Changeset 07312f6 for chapter05/gcc-pass2.xml

Timestamp:

05/17/2009 03:20:56 AM (15 years ago)

Author:

Bruce Dubbs <bdubbs@…>

Branches:

10.0, 10.0-rc1, 10.1, 10.1-rc1, 11.0, 11.0-rc1, 11.0-rc2, 11.0-rc3, 11.1, 11.1-rc1, 11.2, 11.2-rc1, 11.3, 11.3-rc1, 12.0, 12.0-rc1, 12.1, 12.1-rc1, 6.5, 6.6, 6.7, 6.8, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.5-systemd, 7.6, 7.6-systemd, 7.7, 7.7-systemd, 7.8, 7.8-systemd, 7.9, 7.9-systemd, 8.0, 8.1, 8.2, 8.3, 8.4, 9.0, 9.1, arm, bdubbs/gcc13, ml-11.0, multilib, renodr/libudev-from-systemd, s6-init, trunk, xry111/arm64, xry111/arm64-12.0, xry111/clfs-ng, xry111/lfs-next, xry111/loongarch, xry111/loongarch-12.0, xry111/loongarch-12.1, xry111/mips64el, xry111/pip3, xry111/rust-wip-20221008, xry111/update-glibc

Children:

f270573

Parents:

fddfb52

Message:

Correct bootstrap explanation in gcc sections. Thanks to Chris Staub.

git-svn-id: ​http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8883 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

File:

• chapter05/gcc-pass2.xml (modified) (2 diffs)

chapter05/gcc-pass2.xml

@@ -67 +67 @@
 sed 's@\./fixinc\.sh@-c true@' gcc/Makefile.in.orig &gt; gcc/Makefile.in</userinput></screen>
 
-    <para>Non-bootstrap builds omit the <option>-fomit-frame-pointer</option>
-    build flag by default, and the goal should be to produce a compiler that is
-    exactly the same as if it were bootstrapped. Apply the following
-    <command>sed</command> command to force the build to use the flag:</para>
+    <para>For x86 machines, a bootstrap build of GCC uses the
+    <option>-fomit-frame-pointer</option> compiler flag.  Non-bootstrap builds
+    omit this flag by default, and the goal should be to produce a compiler
+    that is exactly the same as if it were bootstrapped.  Apply the following
+    <command>sed</command> command to force the build to use the flag:</para> 
 
 <screen><userinput remap="pre">cp -v gcc/Makefile.in{,.tmp}
@@ -210 +211 @@
         <term><parameter>--disable-bootstrap</parameter></term>
         <listitem>
-          <para>Bootstrapping the compiler is now the default for GCC. However,
-          our build method should provide us with a solid compiler without the
-          need to bootstrap each time.</para>
+          <para>For native builds of GCC, the default is to a "bootstrap" build.
+          This does not just compile GCC, but compiles it several times. It
+          uses the programs compiled in a first round to compile itself a
+          second time, and then again a third time.  The second and third
+          iterations are compared to make sure it can reproduce itself
+          flawlessly. This also implies that it was compiled correctly.
+          However, the LFS build method should provide a solid compiler
+          without the need to bootstrap each time.</para> 
         </listitem>
       </varlistentry>