Qt Mobility Library Question on OS X
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If it would ever be possible to create an installer for Qt Mobility, it would be great.
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On OS X the environment variable to set is DYLD_LIBRARY_PATH.
LD_LIBRARY_PATH is for Linux (and probably some Unix systems too).
[EDIT - fixed typo]
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Interesting. I will try that. Shouldn't this be automated?
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Automated? I don't understand....
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It seems like with all of these problems that people are having with Mobility that some sort of installer would really be helpful.
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Ah, ok. That's quite true. I never used it though I cannot comment further. I only stumbled over the (DY)LD_LIBRARY_PATH once I switched to the Mac :-)
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Using that kind of concatenation of LD_LIBRARY_PATH is dangerous (at least in Linux). You really should make sure the LD_LIBRARY_PATH does not contain empty path elements ever.
This is due to the loader evaluating LD_LIBRARY_PATH to find libraries an executable depends on. For some reason a empty path element (the thing between the ':' or ':' and the end of the string) is considered to be the current directory. So if you have LD_LIBRARY_PATH set to "/some/path::/some/other/path" then the loader will check the current directory for libraries. This is a security issue as anybody can make you run code for them if they can get you to start any executable while in a directory where they can put a library.
As I said before: This is the case in Linux. I am not sure the MacOS loader behaves in the same way... So check before following this potentially dangerous advice.
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This can prevent creating new empty paths:
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if [ "x$DYLD_LIBRARY_PATH" = "x" ]; then
export DYLD_LIBRARY_PATH="/path/to/my/lib"
else
export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:/path/to/my/lib"
fi
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Again I would emphasize the great need for some sort of installer to minimize these risks. Perhaps adding it and all its dependencies to aptitude?
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There is no aptitude in a standard Mac OS X installation.
On a Debian or Ubunut box there might be already a package repository (known as PPA: Personal Package Archive), that can be added to apt/sources.list. I'm pretty sure they will be in the official repositories sometime the packages are sort-of stable.
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Do you have any sort of general timeline idea of when that will happen?
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Sorry, no. I'm neither into the planning of the Trolls on finishing Qt Mobility nor into that of Launchpad for their Ubuntu plans. I would not depend on anything you find on the net, unless it's from Launchpad or Nokia.
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Can I add:
@if [ "x$DYLD_LIBRARY_PATH" = "x" ]; then
export DYLD_LIBRARY_PATH="/path/to/my/lib"
else
export DYLD_LIBRARY_PATH="$DYLD_LIBRARY_PATH:/path/to/my/lib"
fi@directly to my .profile file and only change the two file paths?
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Yes, you can. And additionally to .bashrc too.
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Great to know, I will try it. Thanks.