package/bind: enable static build

Static build has been disabled in 2014 with commit
6045904752 however bind can be built
statically thanks to --without-dlopen so enable it back

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/bind/0002-dlz_open_driver.c-fix-build-without-dlfcn.h.patch

@@ -0,0 +1,28 @@
+From 92b738a0fe8a7d65346de9e6dd7a8f135ee29765 Mon Sep 17 00:00:00 2001
+From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+Date: Tue, 23 Apr 2019 22:45:25 +0200
+Subject: [PATCH] dlz_open_driver.c: fix build without dlfcn.h
+
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+[Upstream status: https://gitlab.isc.org/isc-projects/bind9/issues/995]
+---
+ bin/named/unix/dlz_dlopen_driver.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/bin/named/unix/dlz_dlopen_driver.c b/bin/named/unix/dlz_dlopen_driver.c
+index 74d29ffa09..ab8a5c9493 100644
+--- a/bin/named/unix/dlz_dlopen_driver.c
++++ b/bin/named/unix/dlz_dlopen_driver.c
+@@ -14,7 +14,9 @@
+ #include <inttypes.h>
+ #include <stdlib.h>
+ #include <string.h>
++#if HAVE_DLFCN_H
+ #include <dlfcn.h>
++#endif
+ 
+ #include <dns/log.h>
+ #include <dns/result.h>
+-- 
+2.20.1
+

package/bind/Config.in

@@ -2,7 +2,6 @@ config BR2_PACKAGE_BIND
 	bool "bind"
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_TOOLCHAIN_HAS_THREADS
-	depends on !BR2_STATIC_LIBS
 	help
 	  BIND (Berkeley Internet Name Domain) is an
 	  implementation of the Domain Name System (DNS) protocols
@@ -41,6 +40,6 @@ config BR2_PACKAGE_BIND_TOOLS
 
 endif
 
-comment "bind needs a toolchain w/ threads, dynamic library"
+comment "bind needs a toolchain w/ threads"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_HAS_THREADS || BR2_STATIC_LIBS
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/bind/bind.mk

@@ -28,7 +28,6 @@ BIND_CONF_OPTS = \
 	--with-libjson=no \
 	--with-randomdev=/dev/urandom \
 	--enable-epoll \
-	--with-libtool \
 	--with-gssapi=no \
 	--enable-filter-aaaa
 
@@ -54,12 +53,13 @@ BIND_CONF_OPTS += --with-libxml2=no
 endif
 
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
-BIND_DEPENDENCIES += openssl
+BIND_DEPENDENCIES += host-pkgconf openssl
 BIND_CONF_OPTS += \
 	--with-openssl=$(STAGING_DIR)/usr \
 	--with-ecdsa=yes \
 	--with-eddsa=no \
 	--with-aes=yes
+BIND_CONF_ENV += LIBS=`$(PKG_CONFIG_HOST_BINARY) --libs openssl`
 # GOST cipher support requires openssl extra engines
 ifeq ($(BR2_PACKAGE_OPENSSL_ENGINES),y)
 BIND_CONF_OPTS += --with-gost=yes
@@ -84,6 +84,16 @@ else
 BIND_CONF_OPTS += --with-readline=no
 endif
 
+ifeq ($(BR2_STATIC_LIBS),y)
+BIND_CONF_OPTS += \
+	--without-dlopen \
+	--without-libtool
+else
+BIND_CONF_OPTS += \
+	--with-dlopen \
+	--with-libtool
+endif
+
 define BIND_TARGET_REMOVE_SERVER
 	rm -rf $(addprefix $(TARGET_DIR)/usr/sbin/, $(BIND_TARGET_SERVER_SBIN))
 endef