Recurrent Problems on Leopard

poll() doesn't work

see #13259.

environment variables become blank between configure and build phases

This manifests as error messages like: unable to execute -DNDEBUG: No such file or directory. ($CC is an empty string, so what was meant to be the the first argument to the compiler is now the first thing on the command line, and is treated as a command name by the shell.) Seems to frequently occur when building Python modules; see #13930.

Usually, this problem can be worked around by simply running the install command again.

ld: cycle in dylib re-exports with /usr/X11/lib/libGL.dylib

This is the result of a misfeature in Leopard's linker. See Apple's Technical Q&A on the subject ​here. It can generally be fixed by adding the following to the portfile inside a platform darwin 9 block:

configure.ldflags-append 	-dylib_file \
			/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:\
			/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib