -platform macx-g++40 to select 4.0.
  • Using the 10.4u SDK requires gcc 4.0.
  • Configuring for the Cocoa port (-cocoa) produces 64-bit binaries by default. Use the -arch flags to override.
  • Building for ppc64 is no longer supported by the gcc tool chain.
  • Building for ppc is still supported.

I haven't tried to generate universal binaries on a Snow Leopard machine. We have to validate these steps.

Building Stellarium itself

Create a build directory with your favorite shell (the following directory is just an example, you can pick any name and path you want)

$ mkdir ~/Development
$ cd ~/Development

Getting Stellarium source code

In that directory checkout the sources with the bzr command

$ bzr branch lp:stellarium stellarium

For more details, see the Bazaar checkout instructions.

If you have already done it once, you have just to update your copy using this bzr command

$ bzr pull

Time to compile Stellarium

We setup the build directory

$ cd stellarium 
$ mkdir -p builds/macosx
$ cd builds/macosx

We run cmake[2]...

$ cmake ../..

... and compile

$ make


IMPORTANT: you should delete or move aside the old before each new build:

$ rm -r

Then make the Mac OS X application:

$ make install
$ make macosx_bundle

The macosx_bundle target includes a perl script that makes use of otool and install_name_tool to:

  1. read the link dependencies of
  2. copy those dependencies into the app (.frameworks and .dylibs)
  3. recurse on those copied-in dependencies, stopping at a point where system libraries are called for

We recommend Qt Creator

The core group of developers of stellarium uses QtCreator as main IDE, its integration with Qt and the possibility of having a consistent tool through different platforms makes it the most suitable option for our goals.


All kinds of things might go wrong!

We will write here the most frequent problems and the possible solutions found by the developers.


  1. If you build Stellarium 0.10.6+ by yourself on Mac OS X 10.4.11 then you need edit info.plist file then change value for LSMinimumSystemVersion key. You'll have to get older versions of Qt (Carbon) too, if you want to create universal binaries (PPC and Intel).
  2. If you've installed the Qt Creator dmg instead of the Qt Libraries, cmake will complain that it can't find Qt and you'll have to pass as an option the location of your QtSDK installation, e.g. $ cmake -DQT_QMAKE_EXECUTABLE=~/Development/QtSDK/Desktop/Qt/4.8.2/gcc/bin/qmake ../.. Other things will later go wrong too, especially when making the application bundle.
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