package/erlang: needs threads

Due to the removal of the non-smp option threads are needed now:
https://github.com/erlang/otp/commit/ee297c32a768ec333e2a8a3ef829a7690e91d306#diff-900a5d0495caac38a1f51a2cae1b2594R974

Fixes
http://autobuild.buildroot.net/results/285/285ef07d8e0614dd90a1e4dd3ee28b116990dc0f/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/erlang/Config.in

@@ -12,15 +12,16 @@ config BR2_PACKAGE_ERLANG_ARCH_SUPPORTS
 	# erlang needs host-erlang
 	depends on BR2_PACKAGE_HOST_ERLANG_ARCH_SUPPORTS
 
-comment "erlang needs a toolchain w/ dynamic library"
+comment "erlang needs a toolchain w/ dynamic library, threads"
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_PACKAGE_ERLANG_ARCH_SUPPORTS
-	depends on BR2_STATIC_LIBS
+	depends on BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HAS_THREADS
 
 config BR2_PACKAGE_ERLANG
 	bool "erlang"
 	depends on BR2_USE_MMU # fork()
 	depends on !BR2_STATIC_LIBS
+	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on BR2_PACKAGE_ERLANG_ARCH_SUPPORTS
 	help
 	  Erlang is a programming language used to build massively

package/erlang/erlang.mk

@@ -43,10 +43,6 @@ HOST_ERLANG_CONF_OPTS = --without-javac --with-ssl=$(HOST_DIR)
 
 HOST_ERLANG_CONF_OPTS += --without-termcap
 
-ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),)
-ERLANG_CONF_OPTS += --disable-threads
-endif
-
 ifeq ($(BR2_PACKAGE_NCURSES),y)
 ERLANG_CONF_OPTS += --with-termcap
 ERLANG_DEPENDENCIES += ncurses
@@ -61,8 +57,7 @@ else
 ERLANG_CONF_OPTS += --without-ssl
 endif
 
-# ODBC support in erlang requires threads
-ifeq ($(BR2_PACKAGE_UNIXODBC)$(BR2_TOOLCHAIN_HAS_THREADS),yy)
+ifeq ($(BR2_PACKAGE_UNIXODBC),y)
 ERLANG_DEPENDENCIES += unixodbc
 ERLANG_CONF_OPTS += --with-odbc
 else