diff --git a/environments/arm-linux/default_toolchain_file.cmake b/environments/arm-linux/default_toolchain_file.cmake
index d530b0d..7ac1621 100644
--- a/environments/arm-linux/default_toolchain_file.cmake
+++ b/environments/arm-linux/default_toolchain_file.cmake
@@ -16,3 +16,4 @@
 set(CMAKE_CXX_FLAGS_INIT "-fdiagnostics-show-option -gdwarf-2 -mstrict-align -O0 -DARM64=1")
 
 include($ENV{TS_ROOT}/tools/cmake/compiler/GCC.cmake REQUIRED)
+include($ENV{TS_ROOT}/tools/cmake/compiler/config_iface.cmake REQUIRED)
diff --git a/environments/linux-pc/default_toolchain_file.cmake b/environments/linux-pc/default_toolchain_file.cmake
index 93e716f..6978dbf 100644
--- a/environments/linux-pc/default_toolchain_file.cmake
+++ b/environments/linux-pc/default_toolchain_file.cmake
@@ -1,8 +1,8 @@
 #-------------------------------------------------------------------------------
-# Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2020-2021, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
 #-------------------------------------------------------------------------------
 
-# Empty.
+include($ENV{TS_ROOT}/tools/cmake/compiler/config_iface.cmake REQUIRED)
diff --git a/environments/opteesp/default_toolchain_file.cmake b/environments/opteesp/default_toolchain_file.cmake
index c73345f..34ca0c9 100644
--- a/environments/opteesp/default_toolchain_file.cmake
+++ b/environments/opteesp/default_toolchain_file.cmake
@@ -20,7 +20,7 @@
 #set(CMAKE_EXE_LINKER_FLAGS_INIT --specs=nosys.specs)
 
 include($ENV{TS_ROOT}/tools/cmake/compiler/GCC.cmake REQUIRED)
-
+include($ENV{TS_ROOT}/tools/cmake/compiler/config_iface.cmake REQUIRED)
 # Set mandatory compiler and linker flags for this environment:
 #   - This environment uses a libc implementation from SPDEV-KIT. Disable standard
 #     include search paths, startup files and default libraries.