Setup project structure for unified Makefile

src/precomp.hpp

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+// C++98 (first official C++ standard)
+#include <algorithm>
+#include <bitset>
+#include <cassert>
+#include <cctype>
+#include <cerrno>
+#include <climits>
+#include <cmath>
+#include <complex>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <cwchar>
+#include <cwctype>
+#include <deque>
+#include <exception>
+#include <fstream>
+#include <functional>
+#include <iomanip>
+#include <ios>
+#include <iosfwd>
+#include <iostream>
+#include <istream>
+#include <iterator>
+#include <limits>
+#include <list>
+#include <locale>
+#include <map>
+#include <memory>
+#include <new>
+#include <numeric>
+#include <ostream>
+#include <queue>
+#include <set>
+#include <sstream>
+#include <stack>
+#include <stdexcept>
+#include <streambuf>
+#include <string>
+#include <typeinfo>
+#include <utility>
+#include <valarray>
+#include <vector>
+
+#if (__cplusplus >= 201103L) // C++11
+#include <array>
+#include <atomic>
+#include <cfenv>
+#include <chrono>
+#include <cinttypes>
+#include <codecvt> // deprecated in C++17, removed in C++26
+#include <condition_variable>
+#include <cstdint>
+#include <cuchar>
+#include <forward_list>
+#include <future>
+#include <initializer_list>
+#include <mutex>
+#include <random>
+#include <ratio>
+#include <regex>
+#include <scoped_allocator>
+#include <system_error>
+#include <thread>
+#include <tuple>
+#include <type_traits>
+#include <typeindex>
+#include <unordered_map>
+#include <unordered_set>
+#endif // C++11
+
+#if (__cplusplus >= 201402L) // C++14
+#include <shared_mutex>
+#endif // C++14
+
+#if (__cplusplus >= 201703L) // C++17
+#include <any>
+#include <charconv>
+#include <execution>
+#include <filesystem>
+#include <memory_resource>
+#include <optional>
+#include <string_view>
+#include <variant>
+#endif // C++17
+
+#if (__cplusplus >= 202002L) // C++20
+#include <barrier>
+#include <bit>
+#include <compare>
+#include <concepts>
+#include <coroutine>
+#include <format>
+#include <latch>
+#include <numbers>
+#include <ranges>
+#include <semaphore>
+#include <source_location>
+#include <span>
+#include <stop_token>
+#include <syncstream>
+#include <version>
+#endif // C++20
+
+#if (__cplusplus >= 202302L) // C++23
+#include <expected>
+#include <flat_map>
+#include <flat_set>
+#include <generator>
+#include <mdspan>
+#include <print>
+#include <spanstream>
+#include <stacktrace>
+#include <stdfloat>
+#endif // C++23
+
+#if (__cplusplus > 202302L) // C++26
+#include <debugging>
+#include <hazard_pointer>
+#include <inplace_vector>
+#include <linalg>
+#include <rcu>
+#include <text_encoding>
+#endif // C++26

src/version.cpp

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+#include "version.hpp"
+#include "version.inc"
+#include "commit.inc"
+#include <sstream>
+
+std::string {PROJECT}_version() {
+    std::ostringstream oss;
+    oss << "{PROJECT} version " << version;
+#ifdef DEBUG
+    oss << " DEBUG";
+#endif
+    oss << '\n';
+    if (commit[0] != '\0') {
+        oss << "build " << commit << ", ";
+    }
+    oss << __DATE__ << ", " << __TIME__ << '\n';
+    oss << "(c) Bob Polis, all rights reserved";
+    return oss.str();
+}

src/version.hpp

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+#ifndef VERSION_H_
+#define VERSION_H_
+
+#include <string>
+
+std::string {PROJECT}_version();
+
+#endif // VERSION_H_

tests/Makefile

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+../Makefile

tests/postmake.make

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+$(BUILDDIR)/%.o: ../src/%.cpp
+ifeq ($(PRECOMPILE), 1)
+	$(CXX) $(CXXFLAGS) -o $@ -include precomp.hpp -MMD -MP -MT $@ -MF $(BUILDDIR)/$*.dep -c $<
+else
+	$(CXX) $(CXXFLAGS) -o $@ -MMD -MP -MT $@ -MF $(BUILDDIR)/$*.dep -c $<
+endif

tests/premake.make

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+include ../premake.make
+LDLIBS += -lboost_unit_test_framework
+CXXFLAGS += -I../src
+SRCS := $(notdir $(filter-out ../src/main.cpp,$(wildcard ../src/*.cpp)))
+PRODUCT := tool

tests/src/main.cpp

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+#define BOOST_TEST_MODULE My Test
+#define BOOST_TEST_DYN_LINK
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_CASE(first_test)
+{
+    BOOST_TEST(1 == 1);
+}

tests/src/precomp.hpp

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+../../src/precomp.hpp