Add a patch to binutils to enable LTO with gcc-4.9.0.

Remove omit-frame-pointer in gcc-pass2 and Chapter 6 gcc. 


git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@10561 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter01/changelog.xml

@@ -38,6 +38,11 @@
     <listitem>
       <para>2014-05-11</para>
       <itemizedlist>
+        <listitem>
+          <para>[bdubbs] - Add a patch to binutils to enable LTO 
+          with gcc-4.9.0. Fixes
+          <ulink url="&lfs-ticket-root;3569">#3569</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[bdubbs] - Update bootscripts for eudev.</para>
         </listitem>
@@ -45,8 +50,8 @@
           <para>[bdubbs] - Add gcc patch for upstream changes.</para>
         </listitem>
         <listitem>
-          <para>[bdubbs] - Change explanation for using 
-          omit-frame-pointer in gcc-pass2. Fixes
+          <para>[bdubbs] - Remove omit-frame-pointer in gcc-pass2
+          and Chapter 6 gcc. Fixes
           <ulink url="&lfs-ticket-root;3562">#3562</ulink>.</para>
         </listitem>
       </itemizedlist>

chapter01/whatsnew.xml

@@ -238,6 +238,9 @@
     <listitem>
       <para>&bc-memory-leak-patch;</para>
     </listitem>
+    <listitem>
+      <para>&binutils-lto-patch;</para>
+    </listitem>
     <listitem>
       <para>&coreutils-shuf-segfault-patch;</para>
     </listitem>

chapter03/patches.xml

@@ -34,6 +34,14 @@
       </listitem>
     </varlistentry>
 
+    <varlistentry>
+      <term>Binutils LTO Patch - <token>&binutils-lto-patch-size;</token>:</term>
+      <listitem>
+        <para>Download: <ulink url="&patches-root;&binutils-lto-patch;"/></para>
+        <para>MD5 sum: <literal>&binutils-lto-patch-md5;</literal></para>
+      </listitem>
+    </varlistentry>
+
     <varlistentry>
       <term>Bzip2 Documentation Patch - <token>&bzip2-docs-patch-size;</token>:</term>
       <listitem>

chapter05/gcc-pass2.xml

@@ -57,15 +57,15 @@
 
 <screen><userinput remap="pre">cat gcc/limitx.h gcc/glimits.h gcc/limity.h &gt; \
   `dirname $($LFS_TGT-gcc -print-libgcc-file-name)`/include-fixed/limits.h</userinput></screen>
-
+<!--
     <para>For x86 machines, the limited number of registers is a bottleneck
-    for the system.  Free one up by not using a fram pointer that is not
+    for the system.  Free one up by not using a frame pointer that is not
     needed:</para>
 
 <screen><userinput remap="pre">case `uname -m` in
   i?86) sed -i 's/^T_CFLAGS =$/&amp; -fomit-frame-pointer/' gcc/Makefile.in ;;
 esac</userinput></screen>
-
+-->
     <para>Once again, change the location of GCC's default dynamic linker to
     use the one installed in <filename
     class="directory">/tools</filename>.</para>

chapter06/binutils.xml

@@ -64,6 +64,11 @@ Ask your system administrator to create more.</computeroutput></screen>
 <screen><userinput remap="pre">rm -fv etc/standards.info
 sed -i.bak '/^INFO/s/standards.info //' etc/Makefile.in</userinput></screen>
 
+    <para>Add an upstream patch to use gcc's link time optimization (LTO) 
+    the default:</para>
+
+<screen><userinput remap="pre">patch -Np1 -i ../&binutils-lto-patch;</userinput></screen>
+
     <para>The Binutils documentation recommends building Binutils outside of the
     source directory in a dedicated build directory:</para>
 
@@ -114,15 +119,9 @@ cd ../binutils-build</userinput></screen>
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make tooldir=/usr install</userinput></screen>
-<!--
-    <para>Install the <filename class="headerfile">libiberty</filename> header
-    file that is needed by some packages:</para>
 
-<screen><userinput remap="install">cp -v ../binutils-&binutils-version;/include/libiberty.h /usr/include</userinput></screen>
--->
   </sect2>
 
-
   <sect2 id="contents-binutils" role="content">
     <title>Contents of Binutils</title>
 

chapter06/gcc.xml

@@ -45,7 +45,7 @@
     programs to fail:</para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../&gcc-upstream-patch;</userinput></screen>
-
+<!--
     <para>As in <xref linkend="ch-tools-gcc-pass2"/>, apply the following
     <command>sed</command> to force the build to use the
     <option>-fomit-frame-pointer</option> compiler flag in order to ensure
@@ -54,7 +54,7 @@
 <screen><userinput remap="pre">case `uname -m` in
   i?86) sed -i 's/^T_CFLAGS =$/&amp; -fomit-frame-pointer/' gcc/Makefile.in ;;
 esac</userinput></screen>
-
+-->
     <para>The GCC documentation recommends building GCC outside of the source
     directory in a dedicated build directory:</para>
 
@@ -150,6 +150,14 @@ cd ../gcc-build</userinput></screen>
 
 <screen><userinput remap="install">ln -sv gcc /usr/bin/cc</userinput></screen>
 
+    <para>Add a compatibility symlink to enable building programs with
+    Link Time Optimization (LTO):</para> 
+
+<screen><userinput remap="install">install -dm755 /usr/lib/bfd-plugins
+pushd /usr/lib/bfd-plugins
+ln -sfv ../../libexec/gcc/x86_64-unknown-linux-gnu/&gcc-version;/liblto_plugin.so 
+popd</userinput></screen>
+
     <para>Now that our final toolchain is in place, it is important to again ensure
     that compiling and linking will work as expected. We do this by performing
     the same sanity checks as we did earlier in the chapter:</para>

general.ent

@@ -1,6 +1,6 @@
-<!ENTITY version         "SVN-20140510">
+<!ENTITY version         "SVN-20140511">
 <!ENTITY short-version   "svn">  <!-- Used in dbus chapter, change to x.y for release -->
-<!ENTITY releasedate     "May 10, 2014">
+<!ENTITY releasedate     "May 11, 2014">
 <!ENTITY copyrightdate   "1999-2014"><!-- jhalfs needs a literal dash, not &ndash; -->
 <!ENTITY milestone       "8.0">
 <!ENTITY generic-version "development"> <!-- Use "development", "testing", or "x.y[-pre{x}]" -->

patches.ent

@@ -6,6 +6,10 @@
 <!ENTITY bash-fixes-patch-md5 "749b4b520708300b64f8166ba2b1b4a0">
 <!ENTITY bash-fixes-patch-size "14 KB">
 
+<!ENTITY binutils-lto-patch "binutils-&binutils-version;-load_gcc_lto_plugin_by_default-1.patch">
+<!ENTITY binutils-lto-patch-md5 "48e4e96a60bfed41804aaecf4944f5d9">
+<!ENTITY binutils-lto-patch-size "2.0 KB">
+
 <!ENTITY bc-memory-leak-patch "bc-&bc-version;-memory_leak-1.patch">
 <!ENTITY bc-memory-leak-patch-md5 "877e81fba316fe487ec23501059d54b8">
 <!ENTITY bc-memory-leak-patch-size "1.4 KB">