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configure: deprecate builds with small curl_off_t

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If curl_off_t turns out to be smaller than 8 bytes,
--with-n64-deprecated needs to be used to allow the build to
continue. This is to highlight the fact that support for such builds is
going away next year.

Also mentioned in DEPRECATED.md

Closes #9605
This commit is contained in:
Daniel Stenberg 2022-09-27 11:13:21 +02:00
parent 72652c0613
commit 267668308b
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12
configure.ac
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@ -3388,6 +3388,18 @@ AC_CHECK_TYPE(long long,
)
if test ${ac_cv_sizeof_curl_off_t} -lt 8; then
AC_ARG_WITH(n64-deprecated,dnl
AS_HELP_STRING([--with-n64-deprecated],[confirm you realize support for systems without 64 bit data types is going away]),
if test X"$withval" != Xno; then
OPT_N64_AWARE=$withval
fi
)
if test -z "$OPT_N64_AWARE"; then
AC_MSG_ERROR([support for systems without 64 bit curl_off_t is deprecated, use --with-n64-deprecated until then])
fi
fi
# check for ssize_t
AC_CHECK_TYPE(ssize_t, ,
AC_DEFINE(ssize_t, int, [the signed version of size_t]))

4
docs/DEPRECATE.md
View File

@ -23,6 +23,10 @@ compilers since the 1990s.
Starting in 8.0.0 (March 2023), the plan is to drop support.
Starting in 7.86.0, building curl with configure requires the additional flag
`--with-n64-deprecated` if the `curl_off_t` type on your system is smaller
than 8 bytes, in an attempt to highlight these plans to affected users.
## NSS
We remove support for building curl with the NSS TLS library in August 2023.