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lib: feature deprecation warnings in gcc >= 4.3

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Add a deprecated attribute to functions and enum values that should not
be used anymore.
This uses a gcc 4.3 dialect, thus is only available for this version of
gcc and newer. Note that the _Pragma() keyword is introduced by C99, but
is available as part of the gcc dialect even when compiling in C89 mode.

It is still possible to disable deprecation at a calling module compile
time by defining CURL_DISABLE_DEPRECATION.

Gcc type checking macros are made aware of possible deprecations.

Some testing support Perl programs are adapted to the extended
declaration syntax.

Several test and unit test C programs intentionally use deprecated
functions/options and are annotated to not generate a warning.

New test 1222 checks the deprecation status in doc and header files.

Closes #9667
This commit is contained in:
Patrick Monnerat 2022-11-14 15:21:34 +01:00 • committed by Daniel Stenberg
parent 980510926d
commit 6967571bf2
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39 changed files with 771 additions and 243 deletions
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24
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<testcase>
<info>
<keywords>
source analysis
</keywords>
</info>
#
# Client-side
<client>
<server>
none
</server>
<name>
Verify deprecation statuses and versions
</name>
<command type="perl">
%SRCDIR/check-deprecated.pl %SRCDIR/..
</command>
</client>
</testcase>