Merge branch '3974-rpz-testlib-test-data-c-compilation-fails-on-openbsd' into 'main'

Resolve "rpz/testlib/test-data.c compilation fails on OpenBSD"

Closes #3974

See merge request isc-projects/bind9!7748

bin/tests/system/Makefile.am

@@ -66,7 +66,7 @@ rpz_dnsrps_CPPFLAGS =		\
 rpz_dnsrps_LDADD =		\
 	$(LDADD)		\
 	$(LIBDNS_LIBS)		\
-	-ldl
+	$(DLOPEN_LIBS)
 
 TESTS =
 

bin/tests/system/rpz/testlib/Makefile.am

@@ -9,4 +9,4 @@ AM_CFLAGS += -Wall -pedantic
 check_LTLIBRARIES = libdummyrpz.la
 libdummyrpz_la_SOURCES= dummylib.c test-data.c trpz.h test-data.h
 libdummyrpz_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath $(abs_builddir)
-LDADD += -lpthread -ldl
+LDADD += -lpthread $(DLOPEN_LIBS)

bin/tests/system/rpz/testlib/test-data.h

@@ -31,6 +31,22 @@
 #define LIBRPZ_LIB_OPEN 2
 #include <dns/librpz.h>
 
+#if __NAMESER < 19991006
+/*
+ * If the new API is not available define the values we use.
+ */
+
+#define ns_c_in 1
+
+#define ns_t_invalid 0
+#define ns_t_a	     1
+#define ns_t_cname   5
+#define ns_t_txt     16
+#define ns_t_aaaa    28
+#define ns_t_dname   39
+
+#endif
+
 #include "trpz.h"
 
 #define NODE_FLAG_IPV6_ADDRESS 0x1

configure.ac

@@ -108,9 +108,13 @@ AC_PROG_MKDIR_P
 # Initialize libtool
 LT_INIT([disable-static dlopen pic-only])
 
+DLOPEN_LIBS="$lt_cv_dlopen_libs"
+AC_SUBST(DLOPEN_LIBS)
+
 AS_IF([test "$enable_static" != "no" && test "$enable_developer" != "yes"],
       [AC_MSG_ERROR([Static linking is not supported as it disables dlopen() and certain security features (e.g. RELRO, ASLR)])])
 
+
 #
 # Set the default CFLAGS, CPPFLAGS, and LDFLAGS
 #