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5 Writing the Commands in Rules
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The commands of a rule consist of one or more shell command lines to be
executed, one at a time, in the order they appear. Typically, the
result of executing these commands is that the target of the rule is
brought up to date.
Users use many different shell programs, but commands in makefiles
are always interpreted by `/bin/sh' unless the makefile specifies
otherwise. Command Execution Execution.
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* Command Syntax Command syntax features and pitfalls.
* Echoing How to control when commands are echoed.
* Execution How commands are executed.
* Parallel How commands can be executed in parallel.
* Errors What happens after a command execution error.
* Interrupts What happens when a command is interrupted.
* Recursion Invoking `make' from makefiles.
* Sequences Defining canned sequences of commands.
* Empty Commands Defining useful, do-nothing commands.
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