diff --git a/configs/playgo_defconfig b/configs/playgo_defconfig
index 99da85941..8ce757a1b 100644
--- a/configs/playgo_defconfig
+++ b/configs/playgo_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/playgov2_defconfig b/configs/playgov2_defconfig
index 527ba53da..555148894 100644
--- a/configs/playgov2_defconfig
+++ b/configs/playgov2_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/pocketgo2_defconfig b/configs/pocketgo2_defconfig
index 7f6f76dbc..c831ab4ca 100644
--- a/configs/pocketgo2_defconfig
+++ b/configs/pocketgo2_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/pocketgo2v2_defconfig b/configs/pocketgo2v2_defconfig
index 502c656c1..4a56c582c 100644
--- a/configs/pocketgo2v2_defconfig
+++ b/configs/pocketgo2v2_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg280m_defconfig b/configs/rg280m_defconfig
index c91c232d3..956555183 100644
--- a/configs/rg280m_defconfig
+++ b/configs/rg280m_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg280v_defconfig b/configs/rg280v_defconfig
index 04047fed1..1d5965377 100644
--- a/configs/rg280v_defconfig
+++ b/configs/rg280v_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg300x_defconfig b/configs/rg300x_defconfig
index 252093930..f32b28b7c 100644
--- a/configs/rg300x_defconfig
+++ b/configs/rg300x_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg350_defconfig b/configs/rg350_defconfig
index aca6b9fc3..486ba05af 100644
--- a/configs/rg350_defconfig
+++ b/configs/rg350_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg350m_defconfig b/configs/rg350m_defconfig
index 34402ba7d..9cae64813 100644
--- a/configs/rg350m_defconfig
+++ b/configs/rg350m_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y
diff --git a/configs/rg350p_defconfig b/configs/rg350p_defconfig
index 7dd4a8c6c..728cbcc1b 100644
--- a/configs/rg350p_defconfig
+++ b/configs/rg350p_defconfig
@@ -11,6 +11,9 @@ BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
 BR2_PTHREAD_DEBUG=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-lto"
 BR2_GCC_VERSION_4_9_X=y
+# BR2_GCC_VERSION_5_4_X=y
+# BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE=y
+# BR2_GCC_VERSION="5.4.0"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-lto"
 BR2_TOOLCHAIN_BUILDROOT_CXX=y
 BR2_GCC_ENABLE_GRAPHITE=y