+2021-12-28 Paul Eggert <eggert@cs.ucla.edu>
+
+ perl: let caller see whether perl was found
+ Problem reported for coreutils by Serge Belyshev (Bug#52844).
+ * m4/perl.m4 (gl_PERL): Use AC_CACHE_CHECK, so that
+ an invoker of gl_PERL can later inspect gl_cv_prog_perl
+ to see whether perl was found.
+
2021-12-28 Bruno Haible <bruno@clisp.org>
Fix --automake-subdir breakage (regression 2021-12-24).
-# serial 10
+# serial 11
dnl From Jim Meyering.
dnl Find a new-enough version of Perl.
AC_DEFUN([gl_PERL],
[
dnl FIXME: don't hard-code 5.005
- AC_MSG_CHECKING([for perl5.005 or newer])
+AC_CACHE_CHECK([for Perl 5.005 or newer],
+ [gl_cv_prog_perl],
+ [
if test "${PERL+set}" = set; then
# 'PERL' is set in the user's environment.
candidate_perl_names="$PERL"
perl_specified=no
fi
- found=no
- AC_SUBST([PERL])
- PERL="$am_missing_run perl"
+ gl_cv_prog_perl=no
for perl in $candidate_perl_names; do
# Run test in a subshell; some versions of sh will print an error if
# an executable is not found, even if stderr is redirected.
if ( $perl -e 'require 5.005; use File::Compare; use warnings;' ) > /dev/null 2>&1; then
- PERL=$perl
- found=yes
+ gl_cv_prog_perl=$perl
break
fi
done
+ ])
- AC_MSG_RESULT([$found])
- test $found = no && AC_MSG_WARN([
+if test "$gl_cv_prog_perl" != no; then
+ PERL=$gl_cv_prog_perl
+else
+ PERL="$am_missing_run perl"
+ AC_MSG_WARN([
WARNING: You don't seem to have perl5.005 or newer installed, or you lack
a usable version of the Perl File::Compare module. As a result,
you may be unable to run a few tests or to regenerate certain
files if you modify the sources from which they are derived.
] )
+fi
+
+AC_SUBST([PERL])
+
])