qt4-mac: ld: library not found for -ldbus-1

[ryandesign (Ryan Carsten Schmidt)]

qt4-mac fails to build on my Lion machine with Xcode 4.3.3.

ld: library not found for -ldbus-1

$ clang -v
Apple clang version 3.1 (tags/Apple/clang-318.0.61) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin11.4.2
Thread model: posix

I suspect the problem is because this version of ​clang does not honor CPATH or LIBRARY_PATH.

If you don't have access to a machine with Lion and Xcode 4.3 to test with, you can also reproduce the problem by using MacPorts clang-2.9 or 3.0 which experience the same issue.

sudo port build qt4-mac configure.compiler=macports-clang-3.0

If it's too difficult to fix qt4-mac to properly find dbus without CPATH and LIBRARY_PATH, you could use the compiler_blacklist_versions portgroup to blacklist these old versions of clang.

[michaelld (Michael Dickens)]

In my (limited) testing, macports-clang-3.0 honors CPATH, but 2.9 does not; the issue here is I think really with LIBRARY_PATH. I'm already blacklisting Apple clang 318.0.58 and older for this reason (and, other compilers for other reasons); so, it seems like I need to bump this up to 318.0.61 . Or, as you say, figure out how to not use CPATH and LIBRARY_PATH. I just added configure tests for CPATH and others, but did not include LIBRARY_PATH. I'll add another test for that one too (seems like a wise idea; do not compile using a non-blacklisted compiler if it does not support the necessary options).

[michaelld (Michael Dickens)]

Fixed in r102344. I added a configure check for LIBRARY_PATH, so hopefully tickets such as this one related to not using a supported compiler for building qt4-mac will be easier to understand and fix (and, faster to detect for end users).