kraken: bootstrap build system

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+project(kraken VERSION 0.0.0 LANGUAGES CXX)
+enable_testing()
+
+# Add a dummy target to share all our compile options
+add_library(common_options INTERFACE)
+target_compile_features(common_options INTERFACE
+  cxx_std_20
+)
+target_compile_options(common_options INTERFACE
+  -Wall
+  -Wextra
+)
+target_include_directories(common_options INTERFACE
+  src
+)
+
+add_subdirectory(src)
+add_subdirectory(tests)

src/CMakeLists.txt

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+add_executable(kraken kraken.cc)
+target_link_libraries(kraken PRIVATE common_options)
+
+install(TARGETS kraken)

src/kraken.cc

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+#include <iostream>
+
+int main() {
+    std::cout << "Hello World!\n";
+}

tests/CMakeLists.txt

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+add_subdirectory(unit)

tests/unit/CMakeLists.txt

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+find_package(GTest)
+
+if (${GTest_FOUND})
+include(GoogleTest)
+
+add_executable(base_test base.cc)
+target_link_libraries(base_test PRIVATE common_options)
+
+target_link_libraries(base_test PRIVATE
+  GTest::gtest
+  GTest::gtest_main
+)
+
+gtest_discover_tests(base_test)
+endif (${GTest_FOUND})

tests/unit/base.cc

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+#include <gtest/gtest.h>
+
+TEST(misc, passing) {
+    ASSERT_EQ(1, 1);
+}