Add support for 'make check' and a dummy test.

Makefile.am

 AUTOMAKE_OPTIONS = foreign
 
+SUBDIRS = tests
+
 sbin_PROGRAMS = radsecproxy
 bin_PROGRAMS = catgconf
 noinst_LIBRARIES = librsp.a

configure.ac

@@ -92,4 +92,7 @@ AM_CONDITIONAL(HAVE_DOCBOOK2X_MAN, test "$DOCBOOK2X_MAN" = "yes")
 AC_SUBST(TARGET_CFLAGS)
 AC_SUBST(TARGET_LDFLAGS)
 AX_CHECK_SSL
-AC_OUTPUT(Makefile)
+AC_OUTPUT([
+	Makefile
+	tests/Makefile
+])

tests/Makefile.am

+check_PROGRAMS = t_fticks
+
+AM_CFLAGS = -g -Wall -Werror @TARGET_CFLAGS@
+AM_LDFLAGS = @SSL_LDFLAGS@ @TARGET_LDFLAGS@
+LDADD = $(top_builddir)/librsp.a @SSL_LIBS@
+
+TESTS = $(check_PROGRAMS)

tests/t_fticks.c

+#include "../radsecproxy.h"
+#include "../fticks.h"
+
+int
+main (int argc, char *argv[])
+{
+  uint8_t buf[128];
+
+  fticks_hashmac((const uint8_t *) "xyzzy", NULL, sizeof(buf), buf);
+  return 0;
+}