Working bot answering PING, and its C wrapper.

GNUmakefile

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+# Common
+prefix= /usr/local
+
+CC=clang
+CFLAGS= -Wall -Werror -Wextra
+#CFLAGS+= -std=c99
+CFLAGS+= -std=gnu99
+#CFLAGS+= -Os
+CFLAGS+= -g
+
+LDFLAGS= -lgnutls -lpthread -ldl -rdynamic
+LDFLAGS+= -g
+#LDFLAGS+= -Os
+
+# Target: cbot
+cbot_BIN= cbot
+cbot_OBJ= $(subst .c,.o,$(wildcard src/*.c))
+
+# Targets: plugins
+plugins_SO= $(subst .c,.so,$(wildcard src/plugin/*.c))
+
+# Rules
+all: $(cbot_BIN) $(plugins_SO)
+
+$(cbot_BIN): $(cbot_OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $(cbot_BIN) $(cbot_OBJ)
+
+%.so: %.c
+	$(CC) -shared -nostartfiles -fPIC $(CFLAGS) $*.c -o $*.so
+	$(CC) -MM $(CFLAGS) $*.c > $*.d
+	@mv -f $*.d $*.d.tmp
+	@sed -e 's|.*:|$*.o:|' < $*.d.tmp > $*.d
+	@sed -e 's/.*://' -e 's/\\$$//' < $*.d.tmp | fmt -1 | sed -e 's/^ *//' -e 's/$$/:/' >> $*.d
+	@rm -f $*.d.tmp
+
+-include $(cbot_OBJ:.o=.d)
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $*.c -o $*.o
+	$(CC) -MM $(CFLAGS) $*.c > $*.d
+	@mv -f $*.d $*.d.tmp
+	@sed -e 's|.*:|$*.o:|' < $*.d.tmp > $*.d
+	@sed -e 's/.*://' -e 's/\\$$//' < $*.d.tmp | fmt -1 | sed -e 's/^ *//' -e 's/$$/:/' >> $*.d
+	@rm -f $*.d.tmp
+
+clean:
+	$(RM) */*.o */*.d */*/*.o */*/*.d */*/*.so
+	$(RM) $(cbot_BIN) AllTests
+	$(RM) -rf clang-analyzer
+
+check:
+	scan-build -o clang-analyzer make
+	clang -o AllTests $(wildcard tests/*.c)
+	./AllTests
+
+tags:
+	ctags -o .tags -a $(wildcard src/*.[hc])
+
+.PHONY: all clean install uninstall tags
+
+start:
+	./cbot