Difference between revisions of "Developing On Mac"

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* [[Developer Guide]]
 
* [[Developer Guide]]
  
This article describes how to build Audacity from svn on Mac using XCode for your native PPC or Intel achritecture.  For most cases this is what you should be doing when developing.  It is worth noting that there is a different method for [[Building Universal Binaries]], which is what is need for building the versions of Audacity that are released to the public.
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This article describes how to build Audacity from svn on Mac using XCode for your native PPC or Intel achritecture.  For most cases this is what you should be doing when developing.  It is worth noting that there is a different method for [[Building Universal Binaries On Mac]], which is what is need for building the versions of Audacity that are released to the public.
  
 
==Latest position building from SVN HEAD==  
 
==Latest position building from SVN HEAD==  

Revision as of 16:00, 5 January 2011

Related articles:

This article describes how to build Audacity from svn on Mac using XCode for your native PPC or Intel achritecture. For most cases this is what you should be doing when developing. It is worth noting that there is a different method for Building Universal Binaries On Mac, which is what is need for building the versions of Audacity that are released to the public.

Latest position building from SVN HEAD

Prerequisites

You will need pkgconfig installed. By default this is not on your mac, but if you use fink or macports you may already have it in /sw/bin or /opt/bin. If you don't have it, you'll need to install fink. Then you can get it using fink with the command

sudo apt-get pkgconfig

Alternatively you can use macports to install it.

Building

Generally it seems easier to build a native PPC or Intel version than a Universal Binary. This scenario is reported to build from SVN HEAD as a Universal Binary on both Power PC and Intel Mac on OS X 10.5.1, using Xcode 3 and either wxWidgets 2.6.4 or 2.8.11, or the OS X 10.5.1 wxWidgets shared library. The general principles are:

1 Setup wxWidgets
1.1 -Create a wx directory in your audacity directory. For example: $HOME/audacity/wx
1.2 -If for some reason you are using wxMac 2.8.10, Patch the wxMac2.8.10 by doing the following
cd /path/to/wxMac-2.8.10

patch -p1 < /path/to/audacityrepos/mac/wxMac-2.8.10.patch

1.3 -Build wxWidgets from the command line. Make a build directory inside the wxWidgets directory and from there run (without the line breaks):
../configure --disable-shared --enable-universal_binary
--prefix=/path/to/audacity-beta/wx/ --enable-static --enable-unicode 
--disable-dependency-tracking --disable-monolithic --enable-debug

For wxWidgets 2.6.x:
  1. add --with-expat=builtin  to the above
  2. in utils/wxrc/Makefile add -mmacosx-version-min=10.4  to the CXX = g++ line (25)
  3. change the #define of ICONV_CHAR_CAST in src/common/strconv.cpp to:
    #define ICONV_CHAR_CAST(x) ((const char **)(x))

2. Do make followed by make install (by typing 'make', then 'make install'. If you have the wx-prefix outside of your home directory you may need 'sudo make install' instead, which will prompt you for a password.)
3. Open the audacity.xcodeproj file. You should create a text file called Debug_Static.xcconfig in the same directory as the project file, and add the line to this text file to include the path you specified as --prefix when building wxMac. For example 'WXPREFIX = /path/to/audacity/wx'.
3.5. If you get an error saying that pkg-config is required, you need to add the path of pkg-config on your system to the XCode settings by adding the line 'PATH = /sw/bin:$PATH' (if you use fink) to the .xcconfig file (in the project's XCode settings folder. It may also be in /opt/bin if you use macports vs fink.
4. Compile Audacity using Xcode. Open the latest Xcode project file and update it if required. In the list of targets do a "Get Info" on Audacity and Configure. You may need to change a few "User-Defined" settings. Most of the Wx ones need changing to which version of wxWidgets you've chosen and the path that you set above in --prefix when building it. You may have to change the CONFIG_STATIC and CONFIG_UNICODE in Configure. Most of the settings required for these variables can be gained from running wx-config --libs, --ld or --cflags. Also note that if using OS X 10.6 you may have to set xcode to use gcc 4.0 instead of 4.2 in your project settings.
4.1 If you get an error related to libflac, you have libflac installed to /usr/local/lib, and Audacity is linking to this instead of the libflac that the project builds. To workaround this, rename /usr/local/lib/libFLAC.dylib and libFLAC++.dylib to something else. A more proper workaround would be changing the include and linker paths to remove /usr/local/lib.

Troubleshooting tips

These tips are by Paul Livesey who builds the Audacity Nightly Builds for Mac, copied from this post on the Compiling Audacity Forum.

  • Install pkg-config and make sure it's in your path; If it's not in your path Xcode won't find it and nothing will build
  • Ensure that you have wxMac installed and that you know where it is - you can use the libraries that Apple provide but they're old and not great
  • Do not try and build Audacity from the configure script, because you won't get a fully working universal binary - use the Xcode project instead. Open the Xcode project either from the command line or via the Finder.
  • If wxMac is not installed to /usr/local you will have to set it up yourself. Either open Xcode like this:
    xcodebuild -target Audacity -configuration "Release Static" WX_PREFIX=/path/wxMac/installed/to
    or set it in xcode via the appropriate .xcconfig file or the WX_PREFIX variable in the project
  • If Audacity fails to build due to missing configure macros you will need to add a file called "dirlist" to /usr/share/aclocal . The dirlist should contain a list of extra places to check for m4 macros, one per line. Add the directory containing you pkg-config m4 macros - it should be something like:
    /PATH PKG-CONFIG INSTALLED TO/share/aclocal

Further Help

Please ask on the Compiling Audacity section of our Forum if you are stuck with any of the above. Before posting your question, please look at the full thread from which the above troubleshooting tips are taken.

Old information

For wxWidgets 2.6.x

  1. add --with-expat=builtin  to the above in utils/wxrc/Makefile
  2. add -mmacosx-version-min=10.4  to the CXX = g++ line (25)
  3. change the #define of ICONV_CHAR_CAST in src/common/strconv.cpp to:
    #define ICONV_CHAR_CAST(x) ((const char **)(x))
  4. Do make followed by make install.
  5. Open the audacity.xcodeproj file. You should create a text file called Debug_Static.xcconfig in the same directory as the project file, and add the line to this text file to include the path you specified as --prefix when building wxMac. For example 'WXPREFIX = /path/to/audacity/wx'.
  6. If you get an error saying that pkg-config is required, you need to add the path of pkg-config on your system to the XCode settings by adding the line 'PATH = /sw/bin:$PATH' (if you use fink) to the .xcconfig file (in the project's XCode settings folder. It may also be in /opt/bin if you use macports vs fink.
  7. Compile Audacity 1.3.4 using Xcode. Open the latest Xcode project file and update it if required. In the list of targets do a "Get Info" on Audacity and Configure. You may need to change a few "User-Defined" settings. Most of the Wx ones need changing to which version of wxWidgets you've chosen and the path that you set above in --prefix when building it. You may have to change the CONFIG_STATIC and CONFIG_UNICODE in Configure. Most of the settings required for these variables can be gained from running wx-config --libs, --ld or --cflags.

If further problems are encountered: please view this thread  on the Audacity Forum .


Broken script to build Universal Binary

A script  was available that built a Universal Binary version of Audacity on OS X 10.4. The script started with a wxMac-2.6.4 tarball, downloaded a fresh copy of Audacity from CVS, compiled both targets separately, merged them into the universal binary, and finally made the disk image.

As of 1 Nov 08 the script was broken, Audacity head being built using wx 2.8.10.