[Vm-dev] Squeak VM port to Google Native Client

[Yoshiki Ohshima]

At Mon, 29 Aug 2011 11:22:03 -0300,
Javier Pimás wrote:
> 
> Hi Yoshiki, we are starting to work on this, and maybe you can help us. I wanted to know what setup did you use for the tools, and what workflow you follow. Some
> questions I can think of now:
> 
> - do you download your git repo over the squeak-svn?
> - do you generate the code for unix and then modify by hand or you generate for a new platform?
> - Is there any image code?

  Hi Javier!

  Last time I touched it was early May, and so much has changed in the
Native Client SDK since then.  It was SDK 0.2 and now it is 0.5.  Good
news is that they claim that API is now stabilizing (which should be
somewhat different from 0.2), so now we can have a bit more stable
version of VM, presumably.

  - My git repo was basically "on its own"; Into an empty git
    repository, I copied files (one file by one file) from squeak-svn
    and edit them as needed.  (So, that was the discussion you quoted;
    I still think many files can be reused with a bit more ifdefs in
    the Unix code.)

  - The annoying kind of generated files, such as config.h, were
    indeed hand edited.

  - There is no code for image side yet.  A bridge to Pepper API is
    called for, however.

> also, I'm seeing that you use a common.mk file for extra configuration for the makefile. Could you please pass it to me so that I get an example of what's missing?

  Around this part of the SDK is radically changed since then.
Common.mk in the examples/ directory looked like the following back
then.  But it needs to be adopted the new regime.

-- Yoshiki

-----------------------------------
# Copyright (c) 2011, The Native Client Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Common makefile for the examples.  This has some basic variables, such as
# CC (the compiler) and some suffix rules such as .c.o.
#
# The main purpose of this makefile component is to demonstrate building a
# Native Client module (.nexe)

.SUFFIXES: .c .cc .cpp .o

.PHONY: check_variables

ifeq ($(origin OS), undefined)
  ifeq ($(shell uname -s), Darwin)
    OS=Darwin
  else
    OS=$(shell uname -o)
  endif
endif

ifeq ($(OS), $(filter $(OS), Windows_NT Cygwin))
  PLATFORM = win
  TARGET = x86
endif
ifeq ($(OS), $(filter $(OS), Darwin MACOS))
  PLATFORM = mac
  TARGET = x86
endif

# Look for 'Linux' in the $(OS) string.  $(OS) is assumed to be a Linux
# variant if the result of $(findstring) is not empty.
ifneq (, $(findstring Linux, $(OS)))
  PLATFORM = linux
  TARGET = x86
endif

PYTHON ?= /usr/bin/python
NACL_SDK_ROOT ?= .

NACL_TOOLCHAIN_DIR = toolchain/$(PLATFORM)_$(TARGET)

CC = $(NACL_SDK_ROOT)/$(NACL_TOOLCHAIN_DIR)/bin/nacl-gcc
CPP = $(NACL_SDK_ROOT)/$(NACL_TOOLCHAIN_DIR)/bin/nacl-g++
NACL_STRIP = $(NACL_SDK_ROOT)/$(NACL_TOOLCHAIN_DIR)/bin/nacl-strip
NACL_SEL_LDR32 = $(NACL_SDK_ROOT)/$(NACL_TOOLCHAIN_DIR)/bin/nacl-sel_ldr
NACL_SEL_LDR64 = $(NACL_SDK_ROOT)/$(NACL_TOOLCHAIN_DIR)/bin/nacl64-sel_ldr

CFLAGS = -Wall -Wno-long-long -pthread -Werror
OPT_FLAGS = -O2
DEBUG_FLAGS = -g

# Make all the object files depend on the entire list of header files.  This
# is a little brutal, but it gets the job dome simply without a make depend
# step.
%_x86_32_dbg.o: %.c $(HFILES)
	$(CC) $(CFLAGS) -m32 $(INCLUDES) $(DEBUG_FLAGS) -c -o $@ $<

%_x86_32_dbg.o: %.cc $(HFILES)
	$(CPP) $(CFLAGS) -m32 $(INCLUDES) $(DEBUG_FLAGS) -c -o $@ $<

%_x86_64_dbg.o: %.c $(HFILES)
	$(CC) $(CFLAGS) -m64 $(INCLUDES) $(DEBUG_FLAGS) -c -o $@ $<

%_x86_64_dbg.o: %.cc $(HFILES)
	$(CPP) $(CFLAGS) -m64 $(INCLUDES) $(DEBUG_FLAGS) -c -o $@ $<

%_x86_32.o: %.c $(HFILES)
	$(CC) $(CFLAGS) -m32 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

%_x86_32.o: %.cc $(HFILES)
	$(CPP) $(CFLAGS) -m32 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

%_x86_32.o: %.cpp $(HFILES)
	$(CPP) $(CFLAGS) -m32 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

%_x86_64.o: %.c $(HFILES)
	$(CC) $(CFLAGS) -m64 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

%_x86_64.o: %.cc $(HFILES)
	$(CPP) $(CFLAGS) -m64 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

%_x86_64.o: %.cpp $(HFILES)
	$(CPP) $(CFLAGS) -m64 $(INCLUDES) $(OPT_FLAGS) -c -o $@ $<

# Generate list of .o files based on the list of .c and .cc files
OBJECTS_X86_32 = $(CFILES:%.c=%_x86_32.o) $(CCFILES:%.cc=%_x86_32.o)
OBJECTS_X86_64 = $(CFILES:%.c=%_x86_64.o) $(CCFILES:%.cc=%_x86_64.o)
OBJECTS_X86_32_DBG = $(CFILES:%.c=%_x86_32_dbg.o) $(CCFILES:%.cc=%_x86_32_dbg.o)
OBJECTS_X86_64_DBG = $(CFILES:%.c=%_x86_64_dbg.o) $(CCFILES:%.cc=%_x86_64_dbg.o)

# Make sure certain variables are defined.  This rule is set as a dependency
# for all the .nexe builds in the examples.
check_variables:
ifeq ($(origin OS), undefined)
	@echo "Error: OS is undefined" ; exit 42
endif
ifeq ($(origin PLATFORM), undefined)
	@echo "Error: PLATFORM is undefined (OS = $(OS))" ; exit 42
endif
ifeq ($(origin TARGET), undefined)
	@echo "Error: TARGET is undefined (OS = $(OS))" ; exit 42
endif
ifeq ($(origin NACL_SDK_ROOT), undefined)
	@echo "Error: NACL_SDK_ROOT is undefined" ; exit 42
endif