--- a/b2g/config/aries/releng-aries.tt
+++ b/b2g/config/aries/releng-aries.tt
@@ -2,16 +2,16 @@
 {
 "size": 135359412,
 "digest": "45e677c9606cc4eec44ef4761df47ff431df1ffad17a5c6d21ce700a1c47f79e87a4aa9f30ae47ff060bd64f5b775d995780d88211f9a759ffa0d076beb4816b",
 "algorithm": "sha512",
 "filename": "backup-aries.tar.xz",
 "comment": "v18D"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]

--- a/b2g/config/dolphin/releng-dolphin.tt
+++ b/b2g/config/dolphin/releng-dolphin.tt
@@ -1,10 +1,10 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]

--- a/b2g/config/emulator-ics/releng-emulator-ics.tt
+++ b/b2g/config/emulator-ics/releng-emulator-ics.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator-jb/releng-emulator-jb.tt
+++ b/b2g/config/emulator-jb/releng-emulator-jb.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator-kk/releng-emulator-kk.tt
+++ b/b2g/config/emulator-kk/releng-emulator-kk.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator-l/releng-emulator-l.tt
+++ b/b2g/config/emulator-l/releng-emulator-l.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator-x86-kk/releng-emulator-kk.tt
+++ b/b2g/config/emulator-x86-kk/releng-emulator-kk.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator-x86-l/releng-emulator-l.tt
+++ b/b2g/config/emulator-x86-l/releng-emulator-l.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/emulator/releng-emulator.tt
+++ b/b2g/config/emulator/releng-emulator.tt
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/b2g/config/flame-kk/releng-flame-kk.tt
+++ b/b2g/config/flame-kk/releng-flame-kk.tt
@@ -2,16 +2,16 @@
 {
 "size": 135359412,
 "digest": "45e677c9606cc4eec44ef4761df47ff431df1ffad17a5c6d21ce700a1c47f79e87a4aa9f30ae47ff060bd64f5b775d995780d88211f9a759ffa0d076beb4816b",
 "algorithm": "sha512",
 "filename": "backup-flame.tar.xz",
 "comment": "v18D"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]

--- a/b2g/config/flame/releng-flame.tt
+++ b/b2g/config/flame/releng-flame.tt
@@ -1,15 +1,15 @@
 [
 {"size": 149922032,
 "digest": "8d1a71552ffee561e93b5b3f1bb47866592ab958f908007c75561156430eb1b85a265bfc4dc2038e58dda0264daa9854877a84ef3b591c9ac2f1ab97c098e61e",
 "filename": "backup-flame.tar.xz",
 "algorithm": "sha512"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]

--- a/b2g/config/nexus-4-kk/releng-mako.tt
+++ b/b2g/config/nexus-4-kk/releng-mako.tt
@@ -13,17 +13,17 @@
 },
 {
 "size": 163277,
 "digest": "e58aad76e6395a1a82fe886783842c4676c12d065e2f65bce6ce19cab2488be767aaea27fa2f46f48a0bf8d9714a6b453b474d2f9df5de158c49e6cbde0a359e",
 "algorithm": "sha512",
 "filename": "lge-mako-kot49h-f59c98be.tgz"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]
 

--- a/b2g/config/nexus-4/releng-mako.tt
+++ b/b2g/config/nexus-4/releng-mako.tt
@@ -13,17 +13,17 @@
 },
 {
 "size": 378532,
 "digest": "27aced8feb0e757d61df37839e62410ff30a059cfa8f04897d29ab74b787c765313acf904b1f9cf311c3e682883514df7da54197665251ef9b8bdad6bd0f62c5",
 "algorithm": "sha512",
 "filename": "lge-mako-jwr66v-985845e4.tgz"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }
 ]
 

--- a/b2g/config/nexus-5-l/releng-nexus5.tt
+++ b/b2g/config/nexus-5-l/releng-nexus5.tt
@@ -1,8 +1,8 @@
 [{
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": "True"
 }]

--- a/b2g/config/tooltool-manifests/linux32/releng.manifest
+++ b/b2g/config/tooltool-manifests/linux32/releng.manifest
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 11189216,
 "digest": "18bc52b0599b1308b667e282abb45f47597bfc98a5140cfcab8da71dacf89dd76d0dee22a04ce26fe7ad1f04e2d6596991f9e5b01fd2aaaab5542965f596b0e6",
 "algorithm": "sha512",

--- a/browser/config/tooltool-manifests/linux32/releng.manifest
+++ b/browser/config/tooltool-manifests/linux32/releng.manifest
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512", 
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 11189216,
 "digest": "18bc52b0599b1308b667e282abb45f47597bfc98a5140cfcab8da71dacf89dd76d0dee22a04ce26fe7ad1f04e2d6596991f9e5b01fd2aaaab5542965f596b0e6",
 "algorithm": "sha512",

--- a/browser/config/tooltool-manifests/linux64/releng.manifest
+++ b/browser/config/tooltool-manifests/linux64/releng.manifest
@@ -1,13 +1,13 @@
 [
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512", 
 "filename": "gcc.tar.xz",
 "unpack": true
 },
 {
 "size": 12072532,
 "digest": "3915f8ec396c56a8a92e6f9695b70f09ce9d1582359d1258e37e3fd43a143bc974410e4cfc27f500e095f34a8956206e0ebf799b7287f0f38def0d5e34ed71c9",
 "algorithm": "sha512",

--- a/build/autoconf/toolchain.m4
+++ b/build/autoconf/toolchain.m4
@@ -102,19 +102,19 @@ if test "$GNU_CC"; then
         GCC_USE_GNU_LD=1
     fi
 fi
 
 AC_SUBST(CLANG_CXX)
 AC_SUBST(CLANG_CL)
 
 if test -n "$GNU_CC" -a -z "$CLANG_CC" ; then
-    if test "$GCC_MAJOR_VERSION" -eq 4 -a "$GCC_MINOR_VERSION" -lt 7 ||
+    if test "$GCC_MAJOR_VERSION" -eq 4 -a "$GCC_MINOR_VERSION" -lt 8 ||
        test "$GCC_MAJOR_VERSION" -lt 4; then
-        AC_MSG_ERROR([Only GCC 4.7 or newer supported])
+        AC_MSG_ERROR([Only GCC 4.8 or newer supported])
     fi
 fi
 ])
 
 AC_DEFUN([MOZ_CROSS_COMPILER],
 [
 echo "cross compiling from $host to $target"
 
@@ -293,19 +293,19 @@ EOF
             changequote(<<,>>)
             HOST_GCC_VERSION_FULL="$HOST_CXX_VERSION"
             HOST_GCC_VERSION=`echo "$HOST_GCC_VERSION_FULL" | $PERL -pe '(split(/\./))[0]>=4&&s/(^\d*\.\d*).*/<<$>>1/;'`
 
             HOST_GCC_MAJOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>1 }'`
             HOST_GCC_MINOR_VERSION=`echo ${HOST_GCC_VERSION} | $AWK -F\. '{ print <<$>>2 }'`
             changequote([,])
 
-            if test "$HOST_GCC_MAJOR_VERSION" -eq 4 -a "$HOST_GCC_MINOR_VERSION" -lt 7 ||
+            if test "$HOST_GCC_MAJOR_VERSION" -eq 4 -a "$HOST_GCC_MINOR_VERSION" -lt 8 ||
                test "$HOST_GCC_MAJOR_VERSION" -lt 4; then
-                AC_MSG_ERROR([Only GCC 4.7 or newer supported for host compiler])
+                AC_MSG_ERROR([Only GCC 4.8 or newer supported for host compiler])
             fi
         fi
 
         HOST_CXXFLAGS="$HOST_CXXFLAGS -std=gnu++0x"
 
         _SAVE_CXXFLAGS="$CXXFLAGS"
         _SAVE_CPPFLAGS="$CPPFLAGS"
         _SAVE_CXX="$CXX"

--- a/build/unix/build-gcc/build-gcc.sh
+++ b/build/unix/build-gcc/build-gcc.sh
@@ -1,15 +1,13 @@
 #!/bin/bash
 
-gcc_version=4.7.3
-binutils_version=2.23.1
+gcc_version=4.8.5
+binutils_version=2.25.1
 this_path=$(readlink -f $(dirname $0))
-gcc_bt_patch=${this_path}/gcc-bt.patch
-gcc_pr55650_patch=${this_path}/gcc48-pr55650.patch
 make_flags='-j12'
 
 root_dir="$1"
 if [ -z "$root_dir" -o ! -d "$root_dir" ]; then
   root_dir=$(mktemp -d)
 fi
 cd $root_dir
 
@@ -36,21 +34,16 @@ case "$gcc_version" in
   wget -c -P $TMPDIR ftp://ftp.gnu.org/gnu/gcc/gcc-$gcc_version/gcc-$gcc_version.tar.bz2 || exit 1
   ;;
 esac
 tar xjf $TMPDIR/gcc-$gcc_version.tar.bz2
 cd gcc-$gcc_version
 
 ./contrib/download_prerequisites
 
-# gcc 4.7 doesn't dump a stack on ICE so hack that in
-patch -p1 < $gcc_bt_patch || exit 1
-
-patch -p0 < $gcc_pr55650_patch || exit 1
-
 cd ..
 mkdir gcc-objdir
 cd gcc-objdir
 ../gcc-$gcc_version/configure --prefix=/tools/gcc --enable-languages=c,c++  --disable-nls --disable-gnu-unique-object --enable-__cxa_atexit --with-arch-32=pentiumpro || exit 1
 make $make_flags || exit 1
 make $make_flags install DESTDIR=$root_dir || exit 1
 
 cd $root_dir/tools

deleted file mode 100644
--- a/build/unix/build-gcc/gcc-bt.patch
+++ /dev/null
@@ -1,25 +0,0 @@
---- gcc-4.7.3/gcc/diagnostic.c	2012-02-02 15:46:06.000000000 -0500
-+++ gcc-patched/gcc/diagnostic.c	2013-05-23 14:07:10.756527912 -0400
-@@ -31,6 +31,10 @@
- #include "intl.h"
- #include "diagnostic.h"
- 
-+#include <execinfo.h>
-+#include <unistd.h>
-+#include <fcntl.h>
-+#include <stdio.h>
- #define pedantic_warning_kind(DC)			\
-   ((DC)->pedantic_errors ? DK_ERROR : DK_WARNING)
- #define permissive_error_kind(DC) ((DC)->permissive ? DK_WARNING : DK_ERROR)
-@@ -237,6 +241,11 @@
-       if (context->abort_on_error)
- 	real_abort ();
- 
-+      {
-+        void *stack[100];
-+        int count = backtrace(stack, 100);
-+        backtrace_symbols_fd(stack, count, STDERR_FILENO);
-+      }
-       fnotice (stderr, "Please submit a full bug report,\n"
- 	       "with preprocessed source if appropriate.\n"
- 	       "See %s for instructions.\n", bug_report_url);

deleted file mode 100644
--- a/build/unix/build-gcc/gcc48-pr55650.patch
+++ /dev/null
@@ -1,52 +0,0 @@
-2012-12-12  Jakub Jelinek  <jakub@redhat.com>
-
-	PR gcov-profile/55650
-	* coverage.c (coverage_obj_init): Return false if no functions
-	are being emitted.
-
-	* g++.dg/other/pr55650.C: New test.
-	* g++.dg/other/pr55650.cc: New file.
-
---- gcc/coverage.c.jj	2012-11-19 14:41:24.000000000 +0100
-+++ gcc/coverage.c	2012-12-12 08:54:35.005180211 +0100
-@@ -999,6 +999,9 @@ coverage_obj_init (void)
-       /* The function is not being emitted, remove from list.  */
-       *fn_prev = fn->next;
- 
-+  if (functions_head == NULL)
-+    return false;
-+
-   for (ix = 0; ix != GCOV_COUNTERS; ix++)
-     if ((1u << ix) & prg_ctr_mask)
-       n_counters++;
---- gcc/testsuite/g++.dg/other/pr55650.C.jj	2012-12-12 09:03:53.342876593 +0100
-+++ gcc/testsuite/g++.dg/other/pr55650.C	2012-12-12 09:03:11.000000000 +0100
-@@ -0,0 +1,21 @@
-+// PR gcov-profile/55650
-+// { dg-do link }
-+// { dg-options "-O2 -fprofile-generate" }
-+// { dg-additional-sources "pr55650.cc" }
-+
-+struct A
-+{
-+  virtual void foo ();
-+};
-+
-+struct B : public A
-+{
-+  B ();
-+  void foo () {}
-+};
-+
-+inline A *
-+bar ()
-+{
-+  return new B;
-+}
---- gcc/testsuite/g++.dg/other/pr55650.cc.jj	2012-12-12 09:03:56.329858741 +0100
-+++ gcc/testsuite/g++.dg/other/pr55650.cc	2012-12-12 09:03:48.982900718 +0100
-@@ -0,0 +1,4 @@
-+int
-+main ()
-+{
-+}

--- a/mobile/android/config/tooltool-manifests/android-armv6/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/android-armv6/releng.manifest
@@ -32,16 +32,16 @@
 {
 "size": 4906080,
 "digest": "d735544e039da89382c53b2302b7408d4610247b4f8b5cdc5a4d5a8ec5470947b19e8ea7f7a37e78222e661347e394e0030d81f41534138b527b14e9c4e55634",
 "algorithm": "sha512",
 "filename": "jsshell.tar.xz",
 "unpack": true
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 }
 ]

--- a/mobile/android/config/tooltool-manifests/android-x86/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/android-x86/releng.manifest
@@ -33,16 +33,16 @@
 {
 "size": 4906080,
 "digest": "d735544e039da89382c53b2302b7408d4610247b4f8b5cdc5a4d5a8ec5470947b19e8ea7f7a37e78222e661347e394e0030d81f41534138b527b14e9c4e55634",
 "algorithm": "sha512",
 "filename": "jsshell.tar.xz",
 "unpack": true
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"version": "gcc 4.8.5",
+"size": 81065660,
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz",
 "unpack": true
 }
 ]

--- a/mobile/android/config/tooltool-manifests/android/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/android/releng.manifest
@@ -35,21 +35,21 @@
 "size": 4906080,
 "visibility": "public",
 "unpack": true,
 "digest": "d735544e039da89382c53b2302b7408d4610247b4f8b5cdc5a4d5a8ec5470947b19e8ea7f7a37e78222e661347e394e0030d81f41534138b527b14e9c4e55634",
 "algorithm": "sha512",
 "filename": "jsshell.tar.xz"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
+"version": "gcc 4.8.5",
+"size": 81065660,
 "visibility": "public",
 "unpack": true,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz"
 },
 {
 "size": 30899096,
 "visibility": "public",
 "digest": "ac9f5f95d11580d3dbeff87e80a585fe4d324b270dabb91b1165686acab47d99fa6651074ab0be09420239a5d6af38bb2c539506962a7b44e0ed4d080bba2953",
 "algorithm": "sha512",

--- a/mobile/android/config/tooltool-manifests/b2gdroid/releng.manifest
+++ b/mobile/android/config/tooltool-manifests/b2gdroid/releng.manifest
@@ -35,21 +35,21 @@
 "size": 4906080,
 "visibility": "public",
 "unpack": true,
 "digest": "d735544e039da89382c53b2302b7408d4610247b4f8b5cdc5a4d5a8ec5470947b19e8ea7f7a37e78222e661347e394e0030d81f41534138b527b14e9c4e55634",
 "algorithm": "sha512",
 "filename": "jsshell.tar.xz"
 },
 {
-"version": "gcc 4.7.3",
-"size": 80458572,
+"version": "gcc 4.8.5",
+"size": 81065660,
 "visibility": "public",
 "unpack": true,
-"digest": "e5101f9dee1e462f6cbd3897ea57eede41d23981825c7b20d91d23ab461875d54d3dfc24999aa58a31e8b01f49fb3140e05ffe5af2957ef1d1afb89fd0dfe1ad",
+"digest": "db26f498ab56a3b5c65d7cda290cbb74174af9f2d021ca9c158f53b0382924ccf5ed9638d41eef449434aa9383a9113994d9729d9dd910321d1f35f9411eae38",
 "algorithm": "sha512",
 "filename": "gcc.tar.xz"
 },
 {
 "size": 30899096,
 "visibility": "public",
 "digest": "ac9f5f95d11580d3dbeff87e80a585fe4d324b270dabb91b1165686acab47d99fa6651074ab0be09420239a5d6af38bb2c539506962a7b44e0ed4d080bba2953",
 "algorithm": "sha512",