Changeset 630308d for chapter04

Timestamp:

03/31/2021 10:41:38 AM (3 years ago)

Author:

Xℹ Ruoyao <xry111@…>

Branches:

ml-11.0, multilib

Children:

1ebfd6e4

Parents:

0dfc2f5

git-author:

Thomas Trepl <thomas@…> (03/31/2020 10:25:23 AM)

git-committer:

Xℹ Ruoyao <xry111@…> (03/31/2021 10:41:38 AM)

Message:

MultiLib: Merge changes from trunk

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/branches/multilib@11801 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter04/settingenviron.xml (modified) (7 diffs)

chapter04/settingenviron.xml

@@ -33 +33 @@
 
   <para>The new instance of the shell is a <emphasis>non-login</emphasis>
-  shell, which does not read the <filename>/etc/profile</filename> or
-  <filename>.bash_profile</filename> files, but rather reads the
+  shell, which does not read, and execute, the conten of <filename>/etc/profile</filename> or
+  <filename>.bash_profile</filename> files, but rather reads, and executes, the
   <filename>.bashrc</filename> file instead. Create the
   <filename>.bashrc</filename> file now:</para>
@@ -47 +47 @@
 export LFS LC_ALL LFS_TGT PATH</literal>
 EOF</userinput></screen>
-
 <screen arch="ml_32,ml_x32,ml_all"><userinput>cat &gt; ~/.bashrc &lt;&lt; "EOF"
 <literal>set +h
@@ -60 +59 @@
 EOF</userinput></screen>
 
+  <variablelist>
+    <title>The meaning of the command line options in <filename>.bashrc</filename></title>
+
+    <varlistentry>
+      <term><parameter>set +h</parameter></term>
+      <listitem>
   <para>The <command>set +h</command> command turns off
   <command>bash</command>'s hash function. Hashing is ordinarily a useful
@@ -71 +76 @@
   available without remembering a previous version of the same program in a
   different location.</para>
+      </listitem>
+    </varlistentry>
 
+    <varlistentry>
+      <term><parameter>umask 022</parameter></term>
+      <listitem>
   <para>Setting the user file-creation mask (umask) to 022 ensures that newly
   created files and directories are only writable by their owner, but are
@@ -77 +87 @@
   <function>open(2)</function> system call, new files will end up with permission
   mode 644 and directories with mode 755).</para>
+      </listitem>
+    </varlistentry>
 
+    <varlistentry>
+      <term><parameter>LFS=/mnt/lfs</parameter></term>
+      <listitem>
   <para>The <envar>LFS</envar> variable should be set to the chosen mount
   point.</para>
+      </listitem>
+    </varlistentry>
 
+    <varlistentry>
+      <term><parameter>LC_ALL=POSIX</parameter></term>
+      <listitem>
   <para>The <envar>LC_ALL</envar> variable controls the localization of certain
   programs, making their messages follow the conventions of a specified country.
@@ -86 +106 @@
   (the two are equivalent) ensures that everything will work as expected in
   the chroot environment.</para>
+      </listitem>
+    </varlistentry>
 
+    <varlistentry>
+      <term><parameter>LFS_TGT=(uname -m)-lfs-linux-gnu</parameter></term>
+      <listitem>
   <para>The <envar>LFS_TGT</envar> variable sets a non-default, but compatible machine
   description for use when building our cross compiler and linker and when cross
   compiling our temporary toolchain. More information is contained in
   <xref linkend="ch-tools-toolchaintechnotes" role=""/>.</para>
+      </listitem>
+    </varlistentry>
 
+    <varlistentry>
+      <term><parameter>PATH=/tools/bin:/bin:/usr/bin</parameter></term>
+      <listitem>
   <para>By putting <filename class="directory">/tools/bin</filename> ahead of the
   standard <envar>PATH</envar>, all the programs installed in <xref
@@ -97 +127 @@
   their installation. This, combined with turning off hashing, limits the risk
   that old programs are used from the host when the same programs are available in
-  the chapter 5 environment.</para>
+  the Chapter 5 environment.</para>
+      </listitem>
+    </varlistentry>
+
+    <varlistentry>
+      <term><parameter>export LFS LC_ALL LFS_TGT PATH</parameter></term>
+      <listitem>
+        <para>While the above commands have set some variables, in order
+        to make them visible within any sub-shells, we export them</para>
+      </listitem>
+    </varlistentry>
+
+  </variablelist>
 
   <para>Finally, to have the environment fully prepared for building the