gnu: poppler: Build the poppler-glib bindings.

* gnu/packages/pdf.scm (poppler): Add Cairo and GLib as inputs.

gnu/packages/pdf.scm

@@ -31,7 +31,10 @@
   #:use-module (gnu packages libpng)
   #:use-module (gnu packages libtiff)
   #:use-module (gnu packages pkg-config)
-  #:use-module (gnu packages xorg))
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu packages glib)
+  #:use-module (gnu packages gtk)
+  #:use-module (srfi srfi-1))
 
 (define-public poppler
   (package
@@ -47,7 +50,6 @@
    ;; FIXME: more dependencies could  be added
    ;;  cairo output:       no (requires cairo >= 1.10.0)
    ;;  qt4 wrapper:        no
-   ;;  glib wrapper:       no (requires cairo output)
    ;;    introspection:    no
    ;;  use gtk-doc:        no
    ;;  use libcurl:        no
@@ -58,7 +60,14 @@
              ("libpng" ,libpng)
              ("libtiff" ,libtiff)
              ("pkg-config" ,pkg-config)
-             ("zlib" ,zlib)))
+             ("zlib" ,zlib)
+
+             ;; To build poppler-glib (as needed by Evince), we need Cairo and
+             ;; GLib.  But of course, that Cairo must not depend on Poppler.
+             ("cairo" ,(package (inherit cairo)
+                         (inputs (alist-delete "poppler"
+                                               (package-inputs cairo)))))
+             ("glib" ,glib)))
    (arguments
     `(#:tests? #f ; no test data provided with the tarball
       #:configure-flags