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libstdc++: Fix example preprocessor command in FAQ [PR103877]

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libstdc++-v3/ChangeLog:

	PR libstdc++/103877
	* doc/xml/faq.xml: Add '-x c++' to preprocessor command.
	* doc/html/faq.html: Regenerate.
This commit is contained in:
Jonathan Wakely 2022-01-04 15:54:16 +00:00
parent e09366718a
commit cebe875f6f
2 changed files with 2 additions and 2 deletions
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2
libstdc++-v3/doc/html/faq.html
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@ -456,7 +456,7 @@
<code class="varname">CPLUSPLUS_CPP_SPEC</code> in
the gcc config headers for your target (and try changing them to
see what happens when building complicated code). You can also run
<span class="command"><strong>g++ -E -dM - &lt; /dev/null"</strong></span> to display
<span class="command"><strong>g++ -E -dM -x c++ /dev/null</strong></span> to display
a list of predefined macros for any particular installation.
</p><p>This has been discussed on the mailing lists
<a class="link" href="http://gcc.gnu.org/cgi-bin/htsearch?method=and&amp;format=builtin-long&amp;sort=score&amp;words=_XOPEN_SOURCE+Solaris" target="_top">quite a bit</a>.

2
libstdc++-v3/doc/xml/faq.xml
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@ -580,7 +580,7 @@
<varname>CPLUSPLUS_CPP_SPEC</varname> in
the gcc config headers for your target (and try changing them to
see what happens when building complicated code). You can also run
<command>g++ -E -dM - &lt; /dev/null"</command> to display
<command>g++ -E -dM -x c++ /dev/null</command> to display
a list of predefined macros for any particular installation.
</para>
<para>This has been discussed on the mailing lists