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Rebuilding Cygwin From Sources


Perhaps someone who knows can confirm that I've got this right:

The executables in a Cygwin download can be much older than the download
date, where "much" > 3 years.

This suggests that executables are only rebuilt when their own sources
change. Previously built executables can continue to be bundled into
downloadable packages, even if the version of gcc in the download is
much newer.

Therefore, it is not reasonable to attempt to rebuild the executables in
a download using the sources and gcc in the same download, and expect an
*exact* reconstruction.

(And that's before thinking about the compilation date strings that end
up in the executables, or the CFLAGS arguments to the various configure
scripts which also aren't necessarily obvious.)

If I know an exact rebuild isn't possible, I won't try to achieve it
before kludging the source :-)


Alan Carter

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