Use shared libcudart patch

Make sure that `libcudart` is a shared library dependency.

recipes/nccl/meta.yaml

@@ -9,6 +9,8 @@ package:
 source:
   url: https://github.com/NVIDIA/nccl/archive/v{{ version }}-{{ revision }}.tar.gz
   sha256: ea4421061a7b9c454f2e088f68bfdbbcefab80ce81cafc70ee6c7742b1439591
+  patches:
+    - use_shared_libcudart.patch
 
 build:
   number: 0

recipes/nccl/use_shared_libcudart.patch

@@ -0,0 +1,22 @@
+From 4182db73f9e38930027a6766c7ab649783510ac0 Mon Sep 17 00:00:00 2001
+From: John Kirkham <[email protected]>
+Date: Tue, 7 May 2019 03:54:54 -0400
+Subject: [PATCH] Link `libcudart` dynamically
+
+---
+ src/Makefile | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git src/Makefile src/Makefile
+index 2d32dca78..b6022124a 100644
+--- src/Makefile
++++ src/Makefile
+@@ -29,7 +29,7 @@ LIBTARGET  := $(LIBNAME:%=%.$(NCCL_MAJOR).$(NCCL_MINOR).$(NCCL_PATCH))
+ STATICLIBTARGET := $(STATICLIBNAME)
+ LIBOBJ     := $(LIBSRCFILES:%.cc=$(OBJDIR)/%.o)
+ DEPFILES   := $(LIBOBJ:%.o=%.d)
+-LDFLAGS    += -L${CUDA_LIB} -lcudart_static -lpthread -lrt -ldl
++LDFLAGS    += -L${CUDA_LIB} -lcudart -lpthread -lrt -ldl
+
+ DEVICELIB  := $(BUILDDIR)/obj/collectives/device/colldevice.a
+