File: make-first-existing-target.1

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.\" ========================================================================
.\"
.IX Title "MAKE-FIRST-EXISTING-TARGET 1"
.TH MAKE-FIRST-EXISTING-TARGET 1 "2014-05-13" "perl v5.18.2" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
make\-first\-existing\-target \- runs make on one of several targets
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
make-first-existing-target [\-c cmd] target1 [target2 ...] \*(-- [make\-options]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The design of \fImake\fR\|(1) causes difficulty when you know that a Makefile
probably has one of several standardized target names, and want build
machinery to run exactly one of them, propagating any errors. \fImake\fR\|(1)
will exit 2 if a target does not exist, but an existing target may also
exit 2 due to some other failure. Makefiles cannot be reliably parsed
to find targets by anything less Turing-complete than make, and make itself
does not provide a way to enumerate the targets in a Makefile. It may not
even be possible to enumerate the targets in a Makefile without executing
part of it. (Proof of this is left as an exercise for the reader.)
.PP
This program avoids the problems described above, by attempting to call
each specified target in turn, until it observes make actually doing
something for one of them.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\-c cmd" 4
.IX Item "-c cmd"
This can be used to specify the make command to run. Default is \*(L"make\*(R".
.SH "EXIT STATUS"
.IX Header "EXIT STATUS"
The exit status is 0 if at least one target existed and was successfully
run, and nonzero otherwise.
.SH "AUTHOR"
.IX Header "AUTHOR"
Joey Hess <joey@kitenet.net>
.SH "LICENSE"
.IX Header "LICENSE"
Same as \s-1GNU\s0 make.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fImake\fR\|(1)