gnu: Add 'lvm2-static'.

* gnu/packages/patches/lvm2-static-link.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/linux.scm (lvm2)[source](patches): New field.
(lvm2-static): New variable.

gnu/local.mk

@@ -705,6 +705,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/luajit-no_ldconfig.patch			\
   %D%/packages/patches/luajit-symlinks.patch			\
   %D%/packages/patches/luit-posix.patch				\
+  %D%/packages/patches/lvm2-static-link.patch			\
   %D%/packages/patches/make-impure-dirs.patch			\
   %D%/packages/patches/mars-install.patch			\
   %D%/packages/patches/mars-sfml-2.3.patch			\

gnu/packages/linux.scm

@@ -1683,7 +1683,8 @@ time.")
                     (("confdir = .*$")
                      "confdir = @sysconfdir@\n")
                     (("DEFAULT_SYS_DIR = @DEFAULT_SYS_DIR@")
-                     "DEFAULT_SYS_DIR = @sysconfdir@"))))))
+                     "DEFAULT_SYS_DIR = @sysconfdir@"))))
+              (patches (search-patches "lvm2-static-link.patch"))))
     (build-system gnu-build-system)
     (native-inputs
      `(("pkg-config" ,pkg-config)
@@ -1738,6 +1739,22 @@ mapper.  Kernel components are part of Linux-libre.")
     ;; Command-line tools are GPLv2.
     (license (list license:gpl2 license:lgpl2.1))))
 
+(define-public lvm2-static
+  (package
+    (inherit lvm2)
+    (name "lvm2-static")
+
+    ;; Propagate udev because libdevmapper.a depends on libudev.
+    (inputs (alist-delete "udev" (package-inputs lvm2)))
+    (propagated-inputs `(("udev" ,eudev)))
+
+    (arguments
+     (substitute-keyword-arguments (package-arguments lvm2)
+       ((#:configure-flags flags '())
+        ;; LVM2 doesn't use Libtool, hence the custom option.
+        `(cons "--enable-static_link" ,flags))))
+    (synopsis "Logical volume management for Linux (statically linked)")))
+
 (define-public wireless-tools
   (package
     (name "wireless-tools")

gnu/packages/patches/lvm2-static-link.patch

@@ -0,0 +1,14 @@
+Fix static linking of 'lvm.static', which indirectly depend on libpthread
+via libdevmapper.a.
+
+--- LVM2.2.02.166/tools/Makefile.in	2016-11-22 21:31:15.521045149 +0100
++++ LVM2.2.02.166/tools/Makefile.in	2016-11-22 21:31:24.085082767 +0100
+@@ -148,7 +148,7 @@ endif
+ 
+ lvm.static: $(OBJECTS) lvm-static.o $(top_builddir)/lib/liblvm-internal.a  $(interfacebuilddir)/libdevmapper.a
+ 	$(CC) $(CFLAGS) $(LDFLAGS) -static -L$(interfacebuilddir) -o $@ \
+-	      $(OBJECTS) lvm-static.o $(LVMLIBS) $(STATIC_LIBS) $(LIBS)
++	      $(OBJECTS) lvm-static.o $(LVMLIBS) $(STATIC_LIBS) $(LIBS) $(PTHREAD_LIBS)
+ 
+ liblvm2cmd.a: $(top_builddir)/lib/liblvm-internal.a $(OBJECTS) lvmcmdlib.o lvm2cmd.o
+ 	cat $(top_builddir)/lib/liblvm-internal.a > $@