Upgrade Makefile, fix warnings

.gitignore

@@ -5,3 +5,4 @@ compile_commands.commands.json
 compile_commands.json
 .clangd/
 .cache/
+/objects/

Makefile

@@ -1,17 +1,34 @@
-COMMON_CXXFLAGS = -Wall -Wextra -Wpedantic -std=c++20
+COMMON_CXXFLAGS = -Wall -Wextra -Wpedantic -std=c++20 \
+	-Wformat -Wformat=2 -Wconversion -Wimplicit-fallthrough \
+	-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=3 \
+	-D_GLIBCXX_ASSERTIONS \
+	-fstrict-flex-arrays=3 \
+	-fstack-clash-protection -fstack-protector-strong \
+	-Wl,-z,nodlopen -Wl,-z,noexecstack \
+	-Wl,-z,relro -Wl,-z,now
 ifdef DEBUG
 	CXXFLAGS = -Og -g ${COMMON_CXXFLAGS}
 else
-	CXXFLAGS = -O3 ${COMMON_CXXFLAGS}
+	CXXFLAGS = -O2 ${COMMON_CXXFLAGS}
 endif
 
+OBJDIR = objects
+
+SOURCES = src/main.cpp
+
+OBJECTS = $(addprefix ${OBJDIR}/,$(patsubst %.cpp,%.cpp.o,${SOURCES}))
+
 all: KoreanNumbers
 
-KoreanNumbers: src/main.o
+KoreanNumbers: ${OBJECTS}
 	$(CXX) $(CXXFLAGS) -o KoreanNumbers $^
 
+${OBJDIR}/%.cpp.o: %.cpp
+	@mkdir -p $(dir $@)
+	$(CXX) $(CXXFLAGS) -c -o $@ $<
+
 .PHONY:
 
 clean:
 	rm -f KoreanNumbers
-	rm -f src/*.o
+	rm -rf ${OBJDIR}

src/main.cpp

@@ -3,7 +3,6 @@
 #include <cstdlib>
 #include <random>
 #include <chrono>
-#include <memory>
 #include <string>
 #include <iostream>
 #include <algorithm>
@@ -60,7 +59,7 @@ void help() {
     puts("  [-l | --list] - list \"base\" numbers (can combine with --alt)");
 }
 
-const char8_t* digit_to_kword(int n) {
+const char8_t* digit_to_kword(unsigned long long n) {
     switch(n) {
     case 9:
         return gu;
@@ -252,7 +251,7 @@ void printValue(unsigned long long value) {
     unsigned char count = 0;
     while(temp > 0) {
         ++count;
-        s.push_back('0' + temp % 10);
+        s.push_back('0' + (char)(temp % 10));
         temp /= 10;
         if(count == 3 && temp > 0) {
             s.push_back(',');
@@ -280,13 +279,13 @@ unsigned long long clamp_digits(unsigned int digits, unsigned long long value) {
 }
 
 std::ostream& operator<<(std::ostream &os, const std::u8string &str) {
-    os.write(reinterpret_cast<const char*>(str.data()), str.size());
+    os.write(reinterpret_cast<const char*>(str.data()), (long)str.size());
     return os;
 }
 
 std::ostream& operator<<(std::ostream &os, const char8_t *str8) {
     const char *cstr = reinterpret_cast<const char*>(str8);
-    os.write(cstr, strlen(cstr));
+    os.write(cstr, (long)strlen(cstr));
     return os;
 }
 
@@ -401,7 +400,7 @@ int main(int argc, char **argv) {
 
     unsigned long long value;
     {
-        std::default_random_engine r_eng(std::chrono::steady_clock::now().time_since_epoch().count());
+        std::default_random_engine r_eng((unsigned long)std::chrono::steady_clock::now().time_since_epoch().count());
         if(!isAlt && randomizeDigits) {
             unsigned int min_digits = 0;
             for (unsigned long long min_copy = min; min_copy > 0; min_copy /= 10) {