Add support for WITH_ERLANG_THREADS (enables threaded I/O).

1 files changed, 9 insertions, 0 deletions

diff --git a/lang/erlang14/Makefile b/lang/erlang14/Makefile
index 58e085c867f0..91879ac6ba8b 100644
--- a/lang/erlang14/Makefile
+++ b/lang/erlang14/Makefile
@@ -50,6 +50,10 @@ USE_GMAKE=	yes
 USE_PERL5=	yes
 GNU_CONFIGURE=	yes
 
+.if defined(WITH_ERLANG_THREADS)
+CONFIGURE_ARGS+=	--enable-threads
+.endif
+
 .if !defined(WITHOUT_JAVA)
 # The Java applications that are part of the Erlang distribution are
 # not strictly necessary - it is included for completeness sake. A
@@ -72,6 +76,11 @@ SCRIPT_ENV+=    PATH=${PATH}:${JAVABINDIR}
 post-patch:
 	@cd ${WRKSRC} && ${CAT} ${FILESDIR}/post-patch-configure | ${PATCH}
 
+pre-extract:
+.if !defined(WITH_ERLANG_THREADS)
+	@${ECHO_MSG} "You can enable support for threaded I/O by defining WITH_ERLANG_THREADS."
+.endif
+
 pre-configure:
 # Regenerate erts configuration script
 	cd ${WRKSRC}/erts && ${AUTOCONF}