diff -ruN rpmbuild.old/SOURCES/arm-simd-neon-fix.patch rpmbuild/SOURCES/arm-simd-neon-fix.patch
--- rpmbuild.old/SOURCES/arm-simd-neon-fix.patch	1970-01-01 01:00:00.000000000 +0100
+++ rpmbuild/SOURCES/arm-simd-neon-fix.patch	2014-02-04 07:21:58.000000000 +0000
@@ -0,0 +1,49 @@
+--- thunderbird-24.2.0/comm-esr24/mozilla/configure.orig	2014-02-03 14:38:09.040069634 +0000
++++ thunderbird-24.2.0/comm-esr24/mozilla/configure	2014-02-03 15:58:24.105071930 +0000
+@@ -6673,9 +6673,8 @@
+     fi
+ fi
+ 
+-
+-
+ if test "$CPU_ARCH" = "arm"; then
++if test "$MOZ_ARCH" = "armv7-a"; then
+   echo $ac_n "checking for ARM SIMD support in compiler""... $ac_c" 1>&6
+ echo "configure:6681: checking for ARM SIMD support in compiler" >&5
+   # We try to link so that this also fails when
+@@ -6758,7 +6757,11 @@
+   fi
+ 
+ fi # CPU_ARCH = arm
+-
++else
++HAVE_ARM_NEON=0
++BUILD_ARM_NEON=0
++HAVE_ARM_SIMD=0
++fi
+ 
+ 
+ 
+--- thunderbird-24.2.0/comm-esr24/mozilla/js/src/configure.orig	2014-02-03 16:47:37.890073338 +0000
++++ thunderbird-24.2.0/comm-esr24/mozilla/js/src/configure	2014-02-03 16:49:23.735073388 +0000
+@@ -5901,6 +5901,7 @@
+ 
+ 
+ if test "$CPU_ARCH" = "arm"; then
++if test "$MOZ_ARCH" = "armv7-a"; then
+   echo $ac_n "checking for ARM SIMD support in compiler""... $ac_c" 1>&6
+ echo "configure:5906: checking for ARM SIMD support in compiler" >&5
+   # We try to link so that this also fails when
+@@ -5983,7 +5984,11 @@
+   fi
+ 
+ fi # CPU_ARCH = arm
+-
++else
++HAVE_ARM_NEON=0
++BUILD_ARM_NEON=0
++HAVE_ARM_SIMD=0
++fi
+ 
+ 
+ 
diff -ruN rpmbuild.old/SPECS/thunderbird.spec rpmbuild/SPECS/thunderbird.spec
--- rpmbuild.old/SPECS/thunderbird.spec	2013-12-06 19:53:57.000000000 +0000
+++ rpmbuild/SPECS/thunderbird.spec	2014-02-04 14:09:28.059496000 +0000
@@ -41,7 +41,7 @@
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
 Version:        24.2.0
-Release:        1%{?pre_version}%{?dist}
+Release:        1%{?pre_version}%{?dist}.0
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -79,6 +79,8 @@
 # Thunderbird specific
 Patch300:       thunderbird-8.0-enable-addons.patch
 
+Patch10001:     arm-simd-neon-fix.patch
+
 # Upstream patches
 
 %if %{official_branding}
@@ -165,6 +167,10 @@
 # thunderbird specific patches
 %patch300 -p1 -b .addons
 
+%ifarch %{arm}
+%patch10001 -p2 -b .arm
+%endif
+
 %if %{official_branding}
 # Required by Mozilla Corporation
 
@@ -211,7 +217,7 @@
 echo "ac_add_options --disable-ogg" >> .mozconfig
 
 # s390(x) and ppc(64) fail to start with jemalloc enabled
-%ifarch s390 s390x ppc ppc64
+%ifarch s390 s390x ppc ppc64 %{arm}
 echo "ac_add_options --disable-jemalloc" >> .mozconfig
 %endif
 
@@ -226,6 +232,11 @@
 echo "ac_add_options --disable-debug" >> .mozconfig
 echo "ac_add_options --enable-optimize" >> .mozconfig
 %endif
+
+%ifarch %{arm}
+echo "ac_add_options --with-arch=armv5te" >> .mozconfig
+echo "ac_add_options --target=armv5tel-redhat-linux-gnueabi" >> .mozconfig
+%endif
 #---------------------------------------------------------------------
 
 %build