GNU自动化工具使用全过程详解

[root@localhost test3]# cat add.h
#ifndef _ADD_H_
#define _ADD_H_


extern int add(int, int);


#endif

[root@localhost test3]# cat add.c
#include "add.h"


int add(int a, int b)
{
        return a + b;
}

[root@localhost test3]# cat main.c
#include
#include "add.h"

int main()
{
        int a, b, c;


        a = 5;
        b = 6;


        c = add(a, b);


        printf("c = %d\n", c);


        return 0;
}

[root@localhost test3]# gcc -shared -o libadd.so add.c


1、执行autoscan
[root@localhost test3]# autoscan
[root@localhost test3]# ls
add.c  add.h  autoscan.log  configure.scan  main.c


2、编辑configure.in
[root@localhost test3]# mv configure.scan configure.in


[root@localhost test3]# cat configure.in
#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.


AC_PREREQ([2.63])
AC_INIT([main], [1.0], [[e-mail]])
AM_INIT_AUTOMAKE(main, 1.0)
AC_CONFIG_SRCDIR([main.c])
AC_CONFIG_HEADERS([config.h])


# Checks for programs.
AC_PROG_CC


# Checks for libraries.
AC_CHECK_LIB(add, add)
# Checks for header files.
AC_CHECK_HEADERS([add.h])
# Checks for typedefs, structures, and compiler characteristics.


# Checks for library functions.


AC_OUTPUT(Makefile)


3、执行aclocal
[root@localhost test3]# aclocal


4、执行autoconf
[root@localhost test3]# autoconf


5、执行autoheader
[root@localhost test3]# autoheader


6、新建Makefile.am
[root@localhost test3]# cat Makefile.am
AUTOMAKE_OPTIONS=foreign
bin_PROGRAMS=main
main_SOURCES=main.c
main_LDADD=libadd.so


7、执行automake
[root@localhost test3]# automake
configure.in:6: required file `./install-sh' not found
configure.in:6:   `automake --add-missing' can install `install-sh'
configure.in:6: required file `./missing' not found
configure.in:6:   `automake --add-missing' can install `missing'
Makefile.am: required file `./depcomp' not found
Makefile.am:   `automake --add-missing' can install `depcomp'
[root@localhost test3]# automake --add-missing
configure.in:6: installing `./install-sh'
configure.in:6: installing `./missing'
Makefile.am: installing `./depcomp'
[root@localhost test3]# automake --add-missing


7、执行./configure
[root@localhost test3]# ./configure                              
checking for a BSD-compatible install... /usr/bin/install -c     
checking whether build environment is sane... yes                
checking for a thread-safe mkdir -p... /bin/mkdir -p             
checking for gawk... gawk                                        
checking whether make sets $(MAKE)... yes                        
checking for gcc... gcc                                          
checking for C compiler default output file name... a.out        
checking whether the C compiler works... yes                     
checking whether we are cross compiling... no                    
checking for suffix of executables...                            
checking for suffix of object files... o                         
checking whether we are using the GNU C compiler... yes          
checking whether gcc accepts -g... yes                           
checking for gcc option to accept ISO C89... none needed         
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for add in -ladd... no
checking how to run the C preprocessor... gcc -E
checking for grep that handles long lines and -e... /bin/grep
checking for egrep... /bin/grep -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking add.h usability... no
checking add.h presence... no
checking for add.h... no
configure: creating ./config.status
config.status: creating Makefile
config.status: creating config.h
config.status: executing depfiles commands


8、make
[root@localhost test3]# make
make  all-am
make[1]: Entering directory `/home/xiaowan/Desktop/test3'
gcc -DHAVE_CONFIG_H -I.     -g -O2 -MT main.o -MD -MP -MF .deps/main.Tpo -c -o main.o main.c
mv -f .deps/main.Tpo .deps/main.Po
gcc  -g -O2   -o main main.o libadd.so
make[1]: Leaving directory `/home/xiaowan/Desktop/test3'


9、make install
[root@localhost test3]# make install
make[1]: Entering directory `/home/xiaowan/Desktop/test3'
test -z "/usr/local/bin" || /bin/mkdir -p "/usr/local/bin"
  /usr/bin/install -c main '/usr/local/bin'
make[1]: Nothing to be done for `install-data-am'.
make[1]: Leaving directory `/home/xiaowan/Desktop/test3'


10、导出环境变量（在当前目录下执行命令需导出环境变量）
[root@localhost test3]# export LD_LIBRARY_PATH=$PWD


11、执行./main
[root@localhost test3]# ./main
c = 11