about the auto make example

first i write the a program like

 

#include <stdio.h>

#include <stdlib.h>

 

typedef struct a{

　　int a;

　　int b[];

}type_a;

// first i disagree the code will running ok , but it turn out i wrong

int main(void){

 

　　type_a * p = (type_a *) malloc(sizeof(type_a) + 100 * sizoef(int));

　　free(p);

　　return 0;

}

 

 

like first :

 i run the autoscan to make the configure.scan

then cp configure.scan to configure.in

then,change the configure.in

like that:

   AC_PREREQ([2.68])
AC_INIT([hello], [1.0], [zengfanbo2009@gmail.com])
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_SYSTEM
AM_CONFIG_HEADER(config.h)
AC_CONFIG_SRCDIR([hello.c])
#AC_CONFIG_HEADERS([config.h])
AM_INIT_AUTOMAKE([1.9])

 

#turn on the libtoolize , to make the program easy , person view
AM_PROG_LIBTOOL

# Checks for programs.
AC_PROG_CC
AC_HEADER_STDC
AC_C_BIGENDIAN
# Checks for libraries.

# Checks for header files.
AC_CHECK_HEADERS([stdlib.h,stdio.h])

# Checks for typedefs, structures, and compiler characteristics.

# Checks for library functions.
AC_FUNC_MALLOC

AC_OUTPUT(Makefile)

AC_MSG_RESULT([====================================================])
AC_MSG_RESULT([])
AC_MSG_RESULT([])
AC_MSG_RESULT([====================================================])

 

 

 

so , run the aclocal  ,haha  , it turn out run ok

so, let run the autoconf   then ,ok

run autoheader then , check if output config.in.h

 

 

then , we use the libtoolize , we will find kindness tip

add ACLOCAL_AMFLAGS = -I m4

we should write the makefile.am

 

 

ACLOCAL_AMFLAGS = -I m4

bin_PROGRAMS=hello
hello_SOURCES=hello.c

 

 

write all of them, then save

using command automake --add-missing  , you will find miss some file like AUTHORS NEWS README ChangeLog

haha , we run the command automake --add-missing , the Makefile.in is outputing.

#notice , I am  fooled. run the automake several time , but no add the missing file.

so, let run ./configure , then we will find the makefile is in the fold.

 

so , they work properly