Unix - " xargs" - 输出“在中间” （不是最后！） [英] Unix - "xargs" - output "in the middle" (not at the end!)

问题描述

  ls | xargs echo 
  

它与（假设我有 someFile 和 someDir / 在工作目录中）：



  echo someFile someDir 
  

so xargs 取其输入并将它放在下一个命令的最后（这里是echo的结尾）。

但有时我想要 xargs 将其输入放置在下一个命令的中间中。

例如：

  find。 -type f -name* .cpp-print | xargs g ++ -o outputFile 
  

所以如果我在当前目录中有 a .cpp ， b.cpp ， c.cpp 输出将与命令：

  g ++ -o outputFile a.cpp b.cpp c.cpp 
  

但我想要这样：

  g ++ a.cpp b.cpp c.cpp -o outputFile 
  

有没有办法这样做吗？

PS：在某些情况下我需要它，因为例如：

  i586-mingw32msvc-g ++ -o outputFile`pkg-config --cflags --libs gtkmm-2.4` a.cpp b.cpp c.cpp 
  

不起作用，但这个工作正常：

  i586- mingw32msvc-g ++ a.cpp b.cpp c.cpp -o outputFile`pkg-config --cflags --libs gtkmm-2.4` 
  

$ b $如果您的xargs版本不包含 -I 功能，则替代方案i s写一个包含要执行的命令的小shell脚本：

 ＃！/ bin / sh 
 exec i586-mingw32msvc-g ++$ @-o outputFile ... 
  

然后使用xargs来运行：

  find。 -type f -name* .cpp-print | xargs my_gcc_script 
  

example use of xargs application in Unix can be something like this:

ls | xargs echo

which is the same as (let's say I have someFile and someDir/ in the working directory):

echo someFile someDir

so xargs take its input and place it at the end of the next command (here at the end of echo).

But sometimes I want xargs to place its input somewhere in the middle of next command.

For example:

find . -type f -name "*.cpp" -print | xargs g++ -o outputFile

so if I had in the current directory files a.cpp, b.cpp, c.cpp the output would be the same as with the command:

g++ -o outputFile a.cpp b.cpp c.cpp

but I want to have something like this:

g++ a.cpp b.cpp c.cpp -o outputFile

Is there a way to do it?

P.S.: I need it in some cases, because e.g.:

i586-mingw32msvc-g++ -o outputFile `pkg-config --cflags --libs gtkmm-2.4` a.cpp b.cpp c.cpp

doesn't work but this one works fine:

i586-mingw32msvc-g++ a.cpp b.cpp c.cpp -o outputFile `pkg-config --cflags --libs gtkmm-2.4`

解决方案

If your version of xargs doesn't include the -I feature, an alternative is to write a little shell script containing the command you want to execute:

#!/bin/sh
exec i586-mingw32msvc-g++ "$@" -o outputFile...

Then use xargs to run that:

find . -type f -name "*.cpp" -print | xargs my_gcc_script

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