Version 0.0013

- Fix CPAN RT #147612. The "perl Makefile.PL" step would fail if
  Math::GMPz was not installed.

- Add test file t/02gmpcompat.t to verify that the GMP library is
  compatible, i.e., recent enough.

CHANGES

@@ -1,3 +1,8 @@
+0.0013 2023-09-21
+
+ * Fix CPAN RT #147612. The "perl Makefile.PL" step would fail if Math::GMPz
+   was not installed.
+
 0.0012 2023-09-20
 
  * Sync test files with Math-BigInt.

Makefile.PL

@@ -4,6 +4,8 @@ use strict;
 use warnings;
 use ExtUtils::MakeMaker;
 
+print "\nThis module requires gmp-5.1.0 (or later)\n\n";
+
 WriteMakefile
   (
    'NAME'               => 'Math::BigInt::GMPz',
@@ -53,18 +55,3 @@ WriteMakefile
         },
     },
   );
-
-###############################################################################
-# It might be that Math::GMPz was built with an newer version of GMP than the
-# one that is currently available. Checking Math::GMPz::gmp_v() won't help,
-# since it returns the version of GMP used when Math::GMPz was built, not the
-# version of GMP that is currently available.
-
-use Math::GMPz 0.36 qw< :mpz >;
-
-eval { my $x = Rmpz_init(); Rmpz_2fac_ui($x, 0); };
-
-# If Rmpz_2fac_ui() is not implemented, Math::GMPz dies with the message:
-# "Rmpz_2fac_ui not implemented - gmp-5.1.0 (or later) is needed"
-
-die "gmp-5.1.0 (or later) is needed" if $@;

lib/Math/BigInt/GMPz.pm

@@ -8,7 +8,7 @@ use Math::BigInt::Lib 1.999801;
 
 our @ISA = qw< Math::BigInt::Lib >;
 
-our $VERSION = '0.0012';
+our $VERSION = '0.0013';
 
 use Math::GMPz 0.36 qw< :mpz >;
 

t/02gmpcompat.t

@@ -0,0 +1,24 @@
+# -*- mode: perl; -*-
+
+use strict;
+use warnings;
+
+use Test::More tests => 2;
+
+#use Math::GMPz 0.36 qw< :mpz >;
+BEGIN { use_ok("Math::GMPz", 0.36, ":mpz") }
+
+# We need GMP 5.1.0 or newer for Rmpz_2fac_ui().
+
+# It might be that Math::GMPz was built with a newer version of GMP than the
+# one that is currently available. Checking Math::GMPz::gmp_v() won't help,
+# since it seems to return the version of GMP used when Math::GMPz was built,
+# not the version of GMP that is currently available.
+
+# If Rmpz_2fac_ui() is not implemented, Math::GMPz dies with the message:
+# "Rmpz_2fac_ui not implemented - gmp-5.1.0 (or later) is needed"
+
+eval { my $x = Rmpz_init(); Rmpz_2fac_ui($x, 0); };
+ok(! $@, "gmp-5.1.0 (or later) is available") or diag <<"EOF"
+  The version of the GMP library that is used by Math::GMPz is too old.
+EOF