makefile文件的生成

用Autoconf及Automake来帮我们产生Makefile档了

1.用autoscan产生一个configure.in的雏型，执行autoscan後会产

生一个configure.scan的档案，我们可以用它做configure.in

档的蓝本。

% autoscan

% ls

% configure.scan hello.c

2.编辑configure.scan档，如下所示，并且把它的档名改成

configure.in

# Process this file with autoconf to produce a configure script.

AC_INIT(hello.c )

AM_INIT_AUTOMAKE(hello, 1.0)

# Checks for programs.

AC_PROG_CC

# Checks for libraries.

# Checks for header files.

# Checks for typedefs, structures, and compiler characteristics.

# Checks for library functions.

AC_OUTPUT(Makefile)

3.执行aclocal和autoconf，分别会产生aclocal.m4及configure两个档案% aclocal

% autoconf

% ls

aclocal.m4 configure configure.in hello.c

4.编辑Makefile.am档，内容如下

AUTOMAKE_OPTIONS=foreign

bin_PROGRAMS=hello

hello_SOURCES=hello.c

5.执行automake --add-missing，Automake会根据Makefile.am档产生一些档案，包含最重要的Makefile.in

%automake –add-missing

automake:configure.in:installing`./install-sh'

automake:configure.in:installing`./mkinstalldirs'

automake:configure.in:installing`./missing'

6.最後执行./configure，

% ./configure

creating cache ./config.cache

checking for a BSD compatible install... /usr/bin/in

stall -c

checking whether build environment is sane... yes

checking whether make sets ${MAKE}... yes

checking for working aclocal... found

checking for working autoconf... found

checking for working automake... found

checking for working autoheader... found

checking for working makeinfo... found

checking for gcc... gcc

checking whether the C compiler (gcc) works... yes

checking whether the C compiler (gcc) is a cross-compiler...no checking whether we are using GNU C... yes

checking whether gcc accepts -g... yes

updating cache ./config.cache

creating ./config.status

creating Makefile

现在你的目录下已经产生了一个Makefile档，下个``make''指令就可

以开始编译hello.c成执行档，执行./hello和GNU打声招呼吧！

% make

gcc -DPACKAGE=\"hello\" -DVERSION=\"1.0\" -I. -I. -g -O2 -c he

llo.c

gcc -g -O2 -o hello hello.o

% ./hello

Hello!GNU!

你还可以试试``make clean''，''make install''，''make dist''看看

会有什麽结果。你也可以把产生出来的Makefile秀给你的老板，让他从此对你刮目相看:-)