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build: port to MinGW and fix symlink bugs

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MinGW problem reported by Theo Veenker in
<http://mm.icann.org/pipermail/tz/2013-September/020378.html>.
The patched code should work even on POSIXish hosts
where 'link' and 'symlink' fail for whatever reason,
e.g., if the destination file system is VFAT.
Also, the patch fixes some bugs when symlinks are used.
* Makefile (CFLAGS): Mention HAVE_LINK in the comment.
(TZDSRCS): Add asctime.o, since MinGW lacks asctime.
(TZDOBJS): Add asctime.c.
* private.h (HAVE_LINK): Default to 1.
* zic.c (link) [!HAVE_LINK]: New macro.
(symlink) [!HAVE_SYMLINK]: New macro.
(dolink): Fix some bugs when 'link' fails but 'symlink' succeeds.
Fall back on copying when both fail.
* NEWS: Document the above.
This commit is contained in:
Paul Eggert
2013-09-25 17:49:49 -07:00
parent a5851f83d3
commit dad4eed8a8
4 changed files with 69 additions and 21 deletions
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6
NEWS
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@@ -3,6 +3,12 @@ News for the tz database
Unreleased, experimental changes
Changes affecting 'zic'
'zic' now runs on platforms that lack both hard links and symlinks.
(Thanks to Theo Veenker for reporting the problem, for MinGW.)
Also, fix some bugs on platforms that lack hard links but have symlinks.
Changes affecting the build procedure
The 'leapseconds' file is again put into the tzdata tarball.