diff --git a/CMakeLists.txt b/CMakeLists.txt
index 683ad1608..30eee2f74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -69,7 +69,6 @@ include(GNUInstallDirs)
 include(CheckIncludeFile)
 include(CheckIncludeFiles)
 include(CheckFunctionExists)
-include(CheckPrototypeDefinition_fixed)
 include(CheckTypeSize)
 include(CheckStructHasMember)
 include(CheckSendfile)
diff --git a/cmake/Modules/CheckPrototypeDefinition.c.in b/cmake/Modules/CheckPrototypeDefinition.c.in
deleted file mode 100644
index a97344ac3..000000000
--- a/cmake/Modules/CheckPrototypeDefinition.c.in
+++ /dev/null
@@ -1,29 +0,0 @@
-@CHECK_PROTOTYPE_DEFINITION_HEADER@
-
-static void cmakeRequireSymbol(int dummy, ...) {
-  (void) dummy;
-}
-
-static void checkSymbol(void) {
-#ifndef @CHECK_PROTOTYPE_DEFINITION_SYMBOL@
-  cmakeRequireSymbol(0, &@CHECK_PROTOTYPE_DEFINITION_SYMBOL@);
-#endif
-}
-
-@CHECK_PROTOTYPE_DEFINITION_PROTO@ {
-  return @CHECK_PROTOTYPE_DEFINITION_RETURN@;
-}
-
-#ifdef __CLASSIC_C__
-int main() {
-  int ac;
-  char*av[];
-#else
-int main(int ac, char *av[]) {
-#endif
-  checkSymbol();
-  if (ac > 1000) {
-    return *av[0];
-  }
-  return 0;
-}
diff --git a/cmake/Modules/CheckPrototypeDefinition.cmake b/cmake/Modules/CheckPrototypeDefinition.cmake
deleted file mode 100644
index 2342b3c4f..000000000
--- a/cmake/Modules/CheckPrototypeDefinition.cmake
+++ /dev/null
@@ -1,98 +0,0 @@
-# - Check if the protoype we expect is correct.
-# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
-#  FUNCTION - The name of the function (used to check if prototype exists)
-#  PROTOTYPE- The prototype to check.
-#  RETURN - The return value of the function.
-#  HEADER - The header files required.
-#  VARIABLE - The variable to store the result.
-# Example:
-#  check_prototype_definition(getpwent_r
-#   "struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
-#   "NULL"
-#   "unistd.h;pwd.h"
-#   SOLARIS_GETPWENT_R)
-# The following variables may be set before calling this macro to
-# modify the way the check is run:
-#
-#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
-#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
-#  CMAKE_REQUIRED_INCLUDES = list of include directories
-#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
-
-#=============================================================================
-# Copyright 2005-2009 Kitware, Inc.
-# Copyright 2010-2011 Andreas Schneider <asn@cryptomilk.org>
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-#
-
-
-get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
-
-
-function(CHECK_PROTOTYPE_DEFINITION _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE)
-
-  if ("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
-    set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n")
-
-    set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS})
-    if (CMAKE_REQUIRED_LIBRARIES)
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS
-        LINK_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
-    else()
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS)
-    endif()
-    if (CMAKE_REQUIRED_INCLUDES)
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES
-        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
-    else()
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES)
-    endif()
-
-    foreach(_FILE ${_HEADER})
-      set(CHECK_PROTOTYPE_DEFINITION_HEADER
-        "${CHECK_PROTOTYPE_DEFINITION_HEADER}#include <${_FILE}>\n")
-    endforeach()
-
-    set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION})
-    set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
-    set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
-
-    configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in"
-      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
-
-    file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
-
-    try_compile(${_VARIABLE}
-      ${CMAKE_BINARY_DIR}
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
-      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
-      ${CHECK_PROTOTYPE_DEFINITION_LIBS}
-      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS}
-      "${CMAKE_SYMBOL_EXISTS_INCLUDES}"
-      OUTPUT_VARIABLE OUTPUT)
-
-    if (${_VARIABLE})
-      set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n"
-        "${OUTPUT}\n\n")
-    else ()
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False")
-      set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n"
-        "${OUTPUT}\n\n${_SOURCE}\n\n")
-    endif ()
-  endif()
-
-endfunction()
diff --git a/cmake/Modules/CheckPrototypeDefinition_fixed.cmake b/cmake/Modules/CheckPrototypeDefinition_fixed.cmake
deleted file mode 100644
index 550bcaa50..000000000
--- a/cmake/Modules/CheckPrototypeDefinition_fixed.cmake
+++ /dev/null
@@ -1,98 +0,0 @@
-# - Check if the protoype we expect is correct.
-# check_prototype_definition(FUNCTION PROTOTYPE RETURN HEADER VARIABLE)
-#  FUNCTION - The name of the function (used to check if prototype exists)
-#  PROTOTYPE- The prototype to check.
-#  RETURN - The return value of the function.
-#  HEADER - The header files required.
-#  VARIABLE - The variable to store the result.
-# Example:
-#  check_prototype_definition(getpwent_r
-#   "struct passwd *getpwent_r(struct passwd *src, char *buf, int buflen)"
-#   "NULL"
-#   "unistd.h;pwd.h"
-#   SOLARIS_GETPWENT_R)
-# The following variables may be set before calling this macro to
-# modify the way the check is run:
-#
-#  CMAKE_REQUIRED_FLAGS = string of compile command line flags
-#  CMAKE_REQUIRED_DEFINITIONS = list of macros to define (-DFOO=bar)
-#  CMAKE_REQUIRED_INCLUDES = list of include directories
-#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
-
-#=============================================================================
-# Copyright 2005-2009 Kitware, Inc.
-# Copyright 2010-2011 Andreas Schneider <asn@cryptomilk.org>
-#
-# Distributed under the OSI-approved BSD License (the "License");
-# see accompanying file Copyright.txt for details.
-#
-# This software is distributed WITHOUT ANY WARRANTY; without even the
-# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-# See the License for more information.
-#=============================================================================
-# (To distribute this file outside of CMake, substitute the full
-#  License text for the above reference.)
-#
-
-
-get_filename_component(__check_proto_def_dir "${CMAKE_CURRENT_LIST_FILE}" PATH)
-
-
-function(CHECK_PROTOTYPE_DEFINITION _FUNCTION _PROTOTYPE _RETURN _HEADER _VARIABLE)
-
-  if ("${_VARIABLE}" MATCHES "^${_VARIABLE}$")
-    set(CHECK_PROTOTYPE_DEFINITION_CONTENT "/* */\n")
-
-    set(CHECK_PROTOTYPE_DEFINITION_FLAGS ${CMAKE_REQUIRED_FLAGS})
-    if (CMAKE_REQUIRED_LIBRARIES)
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS
-        ${LINK_LIBRARIES} ${CMAKE_REQUIRED_LIBRARIES})
-    else()
-      set(CHECK_PROTOTYPE_DEFINITION_LIBS)
-    endif()
-    if (CMAKE_REQUIRED_INCLUDES)
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES
-        "-DINCLUDE_DIRECTORIES:STRING=${CMAKE_REQUIRED_INCLUDES}")
-    else()
-      set(CMAKE_SYMBOL_EXISTS_INCLUDES)
-    endif()
-
-    foreach(_FILE ${_HEADER})
-      set(CHECK_PROTOTYPE_DEFINITION_HEADER
-        "${CHECK_PROTOTYPE_DEFINITION_HEADER}#include <${_FILE}>\n")
-    endforeach()
-
-    set(CHECK_PROTOTYPE_DEFINITION_SYMBOL ${_FUNCTION})
-    set(CHECK_PROTOTYPE_DEFINITION_PROTO ${_PROTOTYPE})
-    set(CHECK_PROTOTYPE_DEFINITION_RETURN ${_RETURN})
-
-    configure_file("${__check_proto_def_dir}/CheckPrototypeDefinition.c.in"
-      "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c" @ONLY)
-
-    file(READ ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c _SOURCE)
-
-    try_compile(${_VARIABLE}
-      ${CMAKE_BINARY_DIR}
-      ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/CheckPrototypeDefinition.c
-      COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
-      ${CHECK_PROTOTYPE_DEFINITION_LIBS}
-      CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${CHECK_PROTOTYPE_DEFINITION_FLAGS}
-      "${CMAKE_SYMBOL_EXISTS_INCLUDES}"
-      OUTPUT_VARIABLE OUTPUT)
-
-    if (${_VARIABLE})
-      set(${_VARIABLE} 1 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - True")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} passed with the following output:\n"
-        "${OUTPUT}\n\n")
-    else ()
-      message(STATUS "Checking prototype ${_FUNCTION} for ${_VARIABLE} - False")
-      set(${_VARIABLE} 0 CACHE INTERNAL "Have correct prototype for ${_FUNCTION}")
-      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-        "Determining if the prototype ${_FUNCTION} exists for ${_VARIABLE} failed with the following output:\n"
-        "${OUTPUT}\n\n${_SOURCE}\n\n")
-    endif ()
-  endif()
-
-endfunction()
diff --git a/distros/beowulf/copyright b/distros/beowulf/copyright
index a932efa2f..f9a69959e 100644
--- a/distros/beowulf/copyright
+++ b/distros/beowulf/copyright
@@ -41,7 +41,6 @@ Copyright: 2005-2013 Cake Software Foundation, Inc. (http://cakefoundation.org)
 License: Expat
 
 Files:
-    cmake/Modules/CheckPrototypeDefinition*.cmake
     cmake/Modules/FindGLIB2.cmake
     cmake/Modules/FindPolkit.cmake
     cmake/Modules/GNUInstallDirs.cmake
diff --git a/distros/ubuntu1604/copyright b/distros/ubuntu1604/copyright
index a932efa2f..f9a69959e 100644
--- a/distros/ubuntu1604/copyright
+++ b/distros/ubuntu1604/copyright
@@ -41,7 +41,6 @@ Copyright: 2005-2013 Cake Software Foundation, Inc. (http://cakefoundation.org)
 License: Expat
 
 Files:
-    cmake/Modules/CheckPrototypeDefinition*.cmake
     cmake/Modules/FindGLIB2.cmake
     cmake/Modules/FindPolkit.cmake
     cmake/Modules/GNUInstallDirs.cmake
diff --git a/distros/ubuntu2004/copyright b/distros/ubuntu2004/copyright
index 64189b0f4..eb5274cbf 100644
--- a/distros/ubuntu2004/copyright
+++ b/distros/ubuntu2004/copyright
@@ -41,7 +41,6 @@ Copyright: 2005-2013 Cake Software Foundation, Inc. (http://cakefoundation.org)
 License: Expat
 
 Files:
-    cmake/Modules/CheckPrototypeDefinition*.cmake
     cmake/Modules/FindGLIB2.cmake
     cmake/Modules/FindPolkit.cmake
     cmake/Modules/GNUInstallDirs.cmake