add C proof of concept

1 files changed, 54 insertions, 0 deletions

diff --git a/experimental/Makefile b/experimental/Makefile
new file mode 100644
index 0000000..27d84c4
--- /dev/null
+++ b/experimental/Makefile
@@ -0,0 +1,54 @@
+# References:
+#    BUILD_DIR and per-.cpp file https://spin.atomicobject.com/2016/08/26/makefile-c-projects/
+#    https://bgstack15.ddns.net/blog/posts/2019/11/04/sample-makefile/ 2022-09-28-4 15:34
+awkbin     :=$(shell which awk)
+cpbin      :=$(shell which cp)
+echobin    :=$(shell which echo)
+findbin    :=$(shell which find)
+grepbin    :=$(shell which grep)
+installbin :=$(shell which install)
+rmbin      :=$(shell which rm)
+sedbin     :=$(shell which sed)
+sortbin    :=$(shell which sort)
+truebin    :=$(shell which true)
+
+CXX = g++
+CC = gcc
+
+# to get full debug symbols, add to both FLAGS: -g
+# to make all warnings act as errors: -Wall -Weffc++ -Wextra -Wsign-conversion -Werror
+CXXFLAGS = -g -std=c++17 -Wall -Weffc++ -Wextra -Wsign-conversion -Werror
+CCFLAGS = -g -Wall -Wextra -Wsign-conversion -Werror `pkg-config x11 --cflags`
+
+# to remove all debug symbols: -s
+# to add full debug symbols: -g
+LDFLAGS = -g `pkg-config x11 --libs`
+
+src = $(wildcard *.c)
+obj = $(src:.c=.o)
+
+BUILD_DIR ?= .
+
+OUTEXE = status
+
+all: $(OUTEXE)
+
+$(obj):
+
+$(BUILD_DIR)/%.o: %.c
+	$(CC) -c $(CCFLAGS) -o $@ $<
+
+# link
+$(OUTEXE): $(obj)
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+.PHONY: clean cleanall list
+
+list:
+	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | ${awkbin} -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | ${sortbin} | ${grepbin} -E -v -e '^[^[:alnum:]]' -e '^$@$$' -e '\.(cp*|o)'
+
+clean:
+	rm -f $(obj)
+
+cleanall:
+	rm -f $(obj) $(OUTEXE)