Makefile 在后台运行进程
我的 Makefile 中有这个：
run:
for x in *.bin ; do ./$$x ; done
这样它就可以一一启动所有可执行文件。我想这样做：
run:
for x in *.bin ; do ./$$x &; done
以便它启动每个可执行文件并将其放在后台。当我输入 & 符号时，上述语句出现语法错误。
我不想将 make 调用为 make & 因为这将在后台运行进程，但仍然一个接一个地运行，而我希望单个可执行文件在后台运行，以便在任何情况下即时我有多个可执行文件正在运行。
先感谢您。
I have this in my Makefile:
run:
for x in *.bin ; do ./$x ; done
such that it launches all executables one by one. I want to do this:
run:
for x in *.bin ; do ./$x &; done
so that it starts each executable and puts it in the background. I get a syntax error for the above statement when I put the ampersand.
I dont want to invoke the make as make & since this will run processes in the background but still one by one, whereas I want individual executables to run in the background, so that at any instant I have more than one executable running.
Thank you in advance.
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尝试通过子 shell 执行：
也许
make -j是更好的选择。尝试使用如下所示的Makefile：然后使用
make -j执行，其中Try to execute via a subshell:
Maybe
make -jis a better option. Try aMakefilethat looks something like this:And then execute with
make -j <jobs>where<jobs>is number of simultaneous jobs to run.您收到的语法错误是 shell 语法错误，而不是 make 语法问题。 & 符号实际上是一个 命令终止符/分隔符，就像分号是；因此，表达您想要的 for 循环的方法是：
但是，正如其他人所指出的，在实用的情况下，直接将事物表达为 make 依赖项通常比复杂的 shell 片段和 shell 循环更灵活。
The syntax error you're getting is a shell syntax error, rather than a problem with make syntax. The ampersand is in fact a command terminator/separator, just as semicolon is; so the way to express the for loop you want is:
However, as others have noted, where it's practical it's usually more flexible to express things directly as make dependencies rather than complicated shell snippets and shell loops.
尝试：
() 在子 shell 中运行命令。
Try:
The ()'s run the command in a subshell.