Life with Mac -- day three

Instead of installing a Linux Distro, plant a tiny GNU enivironment within osx will be more lightweight. The options are gentoo-prefix and MacPorts. But they are still too heavy to me, so I choosed cerbero, the build system of GStreamer SDK.

cerbero and GStreamer SDK

cerbero is written in python, and seems borrowing compiling rules from jhbuild - the build system of GNOME.

The steps are quite simple:

git clone cerbero repo from GStreamerSDK or GStreamer, the former corresponds to the SDK versions of GStreamer. You can configure it in ~/.cerbero/cerbero.cbc.

Here is my cerbero.cbc:

    # The compiled software will be installed to this path.
    prefix = '/Users/cee1/Lab/cerbero/output' 

    # Various building folders are under this path.
    home_dir = '/Users/cee1/Lab/cerbero/workdir'

And do a cerbero bootstrap:

    /path/to/cerbero/cerbero-uninstalled bootstrap

Install GStreamer SDK if you don’t want to compile many packages. GStreamer SDK contains many basic GNOME libraries, it can be downloaded from gstreamer.freedesktop.org/data/pkg/osx/, just install the following two .pkgs:
- gstreamer-1.0-X.X.X-universal.pkg
- gstreamer-1.0-devel-X.X.X-universal.pkg
Make a folder named $USER-scope in $HOME, put the environment file there, and do:

    echo ". $HOME/$USER-scope/environment" >> ~/.bashrc
    echo ". $HOME/.bashrc" >> ~/.bash_profile

    # Add some entries in $USER-scope
    cd $HOME/$USER-scope
    ln -s /Users/cee1/Lab/cerbero/output cerbero
    ln -s /Library/Frameworks/GStreamer.framework .

Now you can build software by /path/to/cerbero/cerbero-uninstalled shell, this will throw a bash with necessary environment variables set.

Recompile GStreamer SDK

In osx, it seems an executable file can link to more than one dynamic libraries with the same name. In practise, I found a binary linked to two glib s in different paths, and this may cause some strange problems. So I decided to re-compile a new GStreamer SDK. This will give me a more complete GStreamer and new enough libraries - I can just keep on glib in $HOME/$USER-scope.

To do this, I needs to hack cerbero to let it apply ‘$USER-scope/environment’ before doing each operation: github.com/cee1/cerbero-mac

Re-compile GStreamer SDK:

/path/to/cerbero/cerbero-uninstalled package gstreamer-1.0

# Modify po/Makefile if it complains about the GETTEXT version

# Ignore packing errors, the packages are not needed but the files under $USER-scope/cerbero are

If you need to hack

Here’re some useful hack tools

lldb: quite different to gdb in terms of command.
otool: readelf, objdump plus ldd. I used this the disassemble binary, when hack the binary by Hex Fiend.
dtruss: a strace like tool.

【templates】 Life with Mac -- day three -- 13 December 2013

cerbero and GStreamer SDK

Recompile GStreamer SDK

If you need to hack