diff --git a/FindPreproc.cmake b/FindPreproc.cmake
new file mode 100644
index 0000000..cffb441
--- /dev/null
+++ b/FindPreproc.cmake
@@ -0,0 +1,29 @@
+if(NOT LIBPREPROC_PREFIX STREQUAL CMAKE_BINARY_DIR)
+  set(LIBPREPROC_PREFIX "" CACHE PATH "The path to the previx of an libpreproc installation")
+
+  find_path(
+    LIBPREPROC_INCLUDE_DIRS
+    NAMES preproc/mark.hpp
+    PATHS ${LIBPREPROC_PREFIX}/include)
+  find_library(
+    LIBPREPROC_LIBRARY
+    NAMES preproc
+    PATHS ${LIBPREPROC_PREFIX}/lib)
+
+  if(LIBPREPROC_INCLUDE_DIRS AND LIBPREPROC_LIBRARY)
+    get_filename_component(LIBPREPROC_LIBRARY_DIR ${LIBPREPROC_LIBRARY}
+                           DIRECTORY CACHE)
+    set(LIBPREPROC_FOUND TRUE)
+  endif()
+
+  if(LIBPREPROC_FOUND)
+    if(NOT LIBPREPROC_FIND_QUIETLY)
+      message(STATUS "Found libpreproc")
+    endif()
+    set(HAVE_LIBPREPROC 1)
+  elseif(LIBPREPROC_FOUND)
+    if(LIBPREPROC_FIND_REQUIRED)
+      message(FATAL_ERROR "Could not find libpreproc")
+    endif()
+  endif()
+endif()
diff --git a/FindPreprocThirdparty.cmake b/FindPreprocThirdparty.cmake
new file mode 100644
index 0000000..821a7b0
--- /dev/null
+++ b/FindPreprocThirdparty.cmake
@@ -0,0 +1,39 @@
+# Подключение внешних проектов
+include(ExternalProject)
+
+if(PreprocThirdparty_FIND_COMPONENTS STREQUAL "headers")
+  ExternalProject_Add(
+    libpreproc
+    SOURCE_DIR ${CMAKE_SOURCE_DIR}/thirdparty/libpreproc
+    INSTALL_DIR ${CMAKE_BINARY_DIR}
+    DOWNLOAD_COMMAND ""
+    CONFIGURE_COMMAND
+      ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
+      -DCMLIB_MAIN_DIR=${CMLIB_MAIN_DIR} ${CMLIB_EXT_PROJ_DEFAULT_ARGS}
+      <SOURCE_DIR>
+    BUILD_COMMAND true
+    INSTALL_COMMAND make preproc-install-headers)
+else()
+  ExternalProject_Add(
+    libpreproc
+    SOURCE_DIR ${CMAKE_SOURCE_DIR}/thirdparty/libpreproc
+    INSTALL_DIR ${CMAKE_BINARY_DIR}
+    DOWNLOAD_COMMAND ""
+    CONFIGURE_COMMAND
+      ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
+      -DCMLIB_MAIN_DIR=${CMLIB_MAIN_DIR} ${CMLIB_EXT_PROJ_DEFAULT_ARGS}
+      <SOURCE_DIR>)
+endif()
+
+set(LIBPREPROC_PREFIX
+    ${CMAKE_BINARY_DIR}
+    CACHE FILEPATH "" FORCE)
+set(LIBPREPROC_INCLUDE_DIRS
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_INCLUDEDIR}
+    CACHE PATH "" FORCE)
+set(LIBPREPROC_LIBRARY_DIR
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}
+    CACHE PATH "" FORCE)
+set(LIBPREPROC_LIBRARY
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libpreproc.a
+    CACHE FILEPATH "" FORCE)