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make V=s 中的 make[number] 是什么意思？

tag-icon • tag-icon compiling make gnu-make
make V=s 中的 make[number] 是什么意思？

当我能够make V=s读取make.我总是make[numer]在日志中看到。
例如：

datle@debian:~/workspace/cpx/trunk$ make
rm -rf openwrt/tmp
cp config/defaut.config openwrt/.config
cd openwrt && make
make[1]: Entering directory `/home/datle/workspace/cpx/trunk/openwrt'
make[1]: Leaving directory `/home/datle/workspace/cpx/trunk/openwrt'
make[1]: Entering directory `/home/datle/workspace/cpx/trunk/openwrt'
make[2]: Entering directory `/home/datle/workspace/cpx/trunk/openwrt'
Collecting package info: done
Collecting target info: done
Checking 'working-make'... ok.
Checking 'case-sensitive-fs'... ok.
Checking 'getopt'... ok.
Checking 'fileutils'... ok.
Checking 'working-gcc'... ok.
Checking 'working-g++'... ok.
Checking 'ncurses'... ok.
Checking 'zlib'... ok.
Checking 'gawk'... ok.
Checking 'unzip'... ok.
Checking 'bzip2'... ok.
Checking 'patch'... ok.
Checking 'perl'... ok.
Checking 'python'... ok.
Checking 'wget'... ok.
Checking 'git'... ok.
Checking 'gnutar'... ok.
Checking 'svn'... ok.
Checking 'gnu-find'... ok.
Checking 'getopt-extended'... ok.
Checking 'non-root'... ok.
make[3]: Entering directory `/home/datle/workspace/cpx/trunk/openwrt'
Checking 'openssl'... ok.
make[3]: Leaving directory `/home/datle/workspace/cpx/trunk/openwrt'
make[2]: Leaving directory `/home/datle/workspace/cpx/trunk/openwrt'
WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!
 make[2] world
 make[3] target/compile
 make[4] -C target/linux compile
 make[3] package/cleanup
 make[3] package/compile
 make[4] -C package/toolchain compile
 make[4] -C package/wireless-tools compile

我读了制作手册但我没有找到任何关于此的细节。

答案1

这些数字代表 for makelevel，这让我们知道 sub-make 与顶层的关系如何make。

这是make的递归使用，查看更多详情这里。

深入研究make源代码，你可以看到更清晰的东西。

在main.c：

/* Value of the MAKELEVEL variable at startup (or 0).  */                       

unsigned int makelevel;

进而：

/* Figure out the level of recursion.  */                                     
  {                                                                             
    struct variable *v = lookup_variable (STRING_SIZE_TUPLE (MAKELEVEL_NAME));  
    if (v && v->value[0] != '\0' && v->value[0] != '-')                         
      makelevel = (unsigned int) atoi (v->value);                               
    else                                                                        
      makelevel = 0;                                                            
  }

在output.c：

/* Use entire sentences to give the translators a fighting chance.  */        
  if (makelevel == 0)                                                           
    if (starting_directory == 0)                                                
      if (entering)                                                             
        fmt = _("%s: Entering an unknown directory\n");                         
      else                                                                      
        fmt = _("%s: Leaving an unknown directory\n");                          
    else                                                                        
      if (entering)                                                             
        fmt = _("%s: Entering directory '%s'\n");                               
      else                                                                      
        fmt = _("%s: Leaving directory '%s'\n");                                
  else

并在打印前格式化输出：

if (makelevel == 0)                                                           
    if (starting_directory == 0)                                                
      sprintf (p, fmt , program);                                               
    else                                                                        
      sprintf (p, fmt, program, starting_directory);                            
  else if (starting_directory == 0)                                             
    sprintf (p, fmt, program, makelevel);                                       
  else                                                                          
    sprintf (p, fmt, program, makelevel, starting_directory);                   

  _outputs (NULL, 0, buf);

笔记

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