From 91d8e69d189e1f9a3da02826683cf42462714829 Mon Sep 17 00:00:00 2001
From: Xi Ruoyao <xry111@xry111.site>
Date: Sat, 8 Apr 2023 21:47:29 +0800
Subject: glibc: Clarify the reference to POSIX.1b and POSIX.1c

The thread functions are in POSIX.1c, not POSIX.1b.

Both POSIX.1b and POSIX.1c are named "extensions" (plural form).  And
POSIX.1b is titled "Real-time" instead of "Realtime".
---
 chapter08/glibc.xml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/chapter08/glibc.xml b/chapter08/glibc.xml
index ff655a89e..9f07b46eb 100644
--- a/chapter08/glibc.xml
+++ b/chapter08/glibc.xml
@@ -918,8 +918,9 @@ mkdir -pv /etc/ld.so.conf.d</userinput></screen>
         <listitem>
           <para>Dummy library containing no functions. Previously contained
           functions providing most of the interfaces specified
-          by the POSIX.1b Realtime Extension, now the functions are in
-          <filename class="libraryfile">libc</filename></para>
+          by the POSIX.1c Threads Extensions and the semaphore interfaces
+          specified by the POSIX.1b Real-time Extensions, now the functions
+          are in <filename class="libraryfile">libc</filename></para>
           <indexterm zone="ch-system-glibc libpthread">
             <primary sortas="c-libpthread">libpthread</primary>
           </indexterm>
@@ -941,7 +942,7 @@ mkdir -pv /etc/ld.so.conf.d</userinput></screen>
         <term><filename class="libraryfile">librt</filename></term>
         <listitem>
           <para>Contains functions providing most of the interfaces specified
-          by the POSIX.1b Realtime Extension</para>
+          by the POSIX.1b Real-time Extensions</para>
           <indexterm zone="ch-system-glibc librt">
             <primary sortas="c-librt">librt</primary>
           </indexterm>
-- 
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