We need libpopt-dev to compile the utilities.

Add a test to configure to verify popt development libraries are available
and print an error and exit otherwise.

configure.ac

@@ -54,6 +54,40 @@ if test x"$libiscsi_cv_HAVE_SOCK_SIN_LEN" = x"yes"; then
     AC_DEFINE(HAVE_SOCK_SIN_LEN,1,[Whether the sockaddr_in struct has a sin_len property])
 fi
 
+AC_MSG_CHECKING(whether libpopt is available)
+ac_save_CFLAGS="$CFLAGS"
+ac_save_LIBS="$LIBS"
+CFLAGS="$CFLAGS $GLIB_CFLAGS"
+LIBS="$GLIB_LIBS $LIBS -lpopt"
+AC_TRY_RUN([
+/*
+ * Just see if we can compile/link with popt
+ */
+#include <popt.h>
+
+int main(int argc, const char *argv[])
+{
+	struct poptOption popt_options[] = {
+		POPT_TABLEEND
+	};
+	poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
+
+	return 0;
+}
+], ac_cv_have_popt=yes, ac_cv_have_popt=no,
+   [echo $ac_n "compile with POPT. Assuming OK... $ac_c"
+    ac_cv_have_popt=yes])
+CFLAGS="$ac_save_CFLAGS"
+LIBS="$ac_save_LIBS"
+if test "$ac_cv_have_popt" = yes ; then
+  AC_MSG_RESULT(yes)
+else
+  AC_MSG_RESULT(no)
+  AC_MSG_NOTICE(You need libpopt to compile libiscsi. Install the libpopt-dev package.)
+  exit
+fi
+
+
 AC_SUBST(libdir)
 #AC_SUBST(LIBISCSI_LDFLAGS)