项目一 helloworld
整个基础上仅有一个helloworld.c文件，功能也非常简单，只是向屏蔽输出一句hello。
新建一个helloworld目录，然后在里面新建一个文件helloworld.c，内容为：
#include <stdio.h>
int main(int argc, char **agrv)
{
printf("Hello, Merlin\n");
return 0;
}
执行命令autoscan生成一个架构configure.scan，将其重新命名为configure.ac（新版本使用ac后缀名，不再使用in后缀），此时目录中含有以下文件
[email protected]:~/t/hellworld$ ls autoscan.log configure.ac helloworld.c
原configure.scan的内容为：
# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. AC_PREREQ([2.69]) AC_INIT([FULL-PACKAGE-NAME], [VERSION], [BUG-REPORT-ADDRESS]) AC_CONFIG_SRCDIR([helloworld.c]) AC_CONFIG_HEADERS([config.h]) # 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
将其修改为以下样子：
# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. AC_PREREQ([2.69]) AC_INIT(helloworld, 0.1, [email protected]) AC_CONFIG_SRCDIR(helloworld.c) #AC_CONFIG_HEADERS([config.h]) AM_INIT_AUTOMAKE # 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)
AC_CONFIG_SRCDIR(helloworld.c)的功能是在./configure时检测文件helloworld.c是否存在，从而检测源码的正确性。
依次执行aclocal和autoconf两人个命令，此时文件夹中内容为：
[email protected]:~/t/hellworld$ ls aclocal.m4 autom4te.cache autoscan.log configure configure.ac helloworld.c
新建文件Makefile.am文件，并填写入以下内容：
AUTOMAKE_OPTIONS = foreign bin_PROGRAMS = helloworld helloworld_SOURCES = helloworld.c
执行automake --add-missing
[email protected]:~/t/hellworld$ automake --add-missing configure.ac:11: installing ‘./compile‘ configure.ac:8: installing ‘./install-sh‘ configure.ac:8: installing ‘./missing‘ Makefile.am: installing ‘./depcomp‘
此时文件夹中内容为：
[email protected]:~/t/hellworld$ ls aclocal.m4 compile depcomp Makefile.am autom4te.cache configure helloworld.c Makefile.in autoscan.log configure.ac install-sh missing
这个时候就可以使用./configure来生成Makefile文件了
[email protected]:~/t/hellworld$ ./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 $(MAKE)... yes checking whether make supports nested variables... yes checking for gcc... gcc checking whether the C compiler works... yes checking for C compiler default output file name... a.out checking for suffix of executables... checking whether we are cross compiling... no checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether gcc accepts -g... yes checking for gcc option to accept ISO C89... none needed checking whether gcc understands -c and -o together... yes checking for style of include used by make... GNU checking dependency style of gcc... gcc3 checking that generated files are newer than configure... done configure: creating ./config.status config.status: creating Makefile config.status: executing depfiles commands
编译出来试试：
[email protected]:~/t/hellworld$ make gcc -DPACKAGE_NAME=\"helloworld\" -DPACKAGE_TARNAME=\"helloworld\" -DPACKAGE_VERSION=\"0.1\" -DPACKAGE_STRING=\"helloworld\ 0.1\" -DPACKAGE_BUGREPORT=\"[email protected]\" -DPACKAGE_URL=\"\" -DPACKAGE=\"helloworld\" -DVERSION=\"0.1\" -I. -g -O2 -MT helloworld.o -MD -MP -MF .deps/helloworld.Tpo -c -o helloworld.o helloworld.c mv -f .deps/helloworld.Tpo .deps/helloworld.Po gcc -g -O2 -o helloworld helloworld.o [email protected]:~/t/hellworld$ ls aclocal.m4 config.log depcomp install-sh missing autom4te.cache config.status helloworld Makefile autoscan.log configure helloworld.c Makefile.am compile configure.ac helloworld.o Makefile.in [email protected]:~/t/hellworld$ ./helloworld Hello, Merlin
时间： 2024-12-21 14:36:29