build: be more careful about Perl

Problem reported by Serge Belyshev (Bug#52844).
* configure.ac (HAVE_PERL): Rely on latest Gnulib gl_PERL, which
sets gl_cv_prog_perl.

diff --git a/configure.ac b/configure.ac
index 9b8ea0dde72a95da1484d8d03db6e90f85661cb4..b982d7e9acf26767b5f0c645d11349438e4c9f9e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -64,11 +64,7 @@ gl_INIT
 coreutils_MACROS
 
 # The test suite needs to know if we have a working perl.
-# FIXME: this is suboptimal.  Ideally, we would be able to call gl_PERL
-# with an ACTION-IF-NOT-FOUND argument ...
-cu_have_perl=yes
-case $PERL in *"/missing "*) cu_have_perl=no;; esac
-AM_CONDITIONAL([HAVE_PERL], [test $cu_have_perl = yes])
+AM_CONDITIONAL([HAVE_PERL], [test "$gl_cv_prog_perl" != no])
 
 # gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
 # ------------------------------------------------