Fix compilation of Firefox on i686

git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@21978 af4574ff-66df-0310-9fd7-8a98e5e911e0

introduction/welcome/changelog.xml

@@ -44,6 +44,10 @@
     <listitem>
       <para>August 16th, 2019</para>
       <itemizedlist>
+        <listitem>
+          <para>[renodr] - Fix compilation of Firefox on i686 platforms. Fixes
+          <ulink url="&blfs-ticket-root;12286">#12286</ulink>.</para>
+        </listitem>
         <listitem>
           <para>[timtas] - Update to qemu-4.1.0. Fixes
           <ulink url="&blfs-ticket-root;12404">#12404</ulink>.</para>

xsoft/graphweb/firefox.xml

@@ -269,7 +269,8 @@ ac_add_options --enable-official-branding
 #ac_add_options --disable-install-strip
 
 # Disabling debug symbols makes the build much smaller and a little
-# faster. Comment this if you need to run a debugger.
+# faster. Comment this if you need to run a debugger. Note: This is
+# required for compilation on i686.
 ac_add_options --disable-debug-symbols
 
 # The BLFS editors recommend not changing anything below this line:
@@ -365,12 +366,14 @@ echo "d2284a20-0505-4927-a809-7ffaf4d91e55" > mozilla-key</userinput></screen>
 
 <screen role="nodump"><userinput>sed -e 's/checkImpl/checkFFImpl/g' -i js/src/vm/JSContext*.h</userinput></screen>
 
-<!--<para>
-      Apply a sed to work around a change in the linux headers, and then
-      invoke the Python2 script to compile the package.
+    <para>
+      If you are building on i686, apply a fix to prevent Internal Compiler
+      Errors in GCC-7+:
     </para>
 
-<screen><userinput>sed -i 's/SIOCGSTAMP/0x8906/' media/webrtc/trunk/webrtc/rtc_base/physicalsocketserver.cc &amp;&amp;-->
+<screen><userinput remap="pre">case $(uname -m) in
+   i?86) sed -i "562 s/mips64/i386/" gfx/skia/skia/third_party/skcms/src/Transform_inl.h ;;
+esac</userinput></screen>
 
     <para>
       Now invoke the Python2 script to compile the package.