Add CMake compatibility, cleanup/improve project structure

.gitignore

@@ -3,3 +3,6 @@ test-base64
 .wsjcpp/*
 *.o
 *.exe
+build/
+base64-test-11
+base64-test-17

CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.12)
+project("cpp-base64" LANGUAGES CXX VERSION 2.0.8
+  DESCRIPTION "Base64 encoding and decoding with C++"
+  HOMEPAGE_URL "https://github.com/CodeFinder2/cpp-base64")
+include(GNUInstallDirs)
+
+add_library(${PROJECT_NAME} src/base64.cpp)
+target_include_directories(${PROJECT_NAME} SYSTEM
+  PUBLIC $<BUILD_INTERFACE:${${PROJECT_NAME}_SOURCE_DIR}/include>
+         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+
+install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/${PROJECT_NAME} DESTINATION include)
+install(TARGETS ${PROJECT_NAME} EXPORT ${PROJECT_NAME}Config
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
+export(TARGETS ${PROJECT_NAME} FILE ${PROJECT_NAME}Config.cmake)

Makefile

@@ -27,23 +27,23 @@ WARNINGS=                    \
    -fdiagnostics-show-option
 
 test: base64-test-11 base64-test-17
-	base64-test-11
-	base64-test-17
+	-./base64-test-11
+	-./base64-test-17
 
 base64-test-11: base64-11.o test-11.o
 	g++ base64-11.o test-11.o -o $@
 
 base64-test-17: base64-17.o test-17.o
 	g++ base64-17.o test-17.o -o $@
 
-base64-11.o: base64.cpp base64.h
-	g++ -std=c++11 $(WARNINGS) -c base64.cpp -o base64-11.o
+base64-11.o: src/base64.cpp include/cpp-base64/base64.h
+	g++ -std=c++11 $(WARNINGS) -c src/base64.cpp -o base64-11.o -I include
 
-base64-17.o: base64.cpp base64.h
-	g++ -std=c++17 $(WARNINGS) -c base64.cpp -o base64-17.o
+base64-17.o: src/base64.cpp include/cpp-base64/base64.h
+	g++ -std=c++17 $(WARNINGS) -c src/base64.cpp -o base64-17.o -I include
 
-test-11.o: test.cpp
-	g++ -std=c++11 $(WARNINGS) -c test.cpp -o test-11.o
+test-11.o: test/test.cpp
+	g++ -std=c++11 $(WARNINGS) -c test/test.cpp -o test-11.o -I include
 
-test-17.o: test.cpp
-	g++ -std=c++17 $(WARNINGS) -c test.cpp -o test-17.o
+test-17.o: test/test.cpp
+	g++ -std=c++17 $(WARNINGS) -c test/test.cpp -o test-17.o -I include

compile-and-run-test

@@ -1,2 +1,2 @@
-g++ test.cpp base64.cpp -o test-base64
+g++ test/test.cpp src/base64.cpp -o test-base64 -I include
 ./test-base64

base64.cpp → src/base64.cpp

@@ -31,7 +31,7 @@
 
 */
 
-#include "base64.h"
+#include "cpp-base64/base64.h"
 
 #include <algorithm>
 #include <stdexcept>

measure-time.cpp → test/measure-time.cpp

@@ -1,4 +1,4 @@
-#include "base64.h"
+#include "../include/cpp-base64/base64.h"
 #include <iostream>
 #include <chrono>
 

test-google.cpp → test/test-google.cpp

@@ -1,4 +1,4 @@
-#include "base64.h"
+#include "../include/cpp-base64/base64.h"
 #include <iostream>
 
 #include <gtest/gtest.h>

test.cpp → test/test.cpp

@@ -1,4 +1,4 @@
-#include "base64.h"
+#include <cpp-base64/base64.h>
 #include <iostream>
 
 int main() {