[NaCl SDK] Add a very simple getting_started example at top-level.

native_client_sdk/src/getting_started/part1/Makefile

+# Copyright (c) 2013 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.
+
+#
+# GNU Make based build file.  For details on GNU Make see:
+# http://www.gnu.org/software/make/manual/make.html
+#
+
+#
+# Get pepper directory for toolchain and includes.
+#
+# If NACL_SDK_ROOT is not set, then assume it can be found three directories up.
+#
+THIS_MAKEFILE := $(abspath $(lastword $(MAKEFILE_LIST)))
+NACL_SDK_ROOT ?= $(abspath $(dir $(THIS_MAKEFILE))../..)
+
+# Project Build flags
+WARNINGS := -Wno-long-long -Wall -Wswitch-enum -pedantic -Werror
+CXXFLAGS := -pthread -std=gnu++98 $(WARNINGS)
+
+#
+# Compute tool paths
+#
+GETOS :=python $(NACL_SDK_ROOT)/tools/getos.py

[eliben, 2013/09/09 19:10:53]

This is still inconsistent indentation

[binji, 2013/09/09 20:59:04]

Done.

+OSHELPERS = python $(NACL_SDK_ROOT)/tools/oshelpers.py
+OSNAME := $(shell $(GETOS))
+RM := $(OSHELPERS) rm
+
+PNACL_TC_PATH := $(abspath $(NACL_SDK_ROOT)/toolchain/$(OSNAME)_pnacl)
+PNACL_CXX := $(PNACL_TC_PATH)/newlib/bin/pnacl-clang++
+PNACL_FINALIZE := $(PNACL_TC_PATH)/newlib/bin/pnacl-finalize
+CXXFLAGS := -I$(NACL_SDK_ROOT)/include
+LDFLAGS := -L$(NACL_SDK_ROOT)/lib/pnacl/Release -lppapi_cpp -lppapi
+
+#
+# Disable DOS PATH warning when using Cygwin based tools Windows
+#
+CYGWIN ?= nodosfilewarning
+export CYGWIN
+
+
+# Declare the ALL target first, to make the 'all' target the default build
+all: hello_tutorial.pexe
+
+clean:
+        $(RM) hello_tutorial.pexe hello_tutorial.bc
+
+hello_tutorial.bc: hello_tutorial.cc
+        $(PNACL_CXX) -o $@ $< -O2 $(CXXFLAGS) $(LDFLAGS)
+
+hello_tutorial.pexe: hello_tutorial.bc
+        $(PNACL_FINALIZE) -o $@ $<
+
+
+#
+# File to redirect to to in order to hide output.
+#
+ifeq ($(OSNAME),win)
+DEV_NULL = nul

[eliben, 2013/09/09 19:10:53]

Indentation here? and within else?

[binji, 2013/09/09 20:59:04]

Hm. Seems like we're inconsistent about this in our Makefiles. Speaking with Sam
about it, we should probably avoid indenting:

Most lines are allowed to be indented, but rules recipes are not. We do indent
inside an ifeq below, but the indentation is required (because the lines are
part of the recipe). IMO, It's a bit strange to have different levels of
indentation mean different things.

In any case, if we decide to change this we should probably fix it as a separate
CL with the rest of the fixes.

+else
+DEV_NULL = /dev/null
+endif
+
+#
+# Assign a sensible default to CHROME_PATH.
+#
+CHROME_PATH ?= $(shell $(GETOS) --chrome 2> $(DEV_NULL))
+
+#
+# Verify we can find the Chrome executable if we need to launch it.
+#
+.PHONY: check_for_chrome
+check_for_chrome:
+ifeq (,$(wildcard $(CHROME_PATH)))
+        $(warning No valid Chrome found at CHROME_PATH=$(CHROME_PATH))
+        $(error Set CHROME_PATH via an environment variable, or command-line.)
+else
+        $(warning Using chrome at: $(CHROME_PATH))
+endif
+
+#
+# Variables for running examples with Chrome.
+#
+RUN_PY := python $(NACL_SDK_ROOT)/tools/run.py
+
+# Additional arguments to pass to Chrome.
+CHROME_ARGS += --enable-pnacl --no-first-run
+CHROME_ARGS += --user-data-dir=$(CURDIR)/user-data-dir
+
+# Define a phony rule so it always runs, to run the pexe.
+.PHONY: run
+run: check_for_chrome all
+        $(RUN_PY) -C $(CURDIR) -P index.html -- $(CHROME_PATH) $(CHROME_ARGS)