Fixes and Tips

After finding so many useful tips and bug-fixes on forums and blogs, I decided to finally start listing the things I have figured out so that all you other crazy programmers can save some time. Below you'll find some things that took me a while to figure out. Some of these tips may exist elsewhere online, but I thought they were worth reproducing here.

Compiling Portaudio on Mac OS X 10.5/6

9-30-2009

I recently upgraded to Snow Leopard, so I had trouble compiling the Portaudio audio I/O library. Make sure you have the Mac SDK in /Developer/SDKs/MacOSX10.5. This comes with the version of XCode (3.1 I believe) that came with Leopard, which you should be able to download online as well. I also have a /Developer/SDKs/MacOSX10.6 directory which came with the version of XCode (3.2) that comes with Snow Leopard.

Per the instruction for compiling on Mac OSX on the Portaudio website, run "./configure" from the portaudio directory. Configure should complete successfully if you have installed XCode. The next step is to run "make". If you are running on a 64bit architecture, this will result in compilation errors similar to the following:

...

cc1: warnings being treated as errors

src/common/pa_dither.c: In function 'PaUtil_Generate16BitTriangularDither':

src/common/pa_dither.c:73: warning: right shift count >= width of type

src/common/pa_dither.c:74: warning: right shift count >= width of type

src/common/pa_dither.c: In function 'PaUtil_GenerateFloatTriangularDither':

src/common/pa_dither.c:100: warning: right shift count >= width of type

src/common/pa_dither.c:101: warning: right shift count >= width of type

lipo: can't figure out the architecture type of: /var/folders/Yb/YbisVQwbFFiUBYFUlwO1yU+++TI/-Tmp-//cc52JJ8X.out

make: *** [src/common/pa_dither.lo] Error 1

...

We are getting type size errors. The configure script correctly identified sizeof(long int) to be 8 bytes on our system; however, the 32bit systems that the make file is also compiling for don't like this. To fix this, we need to edit the Makefile in the portaudio directory:

1. If you want to compile for 64bit systems, remove the 32bit architectures, "-arch ppc" and "-arch i386" from the CFLAGS and the LDFLAGS lists. I also removed "-arch ppc64" since I don't have any use for it right now.

2. If you want to compile for the 32bit architectures, remove "-arch ppc64" and "-arch x86_64" from CFLAGS/LDFLAGS. Then change "-DSIZEOF_LONG=8" to "-DSIZEOF_LONG=4" under the list of CFLAGS.

Now just run "make clean" and then "make" and it should all compile.