Remove various entries from sysconf which are never actually used.

CMakeLists.txt

@@ -143,7 +143,6 @@ endif()
 
 # Include the checking functions used later in this CMakeLists.txt
 include(CheckFunctionExists)
-include(CheckIncludeFile)
 include(CheckTypeSize)
 include(CheckLibraryExists)
 include(CheckCXXCompilerFlag)
@@ -257,9 +256,6 @@ if(CMAKE_BUILD_TYPE STREQUAL "DEBUG" OR CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINF
   set(DEBUG_BUILD TRUE)
 endif()
 
-# Check for the existence of the following include files
-check_include_file(strings.h HAVE_STRINGS_H)
-
 # Check for the existence of the following functions
 check_function_exists(umask HAVE_UMASK)
 check_function_exists(epoll_wait HAVE_EPOLL)

include/services.h

@@ -21,9 +21,6 @@
 #include <stdexcept>
 
 #include <string.h>
-#if HAVE_STRINGS_H
-# include <strings.h>
-#endif
 
 #ifndef _WIN32
 #include <unistd.h>

include/sysconf.h.cmake

@@ -14,21 +14,14 @@
 #cmakedefine DEBUG_BUILD
 
 #cmakedefine DEFUMASK @DEFUMASK@
-#cmakedefine HAVE_STRINGS_H 1
 #cmakedefine HAVE_UMASK 1
-#cmakedefine HAVE_EVENTFD 1
-#cmakedefine HAVE_EPOLL 1
-#cmakedefine HAVE_POLL 1
 #cmakedefine GETTEXT_FOUND 1
 
 #ifdef _WIN32
 # define popen _popen
 # define pclose _pclose
-# define ftruncate _chsize
 # ifdef MSVCPP
 #  define PATH_MAX MAX_PATH
 # endif
-# define MAXPATHLEN MAX_PATH
-# define bzero(buf, size) memset(buf, 0, size)
 # define sleep(x) Sleep(x * 1000)
 #endif