refactor: set up for self-host testing

.gitignore

@@ -16,13 +16,15 @@ tmp*
 *.vsix
 
 # for debug
-test
+.vscode/
+tests
 ext
-test.*
+test.s
 ext.*
 .gdb_history
 
 # stages
 stage1/
 stage2/
 stage3/
+Makefile

Makefile

@@ -19,20 +19,12 @@ lint:
 	clang-format -i ./*.c
 	clang-format -i ./*.h
 
-lintx:
-	docker run --platform=linux/amd64 -v "${PWD}:/src" -w/src ccc make lint
-
 test: ccc
-	./ccc tests > tmp.s
-	echo 'int char_fn() { return 257; }' | gcc -xc -c -o tmp2.o -
-	echo 'int ext1 = 5; int *ext2 = &ext1;' | gcc -xc -c -o tmp3.o -
-	echo 'int ext_fn1(int x) { return x; }; int ext_fn2(int x) { return x;}' | gcc -xc -c -o tmp4.o -
-	gcc -static -o tmp tmp.s tmp2.o tmp3.o tmp4.o
+	./ccc test/test.c > tmp.s
+	cat test/helper.c | gcc -xc -c -o tmp2.o -
+	gcc -static -o tmp tmp.s tmp2.o
 	./tmp
 
-testx:
-	docker run --platform=linux/amd64 -v "${PWD}:/src" -w/src ccc make test
-
 clean:
 	rm -f ccc *.o *~ tmp* stage*/*
 
@@ -43,25 +35,42 @@ clean:
 # stage2: ccc on X86-64 machine generated by stage1
 # stage3: ccc on X86-64 machine generated by stage2
 
-STAGES = stage1 stage2 stage3
-
-define PROCESS_STAGE_RULE
-$(1)/%.c: %.c
-	mkdir -p $(1)
-	gcc -E -P $$< -o $$@
-endef
-
-$(foreach stage,$(STAGES),$(eval $(call PROCESS_STAGE_RULE,$(stage))))
-
-PROCESSED_SRCS = $(foreach stage,$(STAGES),$(addprefix $(stage)/,$(SRCS)))
-
-process: $(PROCESSED_SRCS)
-
 ccc-stage1: $(OBJS)
-	$(CC) -o $@ $(OBJS) $(CFLAGS)
-
-ccc-stage2:
-	@echo TODO
-
-ccc-stage3:
-	@echo TODO
+	@rm -rf stage1
+	@mkdir stage1
+	$(CC) -o stage1/$@ $(OBJS) $(CFLAGS)
+
+ccc-stage2: ccc-stage1 $(SRCS)
+	@rm -rf stage2
+	@mkdir stage2
+	$(CC) -D__ccc_self__ -E -P codegen.c -o stage2/codegen.c
+	$(CC) -D__ccc_self__ -E -P main.c -o stage2/main.c
+	$(CC) -D__ccc_self__ -E -P parse.c -o stage2/parse.c
+	$(CC) -D__ccc_self__ -E -P tokenize.c -o stage2/tokenize.c
+	$(CC) -D__ccc_self__ -E -P type.c -o stage2/type.c
+	stage1/ccc-stage1 stage2/codegen.c > stage2/codegen.s
+	stage1/ccc-stage1 stage2/main.c > stage2/main.s
+	stage1/ccc-stage1 stage2/parse.c > stage2/parse.s
+	stage1/ccc-stage1 stage2/tokenize.c > stage2/tokenize.s
+	stage1/ccc-stage1 stage2/type.c > stage2/type.s
+	$(CC) -o stage2/$@
+
+ccc-stage3: ccc-stage2 $(SRCS)
+	@rm -rf stage3
+	@mkdir stage3
+	$(CC) -D__ccc_self__ -E -P type.c -o stage3/type.c
+	$(CC) -D__ccc_self__ -E -P codegen.c -o stage3/codegen.c
+	$(CC) -D__ccc_self__ -E -P main.c -o stage3/main.c
+	$(CC) -D__ccc_self__ -E -P parse.c -o stage3/parse.c
+	$(CC) -D__ccc_self__ -E -P tokenize.c -o stage3/tokenize.c
+	stage2/ccc-stage2 stage3/codegen.c > stage3/codegen.s
+	stage2/ccc-stage2 stage3/main.c > stage3/main.s
+	stage2/ccc-stage2 stage3/parse.c > stage3/parse.s
+	stage2/ccc-stage2 stage3/tokenize.c > stage3/tokenize.s
+	stage2/ccc-stage2 stage3/type.c > stage3/type.s
+	$(CC) -o stage3/$@
+
+test-self-host: ccc-stage1 ccc-stage2 ccc-stage3
+	strip stage2/ccc-stage2
+	strip stage3/ccc-stage3
+	diff -s stage2/ccc-stage2 stage3/ccc-stage3

ccc.h

@@ -1,3 +1,64 @@
+#ifdef __ccc_self__
+
+typedef int bool;
+typedef int size_t;
+typedef void FILE;
+typedef void *va_list;
+
+#define SEEK_SET 0
+#define SEEK_END 2
+
+struct _reent {
+  int _errno;
+  void *_stdin;
+  void *_stdout;
+  void *_stderr;
+};
+
+extern struct _reent *_impure_ptr;
+
+#define stdin (_impure_ptr->_stdin)
+#define stderr (_impure_ptr->_stderr)
+
+extern int errno;
+
+#define __attribute__(x)
+#define noreturn
+
+#define NULL (0)
+#define true (1)
+#define false (0)
+#define static
+
+#define assert(x) 1
+
+int printf();
+int fopen();
+int strncmp();
+int strlen();
+int fprintf();
+char *strerror();
+int vsnprintf();
+int vfprintf();
+void *calloc();
+int isalnum();
+int isspace();
+int snprintf();
+int strstr();
+int strchr();
+int isdigit();
+int strtol();
+void exit();
+int fseek();
+int ftell();
+int fread();
+int fclose();
+int realloc();
+int ferror();
+int feof();
+
+#else
+
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
@@ -7,6 +68,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+
+#endif
 typedef struct Type Type;
 typedef struct Member Member;
 typedef struct Initializer Initializer;