From dac0f591d2e2ee633d0bc6c3d2b4dbac33ce6f25 Mon Sep 17 00:00:00 2001
From: Jeremy Utley <jeremy@linuxfromscratch.org>
Date: Fri, 12 Sep 2003 23:16:54 +0000
Subject: Added descriptions to grep configure switches

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@2795 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
---
 chapter05/grep-inst.xml | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'chapter05/grep-inst.xml')

diff --git a/chapter05/grep-inst.xml b/chapter05/grep-inst.xml
index 6051ffd2e..8db7e3e42 100644
--- a/chapter05/grep-inst.xml
+++ b/chapter05/grep-inst.xml
@@ -8,6 +8,17 @@
 <para><screen><userinput>./configure --prefix=/tools \
 &nbsp;&nbsp;&nbsp;&nbsp;--disable-perl-regexp --with-included-regex</userinput></screen></para>
 
+<para>The meaning of the configure switches:</para>
+
+<itemizedlist>
+<listitem><para><userinput>--disable-perl-regexp</userinput>: This makes sure
+that grep does not get linked against a PCRE library that may be present on
+the host, but would not be available once we enter the chroot environment.</para></listitem>
+<listitem><para><userinput>--with-included-regex</userinput>: This ensures that
+grep uses it's internal regular expression code.  Without it, it will use
+the code from glibc, which is known to be slightly buggy.</para></listitem>
+</itemizedlist>
+
 <para>Compile the programs:</para>
 
 <para><screen><userinput>make </userinput></screen></para>
-- 
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