Add bobbl/punycc

Author: vacantron

Makefile

@@ -47,6 +47,7 @@ endif
 
 all:
 	$(Q)$(MAKE) -C src/asm-hello BUILD_DIR="$(BUILD_DIR)" RV32_EXT=$(RV32_EXT) OPT_LEVEL="$(OPT_LEVEL)" all
+	$(Q)$(MAKE) -C src/cc BUILD_DIR="$(BUILD_DIR)" RV32_EXT=$(RV32_EXT) OPT_LEVEL="$(OPT_LEVEL)" all
 	$(Q)$(MAKE) -C src/ansibench/nbench BUILD_DIR="$(BUILD_DIR)" RV32_EXT=$(RV32_EXT) OPT_LEVEL="$(OPT_LEVEL)" all
 
 include mk/common.mk

src/cc/Makefile

@@ -0,0 +1,54 @@
+RV32_EXT ?= rv32gc
+OPT_LEVEL ?= 0 1 2
+
+CURDIR := $(abspath $(dir $(lastword $(MAKEFILE_LIST))))
+SRC_DIR := $(CURDIR)
+
+CFLAGS := -std=c99
+
+# prevent lazy set
+ifeq ($(BUILD_DIR),)
+  BUILD_DIR := $(CURDIR)/build
+endif
+
+EXECUTABLES := cc.elf
+
+SHELL_HACK := $(shell mkdir -p $(foreach LEVEL,$(OPT_LEVEL),$(BUILD_DIR)/$(RV32_EXT)/O$(LEVEL)/cc))
+
+.PHONY: all clean build-O0 build-O1 build-O2
+
+ifneq ($(filter $(OPT_LEVEL), 0),)
+all: build-O0
+endif
+
+ifneq ($(filter $(OPT_LEVEL), 1),)
+all: build-O1
+endif
+
+ifneq ($(filter $(OPT_LEVEL), 2),)
+all: build-O2
+endif
+
+include ../../mk/common.mk
+include ../../mk/toolchain.mk
+
+build-O0: $(addprefix $(BUILD_DIR)/$(RV32_EXT)/O0/cc/,$(EXECUTABLES))
+
+$(BUILD_DIR)/$(RV32_EXT)/O0/cc/$(EXECUTABLES): $(SRC_DIR)/cc.c | build-toolchain
+	$(VECHO) "  RISCVCC\t$(patsubst $(abspath $(BUILD_DIR)/..)/%,%,$@)\n" 
+	$(Q)$(CROSS_COMPILE) -o $@ -O0 $(CFLAGS) $<
+
+build-O1: $(addprefix $(BUILD_DIR)/$(RV32_EXT)/O1/cc/,$(EXECUTABLES))
+
+$(BUILD_DIR)/$(RV32_EXT)/O1/cc/$(EXECUTABLES): $(SRC_DIR)/cc.c | build-toolchain
+	$(VECHO) "  RISCVCC\t$(patsubst $(abspath $(BUILD_DIR)/..)/%,%,$@)\n" 
+	$(Q)$(CROSS_COMPILE) -o $@ -O1 $(CFLAGS) $<
+
+build-O2: $(addprefix $(BUILD_DIR)/$(RV32_EXT)/O2/cc/,$(EXECUTABLES))
+
+$(BUILD_DIR)/$(RV32_EXT)/O2/cc/$(EXECUTABLES): $(SRC_DIR)/cc.c | build-toolchain
+	$(VECHO) "  RISCVCC\t$(patsubst $(abspath $(BUILD_DIR)/..)/%,%,$@)\n" 
+	$(Q)$(CROSS_COMPILE) -o $@ -O2 $(CFLAGS) $<
+
+clean:
+	$(RM) $(foreach LEVEL,$(OPT_LEVEL),$(BUILD_DIR)/$(RV32_EXT)/O$(LEVEL)/cc/*)

src/cc/README.md

@@ -20,11 +20,6 @@ Inspired by
   * [Compiler Construction](https://people.inf.ethz.ch/wirth/CompilerConstruction/index.html) -
     brief but comprehensive book by Niklaus Wirth.
 
-Run the following command under top-level directory.
-```shell
-tests/cc-selfhost.sh
-```
-
 ## Language restrictions
 
   * No linker.

src/cc/cc.c

@@ -44,6 +44,8 @@
  *   0Ah %                   7Dh }
  */
 
+#include "emit.c"
+
 /* Helper */
 
 /* helper to write a 32 bit number to a char array */

src/cc/emit.c

@@ -16,6 +16,8 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include "stdlib.c"
+
 /* constants */
 unsigned buf_size;