diff --git a/FindPreprocmath.cmake b/FindPreprocmath.cmake
new file mode 100644
index 0000000..3150c96
--- /dev/null
+++ b/FindPreprocmath.cmake
@@ -0,0 +1,29 @@
+if(NOT LIBPREPROCMATH_PREFIX STREQUAL CMAKE_BINARY_DIR)
+  set(LIBPREPROCMATH_PREFIX "" CACHE PATH "The path to the previx of an libpreprocmath installation")
+
+  find_path(
+    LIBPREPROCMATH_INCLUDE_DIRS
+    NAMES preprocmath/params.hpp
+    PATHS ${LIBPREPROCMATH_PREFIX}/include)
+  find_library(
+    LIBPREPROCMATH_LIBRARY
+    NAMES preprocmath
+    PATHS ${LIBPREPROCMATH_PREFIX}/lib)
+
+  if(LIBPREPROCMATH_INCLUDE_DIRS AND LIBPREPROCMATH_LIBRARY)
+    get_filename_component(LIBPREPROCMATH_LIBRARY_DIR ${LIBPREPROCMATH_LIBRARY}
+                           DIRECTORY CACHE)
+    set(LIBPREPROCMATH_FOUND TRUE)
+  endif()
+
+  if(LIBPREPROCMATH_FOUND)
+    if(NOT LIBPREPROCMATH_FIND_QUIETLY)
+      message(STATUS "Found libpreprocmath")
+    endif()
+    set(HAVE_LIBPREPROCMATH 1)
+  elseif(LIBPREPROCMATH_FOUND)
+    if(LIBPREPROCMATH_FIND_REQUIRED)
+      message(FATAL_ERROR "Could not find libpreprocmath")
+    endif()
+  endif()
+endif()
diff --git a/FindPreprocmathThirdparty.cmake b/FindPreprocmathThirdparty.cmake
new file mode 100644
index 0000000..080706c
--- /dev/null
+++ b/FindPreprocmathThirdparty.cmake
@@ -0,0 +1,39 @@
+# Подключение внешних проектов
+include(ExternalProject)
+
+if(${PreprocmathThirdparty_FIND_COMPONENTS} STREQUAL "headers")
+  ExternalProject_Add(
+    libpreprocmath
+    SOURCE_DIR ${CMAKE_SOURCE_DIR}/thirdparty/libpreprocmath
+    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 preprocmath-install-headers)
+else()
+  ExternalProject_Add(
+    libpreprocmath
+    SOURCE_DIR ${CMAKE_SOURCE_DIR}/thirdparty/libpreprocmath
+    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(LIBPREPROCMATH_PREFIX
+    ${CMAKE_BINARY_DIR}
+    CACHE FILEPATH "" FORCE)
+set(LIBPREPROCMATH_INCLUDE_DIRS
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_INCLUDEDIR}
+    CACHE PATH "" FORCE)
+set(LIBPREPROCMATH_LIBRARY_DIR
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}
+    CACHE PATH "" FORCE)
+set(LIBPREPROCMATH_LIBRARY
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libpreprocmath.a
+    CACHE FILEPATH "" FORCE)