图解aclocal、autoconf、automake、autoheader、configure

2014/04/30 22:54
阅读数 471
1.autoscan (autoconf): 扫描源代码以搜寻普通的可移植性问题
比如检查编译器,库,头文件等,生成文件configure.scan,它是configure.ac的一个雏形。

2.aclocal (automake):根据已经安装的宏,用户定义宏和acinclude.
m4文件中的宏将configure.ac文件所需要的宏集中定义到文件 aclocal.m4中。
aclocal是一个perl 脚本程序,
它的定义是:“aclocal - create aclocal.m4 by scanning configure.ac”
 
 
user input files   optional input     process          output files
================   ==============     =======          ============
 
                    acinclude.m4 - - - - -.
                                          V
                                      .-------,
configure.ac ------------------------>|aclocal|
                 {user macro files} ->|       |------> aclocal.m4
                                      `-------'
                                      
3.autoheader(autoconf): 根据configure.ac中的某些宏,比如cpp宏定义,运行m4,声称config.h.in
 
user input files    optional input     process          output files
================    ==============     =======          ============
 
                    aclocal.m4 - - - - - - - .
                                             |
                                             V
                                     .----------,
configure.ac ----------------------->|autoheader|----> autoconfig.h.in
                                     `----------'
                                     
4.automake: automake将Makefile.am中定义的结构建立Makefile.in,
然后configure脚本将生成的Makefile.in文件转换为Makefile。
如果在configure.ac中定义了一些特殊的宏,比如AC_PROG_LIBTOOL,
它会调用libtoolize,否则它会自己产生config.guess和config.sub
 
user input files   optional input   processes          output files
================   ==============   =========          ============
 
                                     .--------,
                                     |        | - - -> COPYING
                                     |        | - - -> INSTALL
                                     |        |------> install-sh
                                     |        |------> missing
                                     |automake|------> mkinstalldirs
configure.ac ----------------------->|        |
Makefile.am  ----------------------->|        |------> Makefile.in
                                     |        |------> stamp-h.in
                                 .---+        | - - -> config.guess
                                 |   |        | - - -> config.sub
                                 |   `------+-'
                                 |          | - - - -> config.guess
                                 |libtoolize| - - - -> config.sub
                                 |          |--------> ltmain.sh
                                 |          |--------> ltconfig
                                 `----------'
                                 
                                 
5.autoconf:将configure.ac中的宏展开,生成configure脚本。这个过程可能要用到aclocal.m4中定义的宏。
 
user input files   optional input   processes          output files
================   ==============   =========          ============
 
                   aclocal.m4 - - - - - -.
                                         V
                                     .--------,
configure.ac ----------------------->|autoconf|------> configure ----->autoconfig.h,Makefile




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