* Perl (http://www.perl.org/), version 5.005_03 or later. Perl is
required during build but not after installation.
+ * Python (https://python.org/), version 2.7. Some tests require
+ Python; if it is missing, those tests will be skipped. PSPP
+ does not otherwise require Python.
+
* iconv, which should be installed as part of a Unix-like system.
If you don't have a version already, you can install GNU
libiconv (http://www.gnu.org/software/libiconv/).
0.18 and 0.19 have a bug that will prevent library detection,
but other versions should be fine.
- * GTK+ (http://www.gtk.org/), version 3.14.5 or later.
+ * GTK+ (http://www.gtk.org/), version 3.18.0 or later.
It has been reported that versions prior to 3.22.x give problems,
so a recent version is recommended.