From 94d24f1af684d37b9e1c6ad9b54c98609140eb1f Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <jwakely@redhat.com>
Date: Thu, 6 Jul 2023 16:25:47 +0100
Subject: [PATCH] libstdc++: Document --enable-cstdio=stdio_pure [PR104299]
libstdc++-v3/ChangeLog:
PR libstdc++/104299
* doc/xml/manual/configure.xml: Describe stdio_pure argument to
--enable-cstdio.
* doc/html/manual/configure.html: Regenerate.
(cherry picked from commit b90a70984a9beee39b41f842b56926f9db2069ca)
---
libstdc++-v3/doc/html/manual/configure.html | 11 ++++++++---
libstdc++-v3/doc/xml/manual/configure.xml | 11 ++++++++---
2 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/libstdc++-v3/doc/html/manual/configure.html b/libstdc++-v3/doc/html/manual/configure.html
index dd9e6ef3579d..c81e5993b087 100644
--- a/libstdc++-v3/doc/html/manual/configure.html
+++ b/libstdc++-v3/doc/html/manual/configure.html
@@ -38,9 +38,14 @@
</p><pre class="programlisting">
--with-gxx-include-dir=/foo/H-x86-gcc-3-c-gxx-inc/include/4.4-20090404</pre></dd><dt><span class="term"><code class="code">--enable-cstdio</code></span></dt><dd><p>This is an abbreviated form of <code class="code">'--enable-cstdio=stdio'</code>
(described next).
- </p></dd><dt><span class="term"><code class="code">--enable-cstdio=OPTION</code></span></dt><dd><p>Select a target-specific I/O package. At the moment, the only
- choice is to use 'stdio', a generic "C" abstraction.
- The default is 'stdio'. This option can change the library ABI.
+ </p></dd><dt><span class="term"><code class="code">--enable-cstdio=OPTION</code></span></dt><dd><p>Select a target-specific I/O package. The choices are 'stdio'
+ which is a generic abstraction using POSIX file I/O APIs
+ (<code class="function">read</code>, <code class="function">write</code>,
+ <code class="function">lseek</code>, etc.), and 'stdio_pure' which is similar
+ but only uses standard C file I/O APIs (<code class="function">fread</code>,
+ <code class="function">fwrite</code>, <code class="function">fseek</code>, etc.).
+ The 'stdio_posix' choice is a synonym for 'stdio'.
+ The default is 'stdio'. This option can change the library ABI.
</p></dd><dt><span class="term"><code class="code">--enable-clocale</code></span></dt><dd><p>This is an abbreviated form of <code class="code">'--enable-clocale=generic'</code>
(described next).
</p></dd><dt><span class="term"><code class="code">--enable-clocale=OPTION</code></span></dt><dd><p>Select a target-specific underlying locale package. The
diff --git a/libstdc++-v3/doc/xml/manual/configure.xml b/libstdc++-v3/doc/xml/manual/configure.xml
index 7ff07aea8864..1b8c37ce2a91 100644
--- a/libstdc++-v3/doc/xml/manual/configure.xml
+++ b/libstdc++-v3/doc/xml/manual/configure.xml
@@ -74,9 +74,14 @@
</listitem></varlistentry>
<varlistentry><term><code>--enable-cstdio=OPTION</code></term>
- <listitem><para>Select a target-specific I/O package. At the moment, the only
- choice is to use 'stdio', a generic "C" abstraction.
- The default is 'stdio'. This option can change the library ABI.
+ <listitem><para>Select a target-specific I/O package. The choices are 'stdio'
+ which is a generic abstraction using POSIX file I/O APIs
+ (<function>read</function>, <function>write</function>,
+ <function>lseek</function>, etc.), and 'stdio_pure' which is similar
+ but only uses standard C file I/O APIs (<function>fread</function>,
+ <function>fwrite</function>, <function>fseek</function>, etc.).
+ The 'stdio_posix' choice is a synonym for 'stdio'.
+ The default is 'stdio'. This option can change the library ABI.
</para>
</listitem></varlistentry>
--
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