|GNU Make Manual||www.imodulo.com · 2003-04-05|
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make prints each command line before it is executed. We call this echoing because it gives the appearance that you are typing the commands yourself.
When a line starts with
@, the echoing of that line is suppressed. The
@ is discarded before the command is passed to the shell. Typically you would use this for a command whose only effect is to print something, such as an
echo command to indicate progress through the makefile:
@echo About to make distribution files
make is given the flag
-just-print it only echoes commands, it won't execute them. Summary of Options. In this case and only this case, even the commands starting with
@ are printed. This flag is useful for finding out which commands
make thinks are necessary without actually doing them.
-silent flag to
make prevents all echoing, as if all commands started with
@. A rule in the makefile for the special target
.SILENT without prerequisites has the same effect (Special Built-in Target Names).
.SILENT is essentially obsolete since
@ is more flexible.
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