gnu: wcslib: Update to 7.12.

* gnu/packages/astronomy.scm (wcslib): Update to 7.12.
  [arguments]: Use Gexp, enable parallel tests.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/astronomy.scm

@@ -525,7 +525,7 @@ feature detection and cosmetic corrections.")
 (define-public wcslib
   (package
     (name "wcslib")
-    (version "7.5")
+    (version "7.12")
     (source
      (origin
        (method url-fetch)
@@ -533,26 +533,26 @@ feature detection and cosmetic corrections.")
              "ftp://ftp.atnf.csiro.au/pub/software/wcslib/wcslib-" version
              ".tar.bz2"))
        (sha256
-        (base32 "1536gmcpm6pckn9xrb6j8s4pm1vryjhzvhfaj9wx3jwxcpbdy0dw"))))
+        (base32 "1m3bx6gh5w3c7vvsqcki0x20mg8lilg13m0i8nh7za89w58dxy4w"))))
     (inputs
      (list cfitsio))
     (build-system gnu-build-system)
     (arguments
-     `(#:configure-flags
-       (list (string-append "--with-cfitsiolib="
-                            (assoc-ref %build-inputs "cfitsio") "/lib")
+     (list
+      #:configure-flags
+      #~(list (string-append "--with-cfitsiolib="
+                             #$(this-package-input "cfitsio") "/lib")
               (string-append "--with-cfitsioinc="
-                            (assoc-ref %build-inputs "cfitsio") "/include"))
+                             #$(this-package-input "cfitsio") "/include"))
       #:phases
-       (modify-phases %standard-phases
+      #~(modify-phases %standard-phases
+          (delete 'install-license-files) ; installed by ‘make install’
           (add-before 'configure 'patch-/bin/sh
             (lambda _
               (substitute* "makedefs.in"
-               (("/bin/sh") "sh"))
-             #t))
-         (delete 'install-license-files)) ; installed by ‘make install’
-       ;; Parallel execution of the test suite is not supported.
-       #:parallel-tests? #f))
+                (("/bin/sh") "sh")))))))
+    ;; TODO: Fix build with gfortran and pack missing optional pgplot.
+    ;; (inputs (list gfortran pgplot))
     (home-page "https://www.atnf.csiro.au/people/mcalabre/WCS")
     (synopsis "Library which implements the FITS WCS standard")
     (description "The FITS \"World Coordinate System\" (@dfn{WCS}) standard