Changeset a6be895

Timestamp:

09/01/2007 03:11:54 AM (17 years ago)

Author:

Jeremy Huntwork <jhuntwork@…>

Children:

4759793f

Parents:

944d1e4

Message:

Update the explanatory text for the use of '-m64'

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/branches/jh/BOOK@8364 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

Files:

• chapter01/changelog.xml (modified) (1 diff)
• chapter05/binutils-pass1.xml (modified) (3 diffs)

chapter01/changelog.xml

@@ -40 +40 @@
       <para>2007-08-31</para>
       <itemizedlist>
+        <listitem>
+          <para>[jhuntwork] - Update explanatory text for the use of -m64.</para>
+        </listitem>
         <listitem>
           <para>[jhuntwork] - Update explanatory text for GCC's --with-arch parameter.</para>

chapter05/binutils-pass1.xml

@@ -58 +58 @@
     </note>
 
-    <para>Test to see if the host is a multilib capable machine and set a variable
-    if it is. This ensures that only 64-bit binaries are built if using such a host.
-    </para>
+    <para>Test to see if the host is a 64-bit capable machine and set a variable
+    if it is.</para>
 
 <screen><userinput>test $(uname -m | grep 64) &amp;&amp; M64="-m64"</userinput></screen>
@@ -74 +73 @@
 
       <varlistentry>
-        <term><envar>CC="gcc -B/usr/bin/"</envar></term>
+        <term><envar>CC="gcc -B/usr/bin/ $M64"</envar></term>
         <listitem>
           <para>This forces <command>gcc</command> to prefer the linker from
@@ -81 +80 @@
           built here is not compatible with the host's <command>gcc</command>.
           </para>
+          <para>Also, if the cpu-type is 64-bit capable, the variable <envar>$M64</envar>
+          will contain the parameter <parameter>-m64</parameter>. Otherwise, the
+          variable is empty. The parameter forces <command>gcc</command> to build
+          64-bit binaries. Using that parameter here and for the next package
+          ensures creation of a linker, assembler and compiler that will in turn
+          create only 64-bit binaries. This is necessary since currently this book
+          does not support the creation of multilib systems, i.e., those with both
+          32-bit and 64-bit libraries. This will only make a difference on hosts that
+          are themselves multilib and employ a compiler that creates 32-bit binaries
+          by default.</para>
         </listitem>
       </varlistentry>