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Michael Caldwell wrote:
> Currently I'm trying to compile unixODBC, but freetds-devel does not include
> libtdsodbc.so.
Why not just use odbc32 instead? The interface is the same, you just
need to #include <windows.h> before #include <sql.h>. I have done with
with several packages (see libgda as an example).
> Was freetds compiled with the --with-unixodbc configure flag?
>
> How do I compile version 0.64?
Look at the Ports version 0.63 for clues; I haven't done 0.64 yet.
> In general what's the trick for compiling a .so under cygwin/w32/dll (when
> the author doesn't explicitly resolve the references, but relies on the
> linux kernel to resolve them at run time)?
You have to track down the dependencies and add them to the link command
yourself.
> Do I need to create an import lib?
Libtool will do this for you; otherwise, yes.
> I've noticed in a couple source patches that the libtool flag -no-undefined
> is added, I've tried that, but what else do I need to do?
All symbols must be resolved at link time, period. It can take work;
for example, KDE is notoriously bad about this, hence the big patches in
Ports (never mind the time involved).
You also need to make sure that -l flags come after all .o and .a files
in the link command; this is similar to the behaviour of -Wl,--as-needed
on current Linux systems. See Gentoo's as-needed doc for more info.
> Btw, what's the cygwin equivalent of ldd?
Try cygcheck /path/to/foo.{exe,dll}, but the following gives more exact
information:
objdump -p /path/to/foo.{exe,dll} | grep "DLL Name:" | sort -u | cut -d
' ' -f 3 | sed -e '/KERNEL32.dll/d' | xargs -r which
Yaakov
Cygwin Ports
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