gnu: mupdf: Simplify package.

* gnu/packages/pdf.scm (mupdf)[source]: Drop patch and part of snippet
  modifying permissions of files added by the patch.
  [arguments]: Use #:make-flags instead of modified build and install phases.
  Drop superfluous module inclusion. Use modify-phases syntax.
* gnu/packages/patches/mupdf-buildsystem-fix.patch: Remove patch.
* gnu-system.am (dist_patch_DATA): Unregister patch.

gnu-system.am

@@ -636,7 +636,6 @@ dist_patch_DATA =						\
   gnu/packages/patches/module-init-tools-moduledir.patch	\
   gnu/packages/patches/mumps-build-parallelism.patch		\
   gnu/packages/patches/mupen64plus-ui-console-notice.patch	\
-  gnu/packages/patches/mupdf-buildsystem-fix.patch		\
   gnu/packages/patches/mutt-store-references.patch		\
   gnu/packages/patches/net-tools-bitrot.patch			\
   gnu/packages/patches/ngircd-handle-zombies.patch		\

gnu/packages/patches/mupdf-buildsystem-fix.patch

-Since openjpeg doesn't seem to ship with a .pc file, provide an alternative.
-
---- a/ojp2_cppflags.sh	1970-01-01 01:00:00.000000000 +0100
-+++ b/ojp2_cppflags.sh	2014-09-13 22:56:38.842418777 +0200
-@@ -0,0 +1,7 @@
-+#!/bin/sh
-+
-+# Return the preprocessor flags to link against openjpeg.
-+
-+cpppath=$(echo ${NIX_STORE}/*-openjpeg-*/include/openjpeg-*)
-+
-+echo -I$cpppath
-
---- a/ojp2_ldflags.sh	1970-01-01 01:00:00.000000000 +0100
-+++ b/ojp2_ldflags.sh	2014-09-13 22:56:38.842418777 +0200
-@@ -0,0 +1,7 @@
-+#!/bin/sh
-+
-+# Return the linker flags to link against openjpeg.
-+
-+ldpath=$(echo ${NIX_STORE}/*-openjpeg-*/lib)
-+
-+echo -L$ldpath -lopenjp2
-
-Make use of the above alternatives, compile with gcc.
-
---- a/Makerules	2014-09-14 09:13:40.729149860 +0200
-+++ b/Makerules	2014-09-14 09:17:06.425156595 +0200
-@@ -75,12 +75,14 @@
- 
- SYS_FREETYPE_CFLAGS = $(shell pkg-config --cflags freetype2)
- SYS_FREETYPE_LIBS = $(shell pkg-config --libs freetype2)
--SYS_OPENJPEG_CFLAGS = $(shell pkg-config --cflags libopenjp2)
--SYS_OPENJPEG_LIBS = $(shell pkg-config --libs libopenjp2)
-+SYS_OPENJPEG_CFLAGS = $(shell ./ojp2_cppflags.sh)
-+SYS_OPENJPEG_LIBS = $(shell ./ojp2_ldflags.sh)
- SYS_JBIG2DEC_LIBS = -ljbig2dec
- SYS_JPEG_LIBS = -ljpeg
- SYS_ZLIB_LIBS = -lz
- 
-+CC = gcc
-+
- endif
- 
- # The following section is an example of how to simply do cross-compilation
-
-Remove the -x11 from the built binaries, since X11 is implied on GNU. (This
-might change when Wayland gets more popular)
-
---- a/Makefile	2014-06-10 17:09:28.000000000 +0200
-+++ b/Makefile	2014-09-14 09:57:10.381235299 +0200
-@@ -255,7 +255,7 @@
- 	$(LINK_CMD)
- 
- ifeq "$(HAVE_X11)" "yes"
--MUVIEW_X11 := $(OUT)/mupdf-x11
-+MUVIEW_X11 := $(OUT)/mupdf
- MUVIEW_X11_OBJ := $(addprefix $(OUT)/platform/x11/, x11_main.o x11_image.o pdfapp.o)
- $(MUVIEW_X11_OBJ) : $(FITZ_HDR) $(PDF_HDR)
- $(MUVIEW_X11) : $(MUPDF_LIB) $(THIRD_LIBS)
-@@ -263,7 +263,7 @@
- 	$(LINK_CMD) $(X11_LIBS)
- 
- ifeq "$(HAVE_CURL)" "yes"
--MUVIEW_X11_CURL := $(OUT)/mupdf-x11-curl
-+MUVIEW_X11_CURL := $(OUT)/mupdf-curl
- MUVIEW_X11_CURL_OBJ := $(addprefix $(OUT)/platform/x11/curl/, x11_main.o x11_image.o pdfapp.o curl_stream.o)
- $(MUVIEW_X11_CURL_OBJ) : $(FITZ_HDR) $(PDF_HDR)
- $(MUVIEW_X11_CURL) : $(MUPDF_LIB) $(THIRD_LIBS) $(CURL_LIB)

gnu/packages/pdf.scm

 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2013, 2015 Andreas Enge <andreas@enge.fr>
+;;; Copyright © 2013, 2015, 2016 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2014 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2014, 2015 Ricardo Wurmus <rekado@elephly.net>
 ;;; Copyright © 2015 Paul van der Walt <paul@denknerd.org>
@@ -418,18 +418,10 @@ (define-public mupdf
                             name "-" version "-source.tar.gz"))
         (sha256
           (base32 "0qx51rj6alzcagcixm59rvdpm54w6syrwr4184v439jh14ryw4wq"))
-        (patches
-          (list (search-patch "mupdf-buildsystem-fix.patch")))
         (modules '((guix build utils)))
         (snippet
-          '(begin
             ;; Don't build the bundled-in third party libraries.
-            (delete-file-recursively "thirdparty")
-
-            ;; Make the scripts for finding openjpeg build details executable.
-            (chmod "ojp2_cppflags.sh" #o0755)
-            (chmod "ojp2_ldflags.sh" #o0755)))))
-
+            '(delete-file-recursively "thirdparty"))))
     (build-system gnu-build-system)
     (inputs
       `(("curl" ,curl)
@@ -444,22 +436,12 @@ (define-public mupdf
     (native-inputs
       `(("pkg-config" ,pkg-config)))
     (arguments
-      ;; Trying to run `$ make check' results in a no rule fault.
-      '(#:tests? #f
-
-        #:modules ((guix build gnu-build-system)
-                     (guix build utils)
-                     (srfi srfi-1))
-        #:phases (alist-replace
-                   'build
-                   (lambda _ (zero? (system* "make" "XCFLAGS=-fpic")))
-                   (alist-replace
-                     'install
-                     (lambda* (#:key outputs #:allow-other-keys)
-                       (let ((out (assoc-ref outputs "out")))
-                         (zero? (system* "make" (string-append "prefix=" out)
-                                         "install"))))
-                     (alist-delete 'configure %standard-phases)))))
+      '(#:tests? #f ; no check target
+        #:make-flags (list "CC=gcc"
+                           "XCFLAGS=-fpic"
+                           (string-append "prefix=" (assoc-ref %outputs "out")))
+        #:phases (modify-phases %standard-phases
+                  (delete 'configure))))
     (home-page "http://mupdf.com")
     (synopsis "Lightweight PDF viewer and toolkit")
     (description