Fixes #24

Adds custom make targets: examples and benchmarks
From now,
`make` or `make all` will compile examples/ and benchmarks/
`make examples` will compile examples/
`make benchmarks` will compile benchmarks/
Also, benchmark folder has been renamed to benchmarks.

Author: ashok-arora

CMakeLists.txt

@@ -5,7 +5,21 @@ set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 
+if(NOT CMAKE_BUILD_TYPE)
+	set(CMAKE_BUILD_TYPE Release)
+endif()
+
+# set(CMAKE_CXX_FLAGS "-Wall -Wextra")
+set(CMAKE_CXX_FLAGS_DEBUG "-g")
+set(CMAKE_CXX_FLAGS_RELEASE "-O3")
+
 include_directories(${Matrix_SOURCE_DIR}/include)
+include_directories(${Matrix_SOURCE_DIR}/lib/benchmark/include)
+link_directories(${Matrix_SOURCE_DIR}/lib/benchmark/build/src)
+
 
+add_custom_target(examples)
 add_subdirectory(examples)
 
+add_custom_target(benchmarks)
+add_subdirectory(benchmarks)