[ python-Bugs-1464444 ] ctypes should be able to link with installed libffi

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Bugs item #1464444, was opened at 2006-04-04 21:42
Message generated for change (Comment added) made by doko
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Category: Extension Modules
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Matthias Klose (doko)
Assigned to: Thomas Heller (theller)
Summary: ctypes should be able to link with installed libffi

Initial Comment:
ctypes always uses the included libffi implementation
(which should be updated to current GCC HEAD). Pleae
add an option to build and link against a libffi, which
is installed on the system.

attached is a hack to just always build using the
installed libffi. I'm unsure how to find the correct
ffi implementation (maybe check for LIBFFI_H defined in
the ffi header?), and where to implement this check
(configure.ac --with-system-ffi=/usr?).


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>Comment By: Matthias Klose (doko)
Date: 2006-04-05 00:43

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It's not an external dependency, if it's not found. The size
is not the argument. For distributors it's an additional
maintainance burden to update copies of libraries. Security
advisories for zlib (and pcre?) show this.

patch updated.


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Comment By: Martin v. Löwis (loewis)
Date: 2006-04-05 00:14

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Why is it desirable to link with the system ffi? That just
adds an external dependency, for a negligable space saving
(on x86, libffi.so.4.0.1 is 7840 bytes).

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