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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang user's Manual: need to explicitly state that -pedantic does not warn on all language extensions"
href="https://bugs.llvm.org/show_bug.cgi?id=51473">51473</a>
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<th>Summary</th>
<td>Clang user's Manual: need to explicitly state that -pedantic does not warn on all language extensions
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>12.0
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Windows NT
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>pavel.morozkin@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Clang user's manual: need to explicitly state that -pedantic does not warn on
all language extensions. In many cases when clang -pedantic compiles the code
containing extensions the diagnostics are missing. Hence, the end user assumes
that the situation around -pedantic is the same as in gcc: "This does not mean
that _all_ non-ISO constructs get warnings or errors". If this is indeed true,
then there is a need to explicitly state in clang user's manual
(<a href="https://clang.llvm.org/docs/UsersManual.html">https://clang.llvm.org/docs/UsersManual.html</a>) that -pedantic does not warn on
all language extensions.
Text before:
-pedantic
Warn on language extensions.
Text after:
-pedantic
Warn on language extensions.
Caution: This does not mean that _all_ non-ISO C constructs get warnings.
Reason: detection of any failure to conform to ISO C is considered to not be
worth the effort required.</pre>
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