Changeset 672f2a5

Timestamp:

02/26/2022 08:31:27 AM (15 months ago)

Author:

Xi Ruoyao <xry111@…>

Branches:

11.1, 11.2, 11.3, ken/inkscape-core-mods, lazarus, plabs/python-mods, qt5new, trunk, xry111/intltool, xry111/soup3, xry111/test-20220226

Children:

43397b0e

Parents:

552bf36

git-author:

Xi Ruoyao <xry111@…> (02/26/2022 08:26:38 AM)

git-committer:

Xi Ruoyao <xry111@…> (02/26/2022 08:31:27 AM)

Message:

grub-efi: allows building on 32-bit LFS for x86_64 EFI

File:

• postlfs/filesystems/uefi-bootloaders/grub-efi.xml (modified) (6 diffs)

postlfs/filesystems/uefi-bootloaders/grub-efi.xml

@@ -10 +10 @@
   <!ENTITY grub-efi-size          "6.3 MB">
   <!ENTITY grub-efi-buildsize     "137 MB">
-  <!ENTITY grub-efi-time          "1.0 SBU">
+  <!ENTITY grub-efi-time          "1.0 SBU (on 64-bit LFS)">
 
   <!ENTITY unifont-download-http  "https://unifoundry.com/pub/unifont/unifont-&unifont-version;/font-builds/unifont-&unifont-version;.pcf.gz">
   <!ENTITY unifont-md5sum         "8191ca4fce0eb6073d47c7573e6babc1">
   <!ENTITY unifont-size           "1.3 MB">
+
+  <!ENTITY gcc-download-http      "&gnu-http;/gcc/gcc-&gcc-version;/gcc-&gcc-version;.tar.xz">
+  <!ENTITY gcc-md5sum             "31c86f2ced76acac66992eeedce2fce2">
+  <!ENTITY gcc-size               "77 MB">
 ]>
 
@@ -96 +100 @@
     </itemizedlist>
 
+    <itemizedlist spacing="compact">
+      <title>GCC (only needed if building on 32-bit LFS)</title>
+      <listitem>
+        <para>
+          Download (HTTP): <ulink url="&gcc-download-http;"/>
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          Download MD5 sum: &gcc-md5sum;
+        </para>
+      </listitem>
+      <listitem>
+        <para>
+          Download size: &gcc-size;
+        </para>
+      </listitem>
+    </itemizedlist>
+
     <bridgehead renderas="sect3">GRUB Dependencies</bridgehead>
 
@@ -120 +143 @@
   <sect2 role="installation">
     <title>Installation of GRUB</title>
-
-    <warning>
-      <para>
-        The instruction does not work correctly on 32-bit LFS system
-        at now.
-      </para>
-    </warning>
 
     <para>
@@ -147 +163 @@
     </warning>
 
+    <para>If you are running a 32-bit LFS, prepare a 64-bit compiler:</para>
+
+<!-- 'literal' is used deliberately to show this is only for 32-bit LFS -->
+<screen><userinput>case $(uname -m) in i?86 )
+    <literal>tar xf ../gcc-11.2.0.tar.xz
+    mkdir gcc-11.2.0/build
+    pushd gcc-11.2.0/build
+        ../configure --prefix=$PWD/../../x86_64-gcc \
+                     --target=x86_64-linux-gnu      \
+                     --with-system-zlib             \
+                     --enable-languages=c,c++       \
+                     --with-ld=/usr/bin/ld
+        make all-gcc
+        make install-gcc
+    popd
+    export TARGET_CC=$PWD/x86_64-gcc/bin/x86_64-linux-gnu-gcc</literal>
+esac</userinput></screen>
+
     <para>
       Build <application>GRUB</application> with the following commands:
@@ -156 +190 @@
             --enable-grub-mkfont \
             --with-platform=efi  \
+            --target=x86_64      \
             --disable-werror     &amp;&amp;
+unset TARGET_CC &amp;&amp;
 make</userinput></screen>
 
@@ -200 +236 @@
 
     <para>
-      <option>--target=i386</option>: Some x86_64 systems have 32-bit UEFI
-      implementation, but they are very old and rare.
-      Do <emphasis role='bold'>not</emphasis> use this option unless you are
-      absolutely sure that LFS is running on such a system.
+      <parameter>--target=x86_64</parameter>: Ensures building GRUB for
+      x86_64 even if building on a 32-bit LFS system.  Most EFI firmwares
+      on x86_64 does not support 32-bit bootloaders.
+    </para>
+
+    <para>
+      <option>--target=i386</option>: A few 32-bit x86 platforms have EFI
+      support.  And, some x86_64 platforms have a 32-bit EFI implementation,
+      but they are very old and rare. Use this instead of
+      <parameter>--target=x86_64</parameter> if you are
+      <emphasis role='bold'>absolutely sure</emphasis> that LFS is running
+      on such a system.
     </para>