diff --git a/arch/arm/src/common/Toolchain.defs b/arch/arm/src/common/Toolchain.defs
index 8c71515b9aa..e8dee552351 100644
--- a/arch/arm/src/common/Toolchain.defs
+++ b/arch/arm/src/common/Toolchain.defs
@@ -78,11 +78,17 @@ endif
 
 ifeq ($(CONFIG_LTO_THIN),y)
   ARCHOPTIMIZATION += -flto=thin
+  ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),y)
+    LDFLAGS += --lto
+  endif
 else ifeq ($(CONFIG_LTO_FULL),y)
   ARCHOPTIMIZATION += -flto
   ifeq ($(CONFIG_ARM_TOOLCHAIN_GNU_EABI),y)
     ARCHOPTIMIZATION += -fuse-linker-plugin
   endif
+  ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),y)
+    LDFLAGS += --lto
+  endif
 endif
 
 # NuttX buildroot under Linux or Cygwin
@@ -220,9 +226,10 @@ ifneq ($(CONFIG_CXX_RTTI),y)
 endif
 
 ARCHOPTIMIZATION += -fno-common -Wall -Wshadow -Wundef
-ARCHOPTIMIZATION += -nostdlib
 
-ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),)
+ifeq ($(CONFIG_ARM_TOOLCHAIN_ARMCLANG),y)
+  ARCHOPTIMIZATION += -nostdlib
+else
   LDFLAGS += -nostdlib
 endif
 
diff --git a/boards/arm/imx6/sabre-6quad/scripts/dramboot.sct b/boards/arm/imx6/sabre-6quad/scripts/dramboot.sct
index c93ab492bc7..2c4509fa8e8 100644
--- a/boards/arm/imx6/sabre-6quad/scripts/dramboot.sct
+++ b/boards/arm/imx6/sabre-6quad/scripts/dramboot.sct
@@ -101,7 +101,7 @@ OSCRAM_SECTIONS DDR3_START DDR3_SIZE
       CONSTRUCTORS
     }
 
-  bss AlignExpr(ImageLimit(data), 0x8)
+  bss AlignExpr(ImageLimit(data), 0x10)
     {
       *(.bss)
       *(.bss.*)