diff --git a/CMakeLists.txt b/CMakeLists.txt
index c7161317d..60f563263 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -80,7 +80,8 @@ project (Jerry CXX C ASM)
   set(PLATFORM_EXT "NUTTX")
   set(EXTERNAL_BUILD TRUE)
 
-  set(EXTERNAL_LIBC_INTERFACE "UNDEFINED" CACHE STRING "Path to external libc's include directory")
+  set(EXTERNAL_LIBC_INTERFACE "UNDEFINED" CACHE STRING "Path to external libc include directory")
+  set(EXTERNAL_LIBS_INTERFACE "UNDEFINED" CACHE STRING "Path to external libraries' include directory")
  else()
   message(FATAL_ERROR "Platform is not supported")
  endif()
@@ -91,17 +92,33 @@ project (Jerry CXX C ASM)
 
 # Should we use external libc?
  if(NOT DEFINED EXTERNAL_LIBC_INTERFACE OR EXTERNAL_LIBC_INTERFACE STREQUAL "UNDEFINED")
-  set(USE_EXTERNAL_LIBC FALSE)
+  set(USE_JERRY_LIBC TRUE)
 
-  if(${EXTERNAL_BUILD})
-   message(FATAL_ERROR "Currently, external build with Jerry's libc is not supported")
-  endif()
+  # Jerry's libc doesn't support Nuttx platform
+   if(${PLATFORM} STREQUAL "NUTTX")
+    message(FATAL_ERROR "Nuttx build doesn't support Jerry's libc implementation")
+   endif()
  else()
-  if (NOT EXISTS "${EXTERNAL_LIBC_INTERFACE}")
-   message(FATAL_ERROR "External libc interface directory doesn't exist: ${EXTERNAL_LIBC_INTERFACE}")
+  set(USE_JERRY_LIBC FALSE)
+
+  if(NOT EXISTS "${EXTERNAL_LIBC_INTERFACE}/stdlib.h")
+   message(FATAL_ERROR "It seems that external libc interface '${EXTERNAL_LIBC_INTERFACE}' doesn't provide stdlib.h header")
   endif()
 
-  set(USE_EXTERNAL_LIBC TRUE)
+  set(INCLUDE_LIBC_INTERFACE ${EXTERNAL_LIBC_INTERFACE})
+ endif()
+
+# Are there any interfaces for external libraries, other than libc, that should be registered?
+ if(DEFINED EXTERNAL_LIBS_INTERFACE AND NOT EXTERNAL_LIBS_INTERFACE STREQUAL "UNDEFINED")
+  set(INCLUDE_EXTERNAL_LIBS_INTERFACE )
+
+  foreach(EXTERNAL_LIB_INTERFACE ${EXTERNAL_LIBS_INTERFACE})
+   if (NOT EXISTS "${EXTERNAL_LIB_INTERFACE}")
+    message(FATAL_ERROR "Interface directory of the external library doesn't exist: ${EXTERNAL_LIB_INTERFACE}")
+   endif()
+
+   set(INCLUDE_EXTERNAL_LIBS_INTERFACE ${INCLUDE_EXTERNAL_LIBS_INTERFACE} ${EXTERNAL_LIB_INTERFACE})
+  endforeach()
  endif()
 
 # Build modes
@@ -163,9 +180,9 @@ project (Jerry CXX C ASM)
       "COMPACT_PROFILE"
       "COMPACT_PROFILE_MINIMAL")
 
-  # Nuttx
-   set(MODIFIERS_LISTS_NUTTX
-       ${MODIFIERS_LISTS_LINUX})
+ # Nuttx
+  set(MODIFIERS_LISTS_NUTTX
+      ${MODIFIERS_LISTS_LINUX})
 
 # Compiler / Linker flags
  set(COMPILE_FLAGS_JERRY "-fno-builtin")
@@ -278,10 +295,8 @@ project (Jerry CXX C ASM)
 
 # Component targets
  # Jerry's libc
-  if(NOT ${USE_EXTERNAL_LIBC})
+  if(${USE_JERRY_LIBC})
    add_subdirectory(jerry-libc)
-  else()
-   set(INCLUDE_LIBC_INTERFACE ${EXTERNAL_LIBC_INTERFACE})
   endif()
 
  # Jerry's Core
@@ -327,6 +342,7 @@ project (Jerry CXX C ASM)
     target_compile_definitions(${TARGET_NAME} PRIVATE ${DEFINES_JERRY})
     target_include_directories(${TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
     target_include_directories(${TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
+    target_include_directories(${TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_EXTERNAL_LIBS_INTERFACE})
     target_link_libraries(${TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME} ${LIBC_TARGET_NAME}
                           ${PREFIX_IMPORTED_LIB}libgcc ${PREFIX_IMPORTED_LIB}libgcc_eh)
 
@@ -357,6 +373,7 @@ project (Jerry CXX C ASM)
     target_compile_definitions(${MAIN_MODULE_TARGET_NAME} PRIVATE ${DEFINES_JERRY})
     target_include_directories(${MAIN_MODULE_TARGET_NAME} PRIVATE ${INCLUDE_CORE_INTERFACE})
     target_include_directories(${MAIN_MODULE_TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
+    target_include_directories(${MAIN_MODULE_TARGET_NAME} SYSTEM PRIVATE ${INCLUDE_EXTERNAL_LIBS_INTERFACE})
 
     add_custom_target(${TARGET_NAME} ALL)
     add_dependencies(${TARGET_NAME} ${MAIN_MODULE_TARGET_NAME} ${PLUGINS_TARGET_NAME} ${CORE_TARGET_NAME})
@@ -369,11 +386,7 @@ project (Jerry CXX C ASM)
                        $<TARGET_FILE:${PLUGINS_TARGET_NAME}>
                        $<TARGET_FILE:${CORE_TARGET_NAME}> > ${CMAKE_BINARY_DIR}/${TARGET_NAME}/list)
 
-    if(NOT ${USE_EXTERNAL_LIBC})
-     if(${PLATFORM} STREQUAL "NUTTX")
-      message(Nuttx build doesn't support Jerry's libc implementation)
-     endif()
-
+    if(${USE_JERRY_LIBC})
      add_dependencies(${TARGET_NAME} ${LIBC_TARGET_NAME})
     endif()
 
diff --git a/Makefile b/Makefile
index eec8d7fd8..5c77ad274 100644
--- a/Makefile
+++ b/Makefile
@@ -63,7 +63,11 @@
   endif
 
 # External build configuration
- EXTERNAL_LIBS_INTERFACE ?= $(shell pwd)/third-party/nuttx/include
+ # List of include paths for external libraries (semicolon-separated)
+  EXTERNAL_LIBS_INTERFACE ?=
+ # External libc interface
+  EXTERNAL_LIBC_INTERFACE ?= $(shell pwd)/third-party/nuttx/include
+ # Compiler to use for external build
  EXTERNAL_C_COMPILER ?= arm-none-eabi-gcc
  EXTERNAL_CXX_COMPILER ?= arm-none-eabi-g++
 
@@ -151,8 +155,9 @@ $(BUILD_DIRS_NATIVE): prerequisites
           (echo "CMake run failed. See "`pwd`"/cmake.log for details."; exit 1;)
 
 $(BUILD_DIRS_NUTTX): prerequisites
-	@ [ "$(EXTERNAL_LIBS_INTERFACE)" != "" ] && [ -x `which $(EXTERNAL_C_COMPILER)` ] && [ -x `which $(EXTERNAL_CXX_COMPILER)` ] || \
+	@ [ "$(EXTERNAL_LIBC_INTERFACE)" != "" ] && [ -x `which $(EXTERNAL_C_COMPILER)` ] && [ -x `which $(EXTERNAL_CXX_COMPILER)` ] || \
           (echo "Wrong external arguments."; \
+           echo "EXTERNAL_LIBC_INTERFACE='$(EXTERNAL_LIBC_INTERFACE)'"; \
            echo "EXTERNAL_LIBS_INTERFACE='$(EXTERNAL_LIBS_INTERFACE)'"; \
            echo "EXTERNAL_C_COMPILER='$(EXTERNAL_C_COMPILER)'"; \
            echo "EXTERNAL_CXX_COMPILER='$(EXTERNAL_CXX_COMPILER)'"; \
@@ -162,9 +167,10 @@ $(BUILD_DIRS_NUTTX): prerequisites
           cmake \
           -DENABLE_VALGRIND=$(VALGRIND) -DENABLE_LTO=$(LTO) \
           -DCMAKE_TOOLCHAIN_FILE=build/configs/toolchain_external.cmake \
-          -DEXTERNAL_LIBC_INTERFACE=${EXTERNAL_LIBS_INTERFACE} \
-          -DEXTERNAL_CMAKE_C_COMPILER=${EXTERNAL_C_COMPILER} \
-          -DEXTERNAL_CMAKE_CXX_COMPILER=${EXTERNAL_CXX_COMPILER} \
+          -DEXTERNAL_LIBC_INTERFACE="${EXTERNAL_LIBC_INTERFACE}" \
+          -DEXTERNAL_LIBS_INTERFACE="${EXTERNAL_LIBS_INTERFACE}" \
+          -DEXTERNAL_CMAKE_C_COMPILER="${EXTERNAL_C_COMPILER}" \
+          -DEXTERNAL_CMAKE_CXX_COMPILER="${EXTERNAL_CXX_COMPILER}" \
           ../../.. &>cmake.log || \
           (echo "CMake run failed. See "`pwd`"/cmake.log for details."; exit 1;)
 
diff --git a/plugins/CMakeLists.txt b/plugins/CMakeLists.txt
index 574defc87..a26e7260d 100644
--- a/plugins/CMakeLists.txt
+++ b/plugins/CMakeLists.txt
@@ -63,8 +63,7 @@ project (Jerry_Plugins CXX ASM)
         ${CMAKE_SOURCE_DIR}/third-party/STM32F4-Discovery_FW_V1.1.0)
 
    # Nuttx
-    set(INCLUDE_THIRD_PARTY_NUTTX
-        ${EXTERNAL_LIBC_INTERFACE})
+    set(INCLUDE_THIRD_PARTY_NUTTX )
 
 # Sources
  file(GLOB SOURCE_PLUGINS
@@ -108,6 +107,7 @@ project (Jerry_Plugins CXX ASM)
    target_compile_definitions(${TARGET_NAME}.lib PRIVATE ${DEFINES_PLUGINS})
    target_include_directories(${TARGET_NAME}.lib PRIVATE ${INCLUDE_PLUGINS} ${INCLUDE_CORE_INTERFACE})
    target_include_directories(${TARGET_NAME}.lib SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
+   target_include_directories(${TARGET_NAME}.lib SYSTEM PRIVATE ${INCLUDE_EXTERNAL_LIBS_INTERFACE})
    add_dependencies(plugins-all ${TARGET_NAME}.lib)
 
   # Third-party MCU library
@@ -117,6 +117,7 @@ project (Jerry_Plugins CXX ASM)
                  PROPERTY COMPILE_FLAGS "${FLAGS_COMMON_${BUILD_MODE}}")
     target_include_directories(${TARGET_NAME}${SUFFIX_THIRD_PARTY_LIB} PRIVATE ${INCLUDE_PLUGINS})
     target_include_directories(${TARGET_NAME}${SUFFIX_THIRD_PARTY_LIB} SYSTEM PRIVATE ${INCLUDE_LIBC_INTERFACE})
+    target_include_directories(${TARGET_NAME}${SUFFIX_THIRD_PARTY_LIB} SYSTEM PRIVATE ${INCLUDE_EXTERNAL_LIBS_INTERFACE})
 
     target_link_libraries(${TARGET_NAME}.lib ${TARGET_NAME}${SUFFIX_THIRD_PARTY_LIB})
    endif()