Fix SDL2 compilation on i686

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@22327 af4574ff-66df-0310-9fd7-8a98e5e911e0

introduction/welcome/changelog.xml

@@ -42,8 +42,13 @@
     </listitem>
        -->
     <listitem>
-      <para>October 28th, 2019</para>
+      <para>October 29th, 2019</para>
       <itemizedlist>
+        <listitem>
+          <para>[renodr] - Fix the build of SDL2 on i686 systems. Fixes
+          <ulink url="&blfs-ticket-root;12633">#12633</ulink>.
+          Thanks goes to tnut for reporting.</para>
+        </listitem>
         <listitem>
           <para>[bdubbs] - Update to libchamplain-0.12.20. Fixes
           <ulink url="&blfs-ticket-root;12706">#12706</ulink>.</para>
@@ -74,6 +79,7 @@
         </listitem>
       </itemizedlist>
     </listitem>
+
     <listitem>
       <para>October 28th, 2019</para>
       <itemizedlist>

multimedia/libdriv/sdl2.xml

@@ -58,6 +58,16 @@
       </listitem>
     </itemizedlist>
 
+    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
+    <itemizedlist spacing="compact">
+      <listitem>
+        <para>
+          Required patch (for i686 systems):
+           <ulink url="&patch-root;/SDL2-&sdl2-version;-opengl_include_fix-1.patch"/>
+        </para>
+      </listitem>
+    </itemizedlist>
+
     <bridgehead renderas="sect3">SDL2 Dependencies</bridgehead>
 
     <bridgehead renderas="sect4">Optional</bridgehead>
@@ -80,6 +90,13 @@
   <sect2 role="installation">
     <title>Installation of SDL2</title>
 
+    <para>First, if you are building on a 32-bit i686 system, apply a patch
+    containing a fix for the OpenGL headers and their data types:</para>
+
+<screen><userinput remap="pre">case $(uname -m) in
+   i?86) patch -Np1 -i ../SDL2-&sdl2-version;-opengl_include_fix-1.patch ;;
+esac</userinput></screen>
+
     <para>Install <application>SDL2</application> by running the
     following commands:</para>