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clarify that clang version number macros are marketing version #'s, not something useful. 

llvm-svn: 146672
This commit is contained in:
Chris Lattner 2011-12-15 19:06:36 +00:00
parent c44b5e469b
commit ee9c24a40b
1 changed files with 12 additions and 7 deletions
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19
clang/docs/LanguageExtensions.html
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@ -357,20 +357,25 @@ is used in the file argument.</p>
<dd>Defined when compiling with Clang</dd> <dd>Defined when compiling with Clang</dd>
<dt><code>__clang_major__</code></dt> <dt><code>__clang_major__</code></dt>
<dd>Defined to the major version number of Clang (e.g., the 2 in <dd>Defined to the major marketing version number of Clang (e.g., the
2.0.1).</dd> 2 in 2.0.1). Note that marketing version numbers should not be used to
check for language features, as different vendors use different numbering
schemes. Instead, use the <a href="#feature_check">feature checking
macros</a>.</dd>
<dt><code>__clang_minor__</code></dt> <dt><code>__clang_minor__</code></dt>
<dd>Defined to the minor version number of Clang (e.g., the 0 in <dd>Defined to the minor version number of Clang (e.g., the 0 in
2.0.1).</dd> 2.0.1). Note that marketing version numbers should not be used to
check for language features, as different vendors use different numbering
schemes. Instead, use the <a href="#feature_check">feature checking
macros</a>.</dd>
<dt><code>__clang_patchlevel__</code></dt> <dt><code>__clang_patchlevel__</code></dt>
<dd>Defined to the patch level of Clang (e.g., the 1 in 2.0.1).</dd> <dd>Defined to the marketing patch level of Clang (e.g., the 1 in 2.0.1).</dd>
<dt><code>__clang_version__</code></dt> <dt><code>__clang_version__</code></dt>
<dd>Defined to a string that captures the Clang version, including <dd>Defined to a string that captures the Clang marketing version, including
the Subversion tag or revision number, e.g., "1.5 (trunk the Subversion tag or revision number, e.g., "1.5 (trunk 102332)".</dd>
102332)".</dd>
</dl> </dl>
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