gnu: slim: Upgrade to 1.3.6; allow the choice of a config file at run time.

* gnu/packages/slim.scm (slim): Upgrade to 1.3.6.  Add patches.  Comment
  out systemd-related stuff from CMakeLists.txt.  Add
  "-DBUILD_SHARED_LIBS=OFF" and "-DCMAKE_SKIP_BUILD_RPATH=ON" to
  #:configure-flags.  Adjust 'home-page' field.
* gnu/packages/patches/slim-config.patch,
  gnu/packages/patches/slim-session.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.

gnu-system.am

@@ -296,6 +296,8 @@ dist_patch_DATA =						\
   gnu/packages/patches/readline-link-ncurses.patch		\
   gnu/packages/patches/ripperx-libm.patch			\
   gnu/packages/patches/scheme48-tests.patch			\
+  gnu/packages/patches/slim-session.patch			\
+  gnu/packages/patches/slim-config.patch			\
   gnu/packages/patches/tcsh-fix-autotest.patch			\
   gnu/packages/patches/teckit-cstdio.patch			\
   gnu/packages/patches/valgrind-glibc.patch			\

gnu/packages/patches/slim-config.patch

@@ -0,0 +1,27 @@
+Allow the configuration file and theme directory to be specified at run time.
+Patch by Eelco Dolstra, from Nixpkgs.
+
+--- slim-1.3.6/app.cpp	2013-10-02 00:38:05.000000000 +0200
++++ slim-1.3.6/app.cpp	2013-10-15 11:02:55.629263422 +0200
+@@ -200,7 +200,9 @@
+ 
+ 	/* Read configuration and theme */
+ 	cfg = new Cfg;
+-	cfg->readConf(CFGFILE);
++	char *cfgfile = getenv("SLIM_CFGFILE");
++	if (!cfgfile) cfgfile = CFGFILE;
++	cfg->readConf(cfgfile);
+ 	string themebase = "";
+ 	string themefile = "";
+ 	string themedir = "";
+@@ -208,7 +210,9 @@
+ 	if (testing) {
+ 		themeName = testtheme;
+ 	} else {
+-		themebase = string(THEMESDIR) + "/";
++		char *themesdir = getenv("SLIM_THEMESDIR");
++		if (!themesdir) themesdir = THEMESDIR;
++		themebase = string(themesdir) + "/";
+ 		themeName = cfg->getOption("current_theme");
+ 		string::size_type pos;
+ 		if ((pos = themeName.find(",")) != string::npos) {

gnu/packages/patches/slim-session.patch

@@ -0,0 +1,17 @@
+Exit after the user's session has finished.  This works around slim's broken
+PAM session handling (see
+http://developer.berlios.de/bugs/?func=detailbug&bug_id=19102&group_id=2663).
+
+Patch by Eelco Dolstra, from Nixpkgs.
+
+--- slim-1.3.6/app.cpp	2013-10-15 11:02:55.629263422 +0200
++++ slim-1.3.6/app.cpp	2013-10-15 13:00:10.141210784 +0200
+@@ -816,7 +822,7 @@
+ 	StopServer();
+ 	RemoveLock();
+ 	while (waitpid(-1, NULL, WNOHANG) > 0); /* Collects all dead childrens */
+-	Run();
++	exit(OK_EXIT);
+ }
+ 
+ void App::KillAllClients(Bool top) {

gnu/packages/slim.scm

@@ -1,5 +1,6 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013 Guy Grant <gzg@riseup.net>
+;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -23,6 +24,7 @@
   #:use-module (guix download)
   #:use-module (guix build-system cmake)
   #:use-module (guix packages)
+  #:use-module (gnu packages)
   #:use-module (gnu packages gl)
   #:use-module (gnu packages xorg)
   #:use-module (gnu packages libpng)
@@ -34,13 +36,17 @@
 (define-public slim
   (package
     (name "slim")
-    (version "1.3.3")
+    (version "1.3.6")
     (source (origin
 	     (method url-fetch)
-	     (uri (string-append "mirror://sourceforge/project/slim.berlios/slim-"
+             ;; Used to be available from
+             ;; mirror://sourceforge/project/slim.berlios/.
+	     (uri (string-append "http://download.berlios.de/slim/slim-"
 				  version ".tar.gz"))
 	     (sha256
-	      (base32 "1fdvipj3658s8dm78djmfr8xhg6l8rr7kc4qcb34bjrnkkclhln1"))))
+	      (base32 "1pqhk22jb4aja4hkrm7rjgbgzjyh7i4zswdgf5nw862l2znzxpi1"))
+             (patches (map search-patch
+                           (list "slim-config.patch" "slim-session.patch")))))
     (build-system cmake-build-system)
     (inputs `(("linux-pam" ,linux-pam)
 	      ("libpng" ,libpng)
@@ -62,12 +68,23 @@
 		 (lambda _
 		   (substitute* "CMakeLists.txt"
 		     (("/etc")
-		      (string-append
-		       (assoc-ref %outputs "out") "/etc"))))
+		      (string-append (assoc-ref %outputs "out") "/etc"))
+                     (("install.*systemd.*")
+                      ;; The build system's logic here is: if "Linux", then
+                      ;; "systemd".  Strip that.
+                      "")))
 		 %standard-phases)
-       #:configure-flags '("-DUSE_PAM=yes" "-DUSE_CONSOLEKIT=no")
+       #:configure-flags '("-DUSE_PAM=yes" "-DUSE_CONSOLEKIT=no"
+
+                           ;; Don't build libslim.so, because then the build
+                           ;; system is unable to set the right RUNPATH on the
+                           ;; 'slim' binary.
+                           "-DBUILD_SHARED_LIBS=OFF"
+
+                           ;; Leave a valid RUNPATH upon install.
+                           "-DCMAKE_SKIP_BUILD_RPATH=ON")
        #:tests? #f))
-    (home-page "http://www.slim.berlios.de/")
+    (home-page "http://slim.berlios.de/")
     (synopsis "Desktop-independent graphcal login manager for X11")
     (description
      "SLiM is a Desktop-independent graphical login manager for X11, derived