add config support

includes/tomlc17-R260618/simple/Makefile

@@ -0,0 +1,59 @@
+EXEC = simple simplecpp
+
+# set up CFLAGS / CXXFLAGS
+CFLAGS = -std=c17 -Wmissing-declarations -Wall -Wextra -MMD 
+
+ifdef DEBUG
+    CFLAGS += -O0 -g -fsanitize=address,undefined
+else
+    CFLAGS += -O3 -DNDEBUG
+endif
+# Add -fpic only for non-Windows platforms
+ifneq ($(OS), Windows_NT)
+    CFLAGS += -fpic
+endif
+
+CXXFLAGS = $(subst -std=c17,-std=c++20,$(CFLAGS))
+
+# Test if C++ is available
+HAVE_CXX := $(shell command -v $(CXX) 2> /dev/null)
+
+# Test for C++20 support
+CXX20_SUPPORT := $(shell echo "int main(){}" | $(CXX) -std=c++20 -x c++ -c - -o /dev/null 2>/dev/null && echo yes || echo no)
+
+
+
+all: $(EXEC)
+
+simple: simple.c ../src/libtomlc17.a
+	$(CC) $(CFLAGS) -o $@ $@.c -L../src -ltomlc17
+
+repro: repro.c ../src/libtomlc17.a
+	$(CC) $(CFLAGS) -o $@ $@.c -L../src -ltomlc17
+
+
+simplecpp: simplecpp.cpp ../src/libtomlc17.a
+ifndef HAVE_CXX
+	@echo "INFO: skipping $@ because no $(CXX) compiler found"
+else ifeq ($(CXX20_SUPPORT),no)
+	@echo "INFO: skipping $@ because $(CXX) does not support C++20"
+else
+	$(CXX) $(CXXFLAGS) -o $@ $@.cpp -L ../src -l tomlc17
+endif
+
+-include simple.d simplecpp.d
+
+test: all
+	./simple > /dev/null
+	[ ! -x ./simplecpp ] || ./simplecpp > /dev/null
+
+clean:
+	rm -f *.o *.d *.a $(EXEC)
+
+distclean: clean
+
+format:
+	clang-format -i *.[ch] *.cpp
+
+.PHONY: all clean distclean format
+