diff --git a/modules/hal_nxp/mcux/mcux-sdk-ng/basic.cmake b/modules/hal_nxp/mcux/mcux-sdk-ng/basic.cmake
index 806a49488bb..9a3f07ec0f2 100644
--- a/modules/hal_nxp/mcux/mcux-sdk-ng/basic.cmake
+++ b/modules/hal_nxp/mcux/mcux-sdk-ng/basic.cmake
@@ -20,3 +20,21 @@ function(set_variable_ifdef feature_toggle variable)
     set(${variable} ON PARENT_SCOPE)
   endif()
 endfunction()
+
+# mcux sdk ng cmake functions `mcux_add_xxx` support add content based on
+# toolchains, like
+#
+#    mcux_add_library(
+#        LIBS ../iar/iar_lib_fro_calib_cm33_core0.a
+#        TOOLCHAINS iar
+#    )
+#
+# CMake should set current toolchain in CMake Variable
+# `CONFIG_TOOLCHAIN` to use this feature.
+if (${COMPILER} STREQUAL iar)
+  set(CONFIG_TOOLCHAIN iar)
+elseif (${COMPILER} STREQUAL xcc)
+  set(CONFIG_TOOLCHAIN xtensa)
+else ()
+  set(CONFIG_TOOLCHAIN armgcc)
+endif()
diff --git a/scripts/ci/check_compliance.py b/scripts/ci/check_compliance.py
index f07fbb1b95f..b622ea3ef07 100755
--- a/scripts/ci/check_compliance.py
+++ b/scripts/ci/check_compliance.py
@@ -1137,6 +1137,9 @@ flagged.
         "STACK_SIZE",  # Used as an example in the Kconfig docs
         "STD_CPP",  # Referenced in CMake comment
         "TEST1",
+        "TOOLCHAIN", # Defined in modules/hal_nxp/mcux/mcux-sdk-ng/basic.cmake.
+                     # It is used by MCUX SDK cmake functions to add content
+                     # based on current toolchain.
         "TOOLCHAIN_ARCMWDT_SUPPORTS_THREAD_LOCAL_STORAGE", # The symbol is defined in the toolchain
                                                     # Kconfig which is sourced based on Zephyr
                                                     # toolchain variant and therefore not visible