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curl_off_t is a data type provided by the external libcurl include headers. It
6
is the type meant to be used for the curl_easy_setopt() options that end with
7
LARGE. The type is 64bit large on most modern platforms.
9
Transition from < 7.19.0 to >= 7.19.0
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-------------------------------------
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Applications that used libcurl before 7.19.0 that are rebuilt with a libcurl
13
that is 7.19.0 or later may or may not have to worry about anything of
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this. We have made a significant effort to make the transition really seamless
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You have have to take notice if you are in one of the following situations:
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o Your app is using or will after the transition use a libcurl that is built
20
with LFS (large file support) disabled even though your system otherwise
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o Your app is using or will after the transition use a libcurl that doesn't
24
support LFS at all, but your system and compiler support 64bit data types.
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In both these cases, the curl_off_t type will now (after the transition) be
27
64bit where it previously was 32bit. This will cause a binary incompatibility
28
that you MAY need to deal with.
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This new way has several benefits:
35
o Platforms without LFS support can still use libcurl to do >32 bit file
36
transfers and range operations etc as long as they have >32 bit data-types
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o Applications will no longer easily build with the curl_off_t size
40
mismatched, which has been a very frequent (and annoying) problem with
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Previously, before 7.19.0, the curl_off_t type would be rather strongly
47
connected to the size of the system off_t type, where currently curl_off_t is
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The strong connection to off_t made it troublesome for application authors
51
since when they did mistakes, they could get curl_off_t type of different
52
sizes in the app vs libcurl, and that caused strange effects that were hard to
53
track and detect by users of libcurl.
58
We opted to not bump the soname for the library unconditionally, simply
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because soname bumping is causing a lot of grief and moaning all over the
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community so we try to keep that at minimum. Also, our selected design path
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should be 100% backwards compatible for the vast majority of all libcurl
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If configure doesn't detect your case where a bump is necessary, re-run it
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with the --enable-soname-bump command line option!
added
removed
lib/README.curl_off_t
