| Version 7 (modified by shunfa, 13 years ago) (diff) |
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Autotool 環境設定及範例筆記
目標
將寫好的程式碼透過以下指令就可編譯.安裝及使用
1. ./configure 2. make 3. make install
第一階段：寫好source code及 Makefile
Step2. 編輯程式碼
- 參考autotool tutorial
- 新增hello.c
/* hello.c: A standard "Hello, world!" program */ #include <stdio.h> int main(int argc, char* argv[]) { printf("Hello, world!\n"); return ; }
- 編輯Makefile(註：指令前的空白為<TAB>)
# Makefile: A standard Makefile for hello.c all: gcc hello.c -o hello clean: rm -f hello
Step3. 執行make，產生執行檔
- 執行
$ make
- 步驟結束後目錄下會有以下檔案: hello.c hello Makefile
第二階段：使用autoconf產生安裝及設定檔
Step1. 工具取得及安裝
- 工具取得 autoconf下載(v2.68)
- 安裝(步驟略)
Step2. autoscan
- 此一步驟為讓系統自動產生 configure.scan
- 將產生的configure.scan更名為configure.ac，以便日後自行修改configure時不會被覆寫掉
- 將Makefile 更名為 Makefile.in 做為日後修改的樣板
Step3. autoconf
- 產生configure的可執行檔
- 執行configure
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 configure: creating ./config.status config.status: creating Makefile config.status: error: cannot find input file: `config.h.in'
- 錯誤訊息：因為無法找到header檔
Step4. autoheader
- 執行 autoheader
- 產生header檔
- 執行configure
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 configure: creating ./config.status config.status: creating Makefile config.status: creating config.h
第三階段：修改Source Code並支援 protable
Step1. 修改hello.c
/* hello.c: A program to show the time since the Epoch */
#include <stdio.h>
#include <sys/time.h>
int main(int argc, char* argv[])
{
double sec;
struct timeval tv;
gettimeofday(&tv, NULL);
sec = tv.tv_sec;
sec += tv.tv_usec / 1000000.0;
printf("%f\n", sec);
return 0;
}
Step2. 更新設定檔 ===
$ autoscan $ mv configure.scan configure.ac $ autoconf $ autoheader $ ./configure
Step3. 修改source code使其支援protable
/* hello.c: A program to show the time since the Epoch */
#include <stdio.h>
#include "config.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
double get_sec_since_epoch()
{
double sec;
#ifdef HAVE_GETTIMEOFDAY
struct timeval tv;
gettimeofday(&tv, NULL);
sec = tv.tv_sec;
sec += tv.tv_usec / 1000000.0;
#else
sec = time(NULL);
#endif
return sec;
}
int main(int argc, char* argv[])
{
printf("%f\n", get_sec_since_epoch());
return 0;
}
Step4. 編譯及執行
$ autoscan $ ./configure $ make clean all $ ./hello
第四階段：auto make
- 下載
- 新增Makefile.am
bin_PROGRAMS=hello hello_SOURCES=hello.c
- 執行
$ automake configure.ac: no proper invocation of AM_INIT_AUTOMAKE was found. configure.ac: You should verify that configure.ac invokes AM_INIT_AUTOMAKE, configure.ac: that aclocal.m4 is present in the top-level directory, configure.ac: and that aclocal.m4 was recently regenerated (using aclocal). Makefile.am: required file `./INSTALL' not found Makefile.am: `automake --add-missing' can install `INSTALL' Makefile.am: required file `./NEWS' not found Makefile.am: required file `./README' not found Makefile.am: required file `./AUTHORS' not found Makefile.am: required file `./ChangeLog' not found Makefile.am: required file `./COPYING' not found Makefile.am: `automake --add-missing' can install `COPYING' Makefile.am: required file `./depcomp' not found Makefile.am: `automake --add-missing' can install `depcomp' /usr/local/share/automake-1.11/am/depend2.am: am__fastdepCC does not appear in AM_CONDITIONAL /usr/local/share/automake-1.11/am/depend2.am: The usual way to define `am__fastdepCC' is to add `AC_PROG_CC' /usr/local/share/automake-1.11/am/depend2.am: to `configure.ac' and run `aclocal' and `autoconf' again. /usr/local/share/automake-1.11/am/depend2.am: AMDEP does not appear in AM_CONDITIONAL /usr/local/share/automake-1.11/am/depend2.am: The usual way to define `AMDEP' is to add one of the compiler tests /usr/local/share/automake-1.11/am/depend2.am: AC_PROG_CC, AC_PROG_CXX, AC_PROG_CXX, AC_PROG_OBJC, /usr/local/share/automake-1.11/am/depend2.am: AM_PROG_AS, AM_PROG_GCJ, AM_PROG_UPC /usr/local/share/automake-1.11/am/depend2.am: to `configure.ac' and run `aclocal' and `autoconf' again.
- fix error
- done
