Make verifiable a DSO and add NAME_SUFFIX support

Build option DSO=1 generates libverifiable.so which can be
used to reduce the combined binary size.

Build option NAME_SUFFIX can be used to a add suffix to all
generated binaries. e.g. NAME_SUFFIX=_mpi

Added new make target: clean_intermediates

verifiable/Makefile

@@ -1,13 +1,18 @@
-include ../../makefiles/common.mk
+#
+# Copyright (c) 2015-2025, NVIDIA CORPORATION. All rights reserved.
+#
+# See LICENSE.txt for license information
+#
+include ../src/common.mk
 
 .PHONY: all clean
 
-BUILDDIR := $(abspath ../../build)
+BUILDDIR := $(abspath ../build)
 NCCLDIR := $(BUILDDIR)
 NVCUFLAGS += -I$(NCCLDIR)/include/ -I../include
-DST_DIR := $(BUILDDIR)/test/verifiable
+DST_DIR := $(BUILDDIR)/verifiable
 
-all: $(DST_DIR)/self_test $(DST_DIR)/verifiable.o
+all: $(DST_DIR)/self_test
 
 clean:
 	rm -rf $(DST_DIR)
@@ -18,7 +23,7 @@ include verifiable.mk
 
 self_test: $(DST_DIR)/self_test
 
-$(DST_DIR)/self_test: verifiable.cu verifiable.h
+$(DST_DIR)/self_test: main.cu $(TEST_VERIFIABLE_LIBS)
 	@printf "Linking  %s\n" $@
 	@mkdir -p $(DST_DIR)
-	$(NVCC) -o $@ $(NVCUFLAGS) -DSELF_TEST=1 verifiable.cu $(NVLDFLAGS)
+	$(NVCC) -o $@ $(NVCUFLAGS) $< -L$(TEST_VERIFIABLE_BUILDDIR) -lverifiable $(NVLDFLAGS) -Xlinker "-rpath=\$$ORIGIN"

verifiable/main.cu

@@ -0,0 +1,14 @@
+
+#include <cuda_runtime.h>
+#include <iostream>
+
+#define NCCL_VERIFIABLE_SELF_TEST 1
+#include "verifiable.h"
+
+int main(int arg_n, char **args) {
+  std::cerr<<"You are hoping to see no output beyond this line."<<std::endl;
+  cudaSetDevice(0);
+  ncclVerifiableLaunchSelfTest();
+  cudaDeviceSynchronize();
+  return 0;
+}

verifiable/verifiable.h

@@ -57,4 +57,8 @@ cudaError_t ncclVerifiableVerify(
   int64_t *bad_elt_n, cudaStream_t stream
 );
 
+#ifdef NCCL_VERIFIABLE_SELF_TEST
+void ncclVerifiableLaunchSelfTest();
+#endif
+
 #endif

verifiable/verifiable.mk

@@ -1,11 +1,18 @@
-# We requires both of the following paths to be set upon including this makefile
+# We require both of the following paths to be set upon including this makefile
 # TEST_VERIFIABLE_SRCDIR = <points to this directory>
-# TEST_VERIFIABLE_BUILDDIR = <points to destination of .o file>
+# TEST_VERIFIABLE_BUILDDIR = <points to destination of .so file>
 
 TEST_VERIFIABLE_HDRS = $(TEST_VERIFIABLE_SRCDIR)/verifiable.h
 TEST_VERIFIABLE_OBJS = $(TEST_VERIFIABLE_BUILDDIR)/verifiable.o
+TEST_VERIFIABLE_LIBS = $(TEST_VERIFIABLE_BUILDDIR)/libverifiable.so
 
-$(TEST_VERIFIABLE_BUILDDIR)/verifiable.o: $(TEST_VERIFIABLE_SRCDIR)/verifiable.cu $(TEST_VERIFY_REDUCE_HDRS)
+$(TEST_VERIFIABLE_BUILDDIR)/verifiable.o: $(TEST_VERIFIABLE_SRCDIR)/verifiable.cu $(TEST_VERIFIABLE_HDRS)
 	@printf "Compiling %s\n" $@
 	@mkdir -p $(TEST_VERIFIABLE_BUILDDIR)
-	$(NVCC) -o $@ $(NVCUFLAGS) -c $(TEST_VERIFIABLE_SRCDIR)/verifiable.cu
+	$(NVCC) -Xcompiler "-fPIC" -o $@ $(NVCUFLAGS) -c $(TEST_VERIFIABLE_SRCDIR)/verifiable.cu
+
+$(TEST_VERIFIABLE_BUILDDIR)/libverifiable.so: $(TEST_VERIFIABLE_OBJS)
+	@printf "Creating DSO %s\n" $@
+	@mkdir -p $(TEST_VERIFIABLE_BUILDDIR)
+	$(CC) -shared -o $@.0 $^ -Wl,-soname,$(notdir $@).0
+	ln -sf $(notdir $@).0 $@