build(ninja): add ninja support

- Added ninja build support
- Updated readme

.gitignore

@@ -68,6 +68,35 @@ build
 # Clang
 .cache
 
+# clangd
+/.clangd/
+/compile_commands.json
+/.cache/
+
+# Ninja output
+.ninja_deps
+.ninja_log
+
+*.pyc
+*.obj
+*.ilk
+/build*/
+/build.ninja
+/ninja
+/ninja.bootstrap
+/build_log_perftest
+/canon_perftest
+/clparser_perftest
+/depfile_parser_perftest
+/hash_collision_bench
+/ninja_test
+/manifest_parser_perftest
+/graph.png
+/doc/manual.html
+/doc/doxygen
+*.patch
+.DS_Store
+
 
 input.txt
 output.txt

README.md

@@ -4,11 +4,11 @@
 
 This is a simple C++ project that includes the function for our colleagues to
 test. The function (i.e., the main function and the subfunctions used in it) is
-located in `main_lib.cpp`.
+located in `lib.cpp`.
 
 ## Additional libraries and executable
 
-Our library `Prep` is concerned with preparation of data prior to the function
+Our library `prep` is concerned with preparation of data prior to the function
 call. `test.cpp` is a single test file that will contain the tests of our colleagues
 and our own development tests. GTest is used for tests.
 
@@ -18,12 +18,22 @@ and our own development tests. GTest is used for tests.
 
 Compilation on Linux requires cmake and CXX compiler (e.g., g++).
 
+### ninja
+
 ```bash
-cd src
-mkdir build
+cmake -Gninja -Bbuild
 cd build
-cmake ../
-cmake --build .
+ninja
+./main
+```
+
+### Make
+
+```bash
+cmake -Bbuild
+cd build
+make
+./main
 ```
 
 Resulting binaries are `build/main` - the program and `build/runtests` to