abacus: bootstrap build system

tests/unit/base.cc

@@ -0,0 +1,5 @@
+#include <gtest/gtest.h>
+
+TEST(misc, passing) {
+    ASSERT_EQ(1, 1);
+}

tests/unit/meson.build

@@ -0,0 +1,25 @@
+gtest = dependency(
+  'gtest',
+  main: true,
+  required: false,
+)
+
+if gtest.found()
+  unit_test_sources = files(
+    'base.cc',
+  )
+
+  unit_tests = executable(
+    'unit_tests',
+    sources: unit_test_sources,
+    dependencies: [
+      gtest,
+    ],
+  )
+
+  test(
+    'unit tests',
+    unit_tests,
+    protocol: 'gtest',
+  )
+endif