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Within libtool .la files, the dependency_libs variable serves two purposes:
1) For runtime libs, executables linked against the library will be
linked against all listed dependencies as well, e.g.
libtool --mode=link --tag=CXX g++ -o kfoo.exe foo.o -lkdeui
will work because libtool will turn that into:
g++ -o kfoo.exe foo.o /usr/lib/libkdeui.dll.a /usr/lib/libkdecore.dll.a
... /usr/lib/libkdefx.dll.a ... /usr/lib/qt3/lib/libqt-mt.dll.a ...
2) When using lt_dlopen and friends (usually on modules), libltdl will
resolve the library's dependencies at load time.
Since on Cygwin, all DLLs must have all dependencies resolved at link
time, this is a completely unnecessary waste of resources. This is
especially noticeable with aKode/aRts/KDE, which use an internal libltdl.
Since one does not usually link against modules, cygport has now been
patched to set dependency_libs to empty in this case. But for now, and
again after the next upcoming upload, the following is a workaround:
find /usr/lib -name '*.la' -exec grep -l shouldnotlink=yes '{}' + | \
xargs sed -i -e '/^dependency_libs=/d'
After the second-to-next upload, this will not be necessary, as cygport
will do this automatically from now on. Enjoy a faster KDE!
Yaakov
Cygwin Ports
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