dnl Process this file with autoconf to produce a configure script.
  AC_INIT(main.cpp)
  
  dnl Checks for programs.
  AC_PROG_CXX
  dnl AC_PROG_INSTALL
  AC_PROG_MAKE_SET
  
  dnl Checks for libraries.
  dnl Replace `main' with a function in -lm:
  AC_CHECK_LIB(m, main)
  
  dnl Checks for header files.
  AC_HEADER_STDC
  AC_CHECK_HEADERS(unistd.h)
  AC_CHECK_HEADERS(string.h)
  AC_CHECK_HEADERS(iostream)
  AC_CHECK_HEADERS(ostream)
  AC_CHECK_HEADERS(fstream)
  AC_CHECK_HEADERS(iomanip)
  AC_CHECK_HEADERS(map)
  AC_CHECK_HEADERS(stdio.h)
  AC_CHECK_HEADERS(stdlib.h)
  AC_CHECK_HEADERS(math.h)
  AC_CHECK_HEADERS(time.h)
  AC_CHECK_HEADERS(list)
  AC_CHECK_HEADERS(vector)
  AC_CHECK_HEADERS(set)
  AC_CHECK_HEADERS(assert.h)
  AC_CHECK_HEADERS(sstream)
  AC_CHECK_HEADERS(float.h)
  AC_CHECK_HEADERS(limits.h)
  
  dnl Checks for typedefs, structures, and compiler characteristics.
  AC_C_CONST
  AC_TYPE_SIZE_T
  
  dnl Checks for library functions.
  dnl AC_FUNC_VPRINTF
  dnl AC_CHECK_FUNCS(strdup)
  dnl AC_CHECK_FUNC(readpipe)
  
  AC_PATH_PROGS(INSTALL, install cp copy)
  
  AC_OUTPUT(Makefile)