Add nvbench::main CMake target.

Linking to this instead of `nvbench::nvbench` will automatically include
the `NVBENCH_MAIN` macro.

nvbench/CMakeLists.txt

@@ -24,8 +24,13 @@ set(srcs
 )
 
 add_library(nvbench STATIC ${srcs})
+add_library(nvbench::nvbench ALIAS nvbench)
 
 # TODO generator expressions for installed paths
 target_include_directories(nvbench PUBLIC "${nvbench_SOURCE_DIR}")
 target_link_libraries(nvbench PRIVATE fmt::fmt)
 target_compile_features(nvbench PUBLIC cuda_std_17)
+
+add_library(nvbench_main OBJECT main.cu)
+add_library(nvbench::main ALIAS nvbench_main)
+target_link_libraries(nvbench_main PUBLIC nvbench)

nvbench/main.cu

@@ -0,0 +1,6 @@
+// Provided as a CMake OBJECT library named nvbench::main so users don't have
+// to add `NVBENCH_MAIN` to every benchmark executable.
+
+#include <nvbench/main.cuh>
+
+NVBENCH_MAIN

testing/CMakeLists.txt

@@ -23,7 +23,7 @@ foreach(test_src IN LISTS test_srcs)
   string(PREPEND test_name "nvbench.test.")
   add_executable(${test_name} "${test_src}")
   target_include_directories(${test_name} PRIVATE "${CMAKE_CURRENT_LIST_DIR}")
-  target_link_libraries(${test_name} PRIVATE nvbench fmt)
+  target_link_libraries(${test_name} PRIVATE nvbench::nvbench fmt)
   set_target_properties(${test_name} PROPERTIES COMPILE_FEATURES cuda_std_17)
   add_test(NAME ${test_name} COMMAND "$<TARGET_FILE:${test_name}>")
 endforeach()