gnu: pspp: Add input cairo.

* gnu/packages/maths.scm (pspp): Add cairo and further necessary inputs.
* gnu/packages/patches/pspp-tests.patch: New file, thanks to
  John Darrington <john@darrington.wattle.id.au>.
* gnu-system.am (dist_patch_DATA): Register patch.

gnu-system.am

@@ -255,6 +255,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/perl-no-sys-dirs.patch			\
   gnu/packages/patches/plotutils-libpng-jmpbuf.patch		\
   gnu/packages/patches/procps-make-3.82.patch			\
+  gnu/packages/patches/pspp-tests.patch				\
   gnu/packages/patches/pulseaudio-test-timeouts.patch		\
   gnu/packages/patches/python-fix-dbm.patch			\
   gnu/packages/patches/qemu-multiple-smb-shares.patch		\

gnu/packages/maths.scm

@@ -26,9 +26,11 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (gnu packages compression)
+  #:use-module (gnu packages fontutils)
   #:use-module ((gnu packages gettext)
                 #:renamer (symbol-prefix-proc 'gnu:))
   #:use-module (gnu packages gcc)
+  #:use-module (gnu packages gtk)
   #:use-module (gnu packages multiprecision)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
@@ -132,12 +134,16 @@ LP/MIP solver is included in the package.")
                           version ".tar.gz"))
       (sha256
        (base32
-        "0qhxsdbwxd3cn1shc13wxvx2lg32lp4z6sz24kv3jz7p5xfi8j7x"))))
+        "0qhxsdbwxd3cn1shc13wxvx2lg32lp4z6sz24kv3jz7p5xfi8j7x"))
+      (patches (list (search-patch "pspp-tests.patch")))))
     (build-system gnu-build-system)
     (inputs
-     `(("gettext" ,gnu:gettext)
+     `(("cairo" ,cairo)
+       ("fontconfig" ,fontconfig)
+       ("gettext" ,gnu:gettext)
        ("gsl" ,gsl)
        ("libxml2" ,libxml2)
+       ("pango" ,pango)
        ("readline" ,readline)
        ("zlib" ,zlib)))
     (native-inputs
@@ -145,8 +151,7 @@ LP/MIP solver is included in the package.")
        ("pkg-config" ,pkg-config)))
     (arguments
      `(#:configure-flags
-       `("--without-cairo" ; FIXME: tests currently fail for lack of font
+       `("--without-gui"))) ; FIXME: package missing dependencies
-         "--without-gui"))) ; FIXME: package missing dependencies
     (home-page "http://www.gnu.org/software/pspp/")
     (synopsis "Statistical analysis")
     (description

gnu/packages/patches/pspp-tests.patch

@@ -0,0 +1,13 @@
+diff --git a/tests/output/render-test.c b/tests/output/render-test.c
+index 5f4c1da..e9df96c 100644
+--- a/tests/output/render-test.c
++++ b/tests/output/render-test.c
+@@ -142,7 +142,7 @@ configure_drivers (int width, int length)
+   string_map_insert (&options, "left-margin", "0");
+   string_map_insert (&options, "right-margin", "0");
+   string_map_insert_nocopy (&options, xstrdup ("paper-size"),
+-                            xasprintf ("%dx%dpt", width * 5, length * 8));
++                            xasprintf ("%dx%dpt", width * 5, length * 16));
+   driver = output_driver_create (&options);
+   if (driver == NULL)
+     exit (EXIT_FAILURE);