53 lines
1.5 KiB
Text
53 lines
1.5 KiB
Text
# perl.m4
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# serial 11
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dnl Copyright (C) 1998-2001, 2003-2004, 2007, 2009-2025 Free Software
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dnl Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl This file is offered as-is, without any warranty.
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dnl From Jim Meyering.
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dnl Find a new-enough version of Perl.
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AC_DEFUN([gl_PERL],
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[
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dnl FIXME: don't hard-code 5.005
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AC_CACHE_CHECK([for Perl 5.005 or newer],
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[gl_cv_prog_perl],
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[
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if test "${PERL+set}" = set; then
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# 'PERL' is set in the user's environment.
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candidate_perl_names="$PERL"
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perl_specified=yes
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else
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candidate_perl_names='perl perl5'
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perl_specified=no
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fi
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gl_cv_prog_perl=no
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for perl in $candidate_perl_names; do
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# Run test in a subshell; some versions of sh will print an error if
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# an executable is not found, even if stderr is redirected.
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if ( $perl -e 'require 5.005; use File::Compare; use warnings;' ) > /dev/null 2>&1; then
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gl_cv_prog_perl=$perl
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break
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fi
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done
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])
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if test "$gl_cv_prog_perl" != no; then
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PERL=$gl_cv_prog_perl
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else
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PERL="$am_missing_run perl"
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AC_MSG_WARN([
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WARNING: You don't seem to have perl5.005 or newer installed, or you lack
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a usable version of the Perl File::Compare module. As a result,
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you may be unable to run a few tests or to regenerate certain
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files if you modify the sources from which they are derived.
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] )
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fi
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AC_SUBST([PERL])
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])
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