Clang does not have -export-dynamic. Instead dlopen(3) teaches us to use
the -rdynamic option to cc(1).
The attached patch is needed for smtp-vilter to be able to dlopen(3) the
clamd and spamd backends on clang archs too.
/Niklas
diff --git a/mail/smtp-vilter/patches/patch-bin_smtp-vilter_Makefile
b/mail/smtp-vilter/patches/patch-bin_smtp-vilter_Makefile
index 7d6d6147b7c..30dab7adb89 100644
--- a/mail/smtp-vilter/patches/patch-bin_smtp-vilter_Makefile
+++ b/mail/smtp-vilter/patches/patch-bin_smtp-vilter_Makefile
@@ -1,7 +1,13 @@
Index: bin/smtp-vilter/Makefile
--- bin/smtp-vilter/Makefile.orig
+++ bin/smtp-vilter/Makefile
-@@ -12,7 +12,7 @@ YFLAGS= -d -p vilter
+@@ -7,12 +7,12 @@ SRCS= smtp-vilter.c engine.c imsg.c buffer.c
pftable.
+ CFLAGS+= -pthread -Wall -I{.CURDIR} -I${.CURDIR}/../../include \
+ -I/usr/src/gnu/usr.sbin/sendmail/include
+
+-LDADD+= -export-dynamic -lmilter -lpthread -L/usr/local/lib -lm
++LDADD+= -rdynamic -lmilter -lpthread -L/usr/local/lib -lm
+ YFLAGS= -d -p vilter
LFLAGS= -Pvilter -olex.yy.c
LINTFLAGS+= -u
