Add --with-static configure switch to build unruu statically.

Makefile.am

@@ -1,5 +1,6 @@
+ACLOCAL_AMFLAGS = -I m4
 AM_CPPFLAGS = -D_FORTIFY_SOURCE=0 $(UNSHIELD_CFLAGS)
-AM_LDFLAGS = $(UNSHIELD_LDFLAGS)
+AM_LDFLAGS =  $(EXTRA_LDFLAGS) $(UNSHIELD_LDFLAGS)
 bin_PROGRAMS = unruu
 unruu_SOURCES = unruu.c
 unruu_LDADD = $(UNSHIELD_LIBS)

autogen.sh

@@ -1,7 +1,8 @@
 #!/bin/bash
 if [ "$1" == "clean" ]; then
     rm -f Makefile Makefile.in configure aclocal.m4
-    rm -f missing depcomp install-sh
+    rm -f missing depcomp install-sh  config.guess config.sub ltmain.sh
+    find m4/ -lname \* -exec rm -f {} \;
 else
     autoreconf -fsi
 fi

configure.ac

@@ -1,7 +1,16 @@
+AC_CONFIG_MACRO_DIR([m4])
 AC_INIT([unruu],[0.1])
 AM_INIT_AUTOMAKE([1.10 no-define foreign])
+AC_PROG_LIBTOOL
 AC_PROG_CC
 
+AC_ARG_WITH([static], AS_HELP_STRING([--with-static],
+            [Build unruu statically]))
+
+AS_IF([test "x$with_static" = "xyes"], [
+    AC_SUBST([EXTRA_LDFLAGS], [-all-static])
+])
+
 PKG_CHECK_MODULES([UNSHIELD], [libunshield >= 0.7], [], [AC_MSG_ERROR(
     [unruu requires at least version 0.7 of libunshield]
 )])