diff --git a/Makefile b/Makefile
index 97036c8..032d08b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,46 +1,294 @@
-BIN := ranlin
+include premake.make
 
-SRCS := main.cpp
-OBJS := $(subst .cpp,.o,$(SRCS))
-DEPS := $(subst .cpp,.d,$(SRCS))
-
-CXX ?= g++
-PKG_CONFIG ?= pkg-config
+# git commit hash and version for this build
+COMMIT-HASH != git log 2>/dev/null | sed -e '1s/^commit //;q'
+COMMIT := "static const char* commit = \"$(COMMIT-HASH)\";"
+VERSION := "static const char* version = \"$(MAJOR).$(MINOR).$(PATCH)\";"
 
+# some important install locations
 PREFIX ?= /usr/local
-BINDIR ?= ${PREFIX}/bin
-DATADIR ?= ${PREFIX}/share
-MANDIR ?= ${DATADIR}/man
+BINDIR ?= $(PREFIX)/bin
+CONFIGDIR ?= $(PREFIX)/etc
+INCLUDEDIR ?= $(PREFIX)/include
+LIBDIR ?= $(PREFIX)/lib
+MANDIR ?= $(PREFIX)/man
+DATADIR ?= $(PREFIX)/share/$(PROJ)
+DOCDIR ?= $(DATADIR)/doc
 
-RM := /bin/rm -f
-INSTALL := /usr/bin/install -c
+# setup naming and versioning for library product
+ifeq ($(UNAME_S), Darwin)
+	LINKERNAME := $(PROJ).dylib
+	SONAME := $(PROJ).$(MAJOR).dylib
+	REALNAME := $(LINKERNAME)
+else ifeq ($(UNAME_S), OpenBSD)
+	REALNAME := $(PROJ).so.$(MAJOR).$(MINOR)
+else ifeq ($(UNAME_S), Linux)
+	LINKERNAME := $(PROJ).so
+	SONAME := $(LINKERNAME).$(MAJOR)
+	REALNAME := $(SONAME).$(MINOR).$(PATCH)
+endif
+STATICLIB := $(PROJ).a
 
-CXXFLAGS := ${CXXFLAGS} -Wshadow -Wall -Wpedantic -Wextra -g -std=c++14
-ifeq ($(DEBUG),1)
-	CXXFLAGS += -D DEBUG -O0
+# select default compiler
+CXX ?= g++
+
+# setup compiler flags and build config
+CXXFLAGS += -Wshadow -Wall -Wpedantic -Wextra -Wno-unused-parameter
+CXXFLAGS += -g3 -fPIC
+ifeq ($(DEBUG), 1)
+	CXXFLAGS += -DDEBUG -O0
+	CONFIG := debug
 else
-	CXXFLAGS += -O3
+	CXXFLAGS += -DNDEBUG -O3
+	CONFIG := release
 endif
 
-LDLIBS := -lm -lpthread
-LDFLAGS :=
+# setup build locations
+OUTDIR := build/$(CONFIG)
+BUILDDIR := build/obj
+BIN := $(OUTDIR)/$(PROJ)
 
-all: $(BIN)
+# define sources and derived files
+# allow for extra sources defined in premake.make
+SRCS += $(notdir $(wildcard src/*.cpp))
+OBJS := $(addprefix $(BUILDDIR)/, $(SRCS:.cpp=.o))
+DEPS := $(addprefix $(BUILDDIR)/, $(SRCS:.cpp=.dep))
+HDRS ?= $(filter-out src/precomp.hpp, $(wildcard src/*.hpp))
+MANS := $(addprefix $(PREFIX)/, $(wildcard man/man*/*))
 
-$(BIN): $(OBJS) $(DEPS)
-	$(CXX) $(OBJS) $(LDFLAGS) -o $(BIN) $(LDLIBS)
+# if project supports plugins, link to libdl where needed
+ifdef PLUGINS
+ifeq ($(UNAME_S),Darwin)
+	LDLIBS += -ldl
+else ifeq ($(UNAME_S),Linux)
+	LDLIBS += -ldl
+endif
+endif
 
-%.o: %.cpp %.d Makefile
-	$(CXX) $(CXXFLAGS) -MMD -MP -MT $@ -MF $*.d -c $<
+# pattern rules ===========================================================
 
--include *.d
+$(BUILDDIR)/%.o: src/%.cpp
+ifeq ($(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
 
-%.d: ;
+%.dep: ;
 
-.PHONY: clean install
+$(MANDIR)/man1/%: man/man1/%
+	install -m 0644 $< $@
+
+$(MANDIR)/man3/%: man/man3/%
+	install -m 0644 $< $@
+
+$(MANDIR)/man5/%: man/man5/%
+	install -m 0644 $< $@
+
+# =========================================================== pattern rules
+
+# targets =================================================================
+
+.PHONY: all commit-hash version plugins test clean dist-clean install-plugins \
+install install-data uninstall-data uninstall-plugins uninstall
+
+# main target
+ifeq ($(PRODUCT), tool)
+all: $(BUILDDIR) $(OUTDIR) commit-hash version plugins $(BIN)
+else ifeq ($(PRODUCT), lib)
+all: $(BUILDDIR) $(OUTDIR) commit-hash version plugins $(OUTDIR)/$(REALNAME) $(OUTDIR)/$(STATICLIB)
+endif
+
+$(BUILDDIR):
+	mkdir -p $@
+
+$(OUTDIR):
+	mkdir -p $@
+
+# product build rules
+ifeq ($(PRODUCT), tool) # -------------------------------------------- tool
+
+ifeq ($(PRECOMPILE), 1)
+$(BIN): precomp.hpp.gch $(OBJS)
+else
+$(BIN): $(OBJS)
+endif
+	$(CXX) -o $(BIN) $(LDFLAGS) $(OBJS) $(LDLIBS)
+	@ln -sf $(BIN) $(PROJ)
+
+endif # -------------------------------------------------------------- tool
+
+ifeq ($(PRODUCT), lib) # ---------------------------------------------- lib
+
+ifeq ($(PRECOMPILE), 1)
+$(OUTDIR)/$(REALNAME): precomp.hpp.gch $(OBJS)
+else
+$(OUTDIR)/$(REALNAME): $(OBJS)
+endif
+ifeq ($(UNAME_S),Darwin)
+	$(CXX) -dynamiclib -o $(OUTDIR)/$(REALNAME) -install_name $(LIBDIR)/$(REALNAME) \
+-current_version $(MAJOR) -compatibility_version $(MINOR) $(LDFLAGS) $(OBJS) $(LDLIBS)
+else ifeq ($(UNAME_S),OpenBSD)
+	$(CXX) -g -shared -Wl,-soname,$(REALNAME) -o $(OUTDIR)/$(REALNAME) $(LDFLAGS) $(OBJS) $(LDLIBS)
+else ifeq ($(UNAME_S),Linux)
+	$(CXX) -g -shared -Wl,-soname,$(SONAME) -o $(OUTDIR)/$(REALNAME) $(LDFLAGS) $(OBJS) $(LDLIBS)
+endif
+
+$(OUTDIR)/$(STATICLIB): $(OBJS)
+	ar r $(OUTDIR)/$(STATICLIB) $(OBJS)
+
+ifeq ($(GENERATELIBHEADER),1)
+$(OUTDIR)/$(PROJ).hpp: $(HDRS)
+	@echo updating $(OUTDIR)/$(PROJ).hpp
+	@cp /dev/null $(OUTDIR)/$(PROJ).hpp
+	@for h in $(HDRS); \
+	do \
+		sed '/@exclude/d' $$h >> $(OUTDIR)/$(PROJ).hpp; \
+	done
+endif
+
+endif # --------------------------------------------------------------- lib
+
+# get generated dependencies, if any
+-include $(DEPS)
+
+commit-hash:
+	@if ! echo $(COMMIT) | diff -q src/commit.inc - >/dev/null 2>&1 ;\
+	then \
+		echo $(COMMIT) > src/commit.inc ;\
+	fi
+
+version:
+	@if ! echo $(VERSION) | diff -q src/version.inc - >/dev/null 2>&1 ;\
+	then \
+		echo $(VERSION) > src/version.inc ;\
+	fi
+
+$(BUILDDIR)/version.o: src/version.inc src/commit.inc
+
+precomp.hpp.gch: src/precomp.hpp
+	$(CXX) $< $(CXXFLAGS) -o $@
+
+plugins:
+ifdef PLUGINS
+	@for plug in $(PLUGINS) ;\
+	do \
+		$(MAKE) -C $$plug ;\
+	done
+endif
+
+test:
+	$(MAKE) -C tests && tests/tests
 
 clean:
-	$(RM) $(OBJS) $(DEPS) $(BIN)
+	rm -rf $(BUILDDIR) tests/build tests/tests tests/src/commit.inc tests/src/version.inc
+ifdef PLUGINS
+	@for plug in $(PLUGINS) ;\
+	do \
+		$(MAKE) -C $$plug clean ;\
+	done
+endif
 
-install: $(BIN)
-	$(INSTALL) $(BIN) $(DESTDIR)$(BINDIR)
+dist-clean: clean
+	rm -rf build $(PROJ) src/commit.inc src/version.inc precomp.hpp.gch
+
+$(MANDIR)/man1:
+	install -m 0755 -d $@
+
+$(MANDIR)/man3:
+	install -m 0755 -d $@
+
+$(MANDIR)/man5:
+	install -m 0755 -d $@
+
+$(DATADIR):
+	install -m 0755 -d $@
+
+# (un)install targets
+
+ifdef DATAFILES
+install-data: $(DATADIR)
+	install -m 0644 $(DATAFILES) $(DATADIR)
+else
+install-data:
+endif
+
+uninstall-data:
+	rm -rf $(DATADIR)
+
+install-plugins:
+ifdef PLUGINS
+	@for plug in $(PLUGINS) ;\
+	do \
+		$(MAKE) -C $$plug install ;\
+	done
+endif
+
+uninstall-plugins:
+ifdef PLUGINS
+	@for plug in $(PLUGINS) ;\
+	do \
+		$(MAKE) -C $$plug uninstall ;\
+	done
+endif
+
+ifeq ($(PRODUCT), tool) # -------------------------------------------- tool
+
+$(BINDIR):
+	install -m 0755 -d $@
+
+install: $(MANDIR)/man1 $(MANDIR)/man3 $(MANDIR)/man5 $(BINDIR) $(MANS) install-data install-plugins
+	install -m 0755 $(BIN) $(BINDIR)
+
+uninstall: uninstall-data uninstall-plugins
+	rm -f $(BINDIR)/$(PROJ) $(MANS)
+
+endif # -------------------------------------------------------------- tool
+
+ifeq ($(PRODUCT), lib) # ---------------------------------------------- lib
+
+$(LIBDIR):
+	install -m 0755 -d $@
+
+$(INCLUDEDIR):
+	install -m 0755 -d $@
+
+$(INCLUDEDIR)/$(PROJ):
+	install -m 0755 -d $@
+
+ifeq ($(GENERATELIBHEADER), 1)
+install: $(MANDIR)/man1 $(MANDIR)/man3 $(MANDIR)/man5 $(LIBDIR) $(INCLUDEDIR) $(MANS) $(OUTDIR)/$(PROJ).hpp install-data install-plugins
+	install -m 0644 $(OUTDIR)/$(PROJ).hpp $(INCLUDEDIR)
+else
+install: $(MANDIR)/man1 $(MANDIR)/man3 $(MANDIR)/man5 $(LIBDIR) $(INCLUDEDIR) $(MANS) $(INCLUDEDIR)/$(PROJ) install-data install-plugins
+	install -m 0644 $(HDRS) $(INCLUDEDIR)/$(PROJ)
+endif
+	install -m 0644 $(OUTDIR)/$(REALNAME) $(LIBDIR)
+	install -m 0644 $(OUTDIR)/$(STATICLIB) $(LIBDIR)
+ifeq ($(UNAME_S), Darwin)
+	cd $(LIBDIR) && ln -sf $(REALNAME) $(SONAME)
+else ifeq ($(UNAME_S), Linux)
+ifeq ($(USER), root)
+	ldconfig
+else
+	cd $(LIBDIR) && ln -sf $(REALNAME) $(SONAME)
+endif
+	cd $(LIBDIR) && ln -sf $(SONAME) $(LINKERNAME)
+else ifeq ($(UNAME_S), OpenBSD)
+	ldconfig -R
+endif
+
+uninstall: uninstall-data uninstall-plugins
+	rm -rf $(INCLUDEDIR)/$(PROJ).hpp $(INCLUDEDIR)/$(PROJ) $(MANS) $(LIBDIR)/$(STATICLIB) $(LIBDIR)/$(REALNAME) $(LIBDIR)/$(SONAME) $(LIBDIR)/$(LINKERNAME)
+ifeq ($(UNAME_S), Linux)
+	ldconfig
+else ifeq ($(UNAME_S), OpenBSD)
+	ldconfig -R
+endif
+
+endif # --------------------------------------------------------------- lib
+
+# ================================================================= targets
+
+# project-specific targets go in here
+-include postmake.make
diff --git a/main.cpp b/main.cpp
deleted file mode 100644
index 87fd02e..0000000
--- a/main.cpp
+++ /dev/null
@@ -1,36 +0,0 @@
-#include <iostream>
-#include <fstream>
-#include <string>
-#include <random>
-using namespace std;
-
-double next_random() {
-    static random_device dev;
-    static default_random_engine engine {dev()};
-    static uniform_real_distribution<double> dist {0, 1};
-    return dist(engine);
-}
-
-string random_line_from_file(istream& file) {
-    // This function selects a line from a file by reading
-    // the file line by line, so the file is never in memory
-    // as a whole. Still, the chance a line is being picked
-    // is equal for every line.
-    string line;
-    string result;
-    for (int nr = 1; getline(file, line); ++nr) {
-        if (next_random() * nr < 1.0) {
-            result = line;
-        }
-    }
-    return result;
-}
-
-int main(int argc, const char * argv[]) {
-    if (argc > 1) {
-        ifstream infile {argv[1]};
-        cout << random_line_from_file(infile) << '\n';
-    } else {
-        cout << random_line_from_file(cin) << '\n';
-    }
-}
diff --git a/man/man1/ranlin.1 b/man/man1/ranlin.1
new file mode 100644
index 0000000..c750237
--- /dev/null
+++ b/man/man1/ranlin.1
@@ -0,0 +1,59 @@
+.Dd $Mdocdate$
+.Dt ranlin 1
+.Os
+.Sh NAME
+.Nm ranlin
+.Nd one line about what it does
+.\" .Sh LIBRARY
+.\" For sections 2, 3, and 9	only.
+.\" Not used in OpenBSD.
+.Sh SYNOPSIS
+.Nm
+.Fl h
+.Nm
+.Fl \-version
+.Nm
+.Op Ar
+.Sh DESCRIPTION
+The
+.Nm
+utility processes files ...
+When no file arguments are given,
+.Nm
+will read from the standard input.
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl h, \-help
+Print help text and exit.
+.It Fl \-version
+Print version info and exit.
+.El
+.\" .Sh CONTEXT
+.\" For section 9 functions only.
+.\" .Sh IMPLEMENTATION NOTES
+.\" Not used in OpenBSD.
+.\" .Sh RETURN VALUES
+.\" For sections 2, 3, and 9 function return values only.
+.\" .Sh ENVIRONMENT
+.\" For sections 1, 6, 7, and 8 only.
+.\" .Sh FILES
+.Sh EXIT STATUS
+.\" For sections 1, 6, and 8 only.
+.Nm
+exits 0 on success, and 1 if an error occurs.
+.\" .Sh EXAMPLES
+.\" .Sh DIAGNOSTICS
+.\" For sections 1, 4, 6, 7, 8, and 9 printf/stderr messages only.
+.\" .Sh ERRORS
+.\" For sections 2, 3, 4, and 9 errno settings only.
+.\" .Sh SEE ALSO
+.\" .Xr foobar 1
+.\" .Sh STANDARDS
+.\" .Sh HISTORY
+.Sh AUTHORS
+Bob Polis
+.\" .Sh CAVEATS
+.\" .Sh BUGS
+.\" .Sh SECURITY CONSIDERATIONS
+.\" Not used in OpenBSD.
diff --git a/premake.make b/premake.make
new file mode 100644
index 0000000..d19c553
--- /dev/null
+++ b/premake.make
@@ -0,0 +1,31 @@
+# Define linker flags here, like: -lsqlite3 -lpthread
+LDLIBS :=
+
+# Dir name becomes product name.
+PROJ := $(shell basename $$(pwd))
+
+# Find out what platform we're on, e.g. Darwin, Linux, OpenBSD.
+UNAME_S := $(shell uname -s)
+
+# We will build a tool, not a library.
+PRODUCT := tool
+
+# Single source of truth for version.
+MAJOR := 1
+MINOR := 0
+PATCH := 1
+
+# Specify desired C++ standard for this project.
+CXXFLAGS += -std=c++20
+
+# Set to 1 if you want a precompiled header for the C++ Standard Library.
+PRECOMPILE := 0
+
+# List of extra files to be installed in DATADIR (/usr/local/share/$(PROJ) by default)
+DATAFILES :=
+
+# Define plugin sub-projects here. Assumption here is a directory "plugins"
+# containing plugin sub-projects, each in its own directory.
+# Rename and/or repeat accordingly.
+PLUGINS := $(wildcard plugins/*)
+MAKE += --no-print-directory
diff --git a/src/commit.inc b/src/commit.inc
new file mode 100644
index 0000000..c080060
--- /dev/null
+++ b/src/commit.inc
@@ -0,0 +1 @@
+static const char* commit = "be5f03a64e7d0d27a88d6f341a8beff8ad788fc9";
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..41b5131
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,84 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <random>
+#include <cstdlib>
+#include <stdexcept>
+#include <getopt.h>
+#include "version.hpp"
+using namespace std;
+
+static double next_random() {
+    static random_device dev;
+    static default_random_engine engine {dev()};
+    static uniform_real_distribution<double> dist {0, 1};
+    return dist(engine);
+}
+
+static string random_line_from_file(istream& file) {
+    // This function selects a line from a file by reading
+    // the file line by line, so the file is never in memory
+    // as a whole. Still, the chance a line is being picked
+    // is equal for every line.
+    string line;
+    string result;
+    for (int nr = 1; getline(file, line); ++nr) {
+        if (next_random() * nr < 1.0) {
+            result = line;
+        }
+    }
+    return result;
+}
+
+static void print_help() {
+    cout << "usage: ranlin [-h|--version]\n";
+    cout << "  -h, --help    show this help text and exit\n";
+    cout << "  --version     show version number and exit\n";
+}
+
+int main(int argc, char* argv[]) {
+    try {
+        int opt_char, opt_val;
+        struct option long_options[] = {
+            {"help", no_argument, nullptr, 'h'},
+            {"version", no_argument, &opt_val, 1},
+            {nullptr, 0, nullptr, 0}
+        };
+        while ((opt_char = getopt_long(argc, argv, "h", long_options, nullptr)) != -1) {
+            string arg {optarg ? optarg : ""};
+            switch (opt_char) {
+                case 0: {
+                    // handle long-only options here
+                    switch (opt_val) {
+                        case 1:
+                            cout << ranlin_version() << endl;
+                            return EXIT_SUCCESS;
+                    }
+                    break;
+                }
+                case 'h':
+                    print_help();
+                    return EXIT_SUCCESS;
+                case '?':
+                    throw runtime_error("unrecognized option");
+            }
+        }
+        if (optind == argc) {
+            // here when no file args
+            cout << random_line_from_file(cin) << '\n';
+        }
+        for (int i = optind; i < argc; ++i) {
+            try {
+                // process file argv[i]
+                ifstream infile {argv[1]};
+                cout << random_line_from_file(infile) << '\n';
+            } catch (const runtime_error& ex) {
+                cerr << "ranlin: " << ex.what() << '\n';
+            }
+        }
+    } catch (const exception& ex) {
+        cerr << "ranlin: " << ex.what() << '\n';
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
diff --git a/src/precomp.hpp b/src/precomp.hpp
new file mode 100644
index 0000000..182bcb4
--- /dev/null
+++ b/src/precomp.hpp
@@ -0,0 +1,127 @@
+// 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> not yet supported by clang 16
+//#include <syncstream> not yet supported by clang 17
+#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
diff --git a/src/version.cpp b/src/version.cpp
new file mode 100644
index 0000000..288968a
--- /dev/null
+++ b/src/version.cpp
@@ -0,0 +1,19 @@
+#include "version.hpp"
+#include <sstream>
+
+std::string ranlin_version() {
+#include "version.inc"
+#include "commit.inc"
+    std::ostringstream oss;
+    oss << "ranlin 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();
+}
diff --git a/src/version.hpp b/src/version.hpp
new file mode 100644
index 0000000..a6afc3b
--- /dev/null
+++ b/src/version.hpp
@@ -0,0 +1,8 @@
+#ifndef _RANLIN_VERSION_H_
+#define _RANLIN_VERSION_H_
+
+#include <string>
+
+std::string ranlin_version();
+
+#endif // _RANLIN_VERSION_H_
diff --git a/src/version.inc b/src/version.inc
new file mode 100644
index 0000000..2558059
--- /dev/null
+++ b/src/version.inc
@@ -0,0 +1 @@
+static const char* version = "1.0.1";
diff --git a/tests/Makefile b/tests/Makefile
new file mode 120000
index 0000000..d0b0e8e
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1 @@
+../Makefile
\ No newline at end of file
diff --git a/tests/postmake.make b/tests/postmake.make
new file mode 100644
index 0000000..39e713a
--- /dev/null
+++ b/tests/postmake.make
@@ -0,0 +1,6 @@
+$(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
diff --git a/tests/premake.make b/tests/premake.make
new file mode 100644
index 0000000..d5cfa47
--- /dev/null
+++ b/tests/premake.make
@@ -0,0 +1,5 @@
+include ../premake.make
+LDLIBS += -lboost_unit_test_framework
+CXXFLAGS += -I../src
+SRCS := $(notdir $(filter-out ../src/main.cpp,$(wildcard ../src/*.cpp)))
+PRODUCT := tool
diff --git a/tests/src/main.cpp b/tests/src/main.cpp
new file mode 100644
index 0000000..533ab2a
--- /dev/null
+++ b/tests/src/main.cpp
@@ -0,0 +1,8 @@
+#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);
+}
diff --git a/tests/src/precomp.hpp b/tests/src/precomp.hpp
new file mode 120000
index 0000000..821bca7
--- /dev/null
+++ b/tests/src/precomp.hpp
@@ -0,0 +1 @@
+../../src/precomp.hpp
\ No newline at end of file