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代码清单 bogusapp.c
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_RESOLV_H
#include <resolv.h>
#endif /* HAVE_RESOLV_H */
#include "config.h"

int main(void)
{
    int reval;
#ifdef HAVE_MMAP
     fprintf(stdout, "have mmap()\n");
#else
     fprintf(stderr, "no mmap()\n");
#endif

if(HAVE_UTIME_NULL)
  fprintf(stdout, "utime() allows NULL\n");
else
  fprintf(stderr, "utime doesn't allow NULL\n");

if(SYS_SIGLIST_DECLARED)
  fprintf(stdout, "sys_siglist() declared\n");
else
  fprinf(stderr, "sys_siglist() not declared\n");

#ifdef HAVE_NCURSES_H
  fprintf(stdout, "ncurses.h found\n");
#else
  fprintf(stderr, "ncurses.h not found\n);

if(HAVE_FCNTL_H)
  fprintf(stdout, "fcntl.h found\n");
else
  fprintf(stderr, "fcntl.h not found\n");

if(HAVE_SYS_FCNTL_H)
  fprintf(stdout, "sys/fcntl.h found\n");
else
  fprintf(stderr, "sys/fcntl.h not found\n");

#ifdef NLIST_NAME_UNION
  fprintf(stdout, "nlist.n_un member found\n");
#else
  fprintf(stdout, "nlist.n_un member not found\n");
#endif

if(HAVE_VOID_POINTER)
  fprintf(stdout, "Yep, we have a usable void pointer type\n");
else
  fprintf(stderr, "Nope, no usable void pointer type\n");
exit(EXIT_SUCCESS);
}
.Makefiel.in--用于创建真正的makefile文件的模板
.acconfig.h--与特定系统相关的宏的集合,它随autoconf软件一起提供
.bogusapp.c--bogusapp的源代码,这是个示例程序
.config.h--包含bogusapp.c中用到的所有宏的头文件
.configure.in--创建最终的configure脚本的模板
.install.sh--安装脚本,用在不带兼容BSD的install程序的系统上

在目录下运行autoscan产生的configure.scan如下:
$autoscan
$cat configure.scan
dnl Process this file with autoconf to produce a configure script.
AC_INIT(acconfig.h)
dnl Checks for programs.
dnl Checks for libraries.
dnl Checks for header files.
AC_HEADER_STDC
dnl Checks for typedefs, structures, and compiler characteristics.
dnl Checks for library functions.
AC_OUTPUT(Makefile)

ifnames的输出如下:
HAVE_MMAP bogusapp.c
HAVE_NCURSES_H bogusapp.c
HAVE_RESOLV_H bogusapp.c
HAVE_NAME_UNION bogusapp.c
posted on 2005-08-04 21:24 ivaneeo 阅读(263) 评论(0)  编辑  收藏 所属分类: GNU牛力

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