From 81c21088196fd92d08c253efc2feb8dbead88acf Mon Sep 17 00:00:00 2001
From: KOBAYASHI Shuji <shuujii@gmail.com>
Date: Mon, 19 Oct 2020 15:03:22 +0900
Subject: Revert `MRUBY_TARGET` mechanism; ref #5096

* In explanation of mruby, the expression `build_config.rb` is frequently
  used including official documents, so I think that it will not make sense
  if the file is no longer used.
* The `MRUBY_TARGET` mechanism seems to have little improvement, so I don't
  think it should be changed to avoid unnecessary confusion.
* `MRUBY_TARGET` and `MRuby.targets` represent somewhat different things,
  so using the same term "target" is a bit confusing.

The mechanism that can be written short when using a file under
`build_config` (renamed from `target`) directory remains
(`build_config/${MRUBY_CONFIG}.rb` is used if the path specified
in `MRUBY_CONFIG` doesn't exist).
---
 build_config/ArduinoDue.rb | 74 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 build_config/ArduinoDue.rb

(limited to 'build_config/ArduinoDue.rb')

diff --git a/build_config/ArduinoDue.rb b/build_config/ArduinoDue.rb
new file mode 100644
index 000000000..5859f8508
--- /dev/null
+++ b/build_config/ArduinoDue.rb
@@ -0,0 +1,74 @@
+# Cross Compiling configuration for Arduino Due
+# http://arduino.cc/en/Main/ArduinoBoardDue
+#
+# Requires Arduino IDE >= 1.5
+MRuby::CrossBuild.new("ArduinoDue") do |conf|
+  toolchain :gcc
+
+  # Mac OS X, Arduino IDE <= 1.5.6
+  # ARDUINO_PATH = '/Applications/Arduino.app/Contents/Resources/Java'
+  # Mac OS X, Arduino IDE >= 1.5.7
+  # ARDUINO_PATH = '/Applications/Arduino.app/Contents/Java'
+  # GNU Linux
+  ARDUINO_PATH = '/opt/arduino'
+   # Arduino IDE <= 1.5.6
+  BIN_PATH = "#{ARDUINO_PATH}/hardware/tools/g++_arm_none_eabi/bin"
+  # Arduino IDE >= 1.5.7
+  # BIN_PATH = "#{ARDUINO_PATH}/hardware/tools/gcc-arm-none-eabi-4.8.3-2014q1/bin"
+  SAM_PATH = "#{ARDUINO_PATH}/hardware/arduino/sam"
+  TARGET_PATH = "#{SAM_PATH}/variants/arduino_due_x"
+
+  conf.cc do |cc|
+    cc.command = "#{BIN_PATH}/arm-none-eabi-gcc"
+    cc.include_paths << ["#{SAM_PATH}/system/libsam", "#{SAM_PATH}/system/CMSIS/CMSIS/Include/",
+                        "#{SAM_PATH}/system/CMSIS/Device/ATMEL/",
+                        "#{SAM_PATH}/cores/arduino", "#{SAM_PATH}/libraries","#{TARGET_PATH}"]
+    cc.flags = %w(-g -Os -w -ffunction-sections -fdata-sections -nostdlib --param max-inline-insns-single=500
+                -Dprintf=iprintf -mcpu=cortex-m3 -DF_CPU=84000000L -DARDUINO=156 -DARDUINO_SAM_DUE -DARDUINO_ARCH_SAM
+                -D__SAM3X8E__ -mthumb -DUSB_PID=0x003e -DUSB_VID=0x2341 -DUSBCON -DUSB_MANUFACTURER="Unknown" -DUSB_PRODUCT="Arduino Due")
+    cc.compile_options = %Q[%{flags} -o "%{outfile}" -c "%{infile}"]
+
+    #configuration for low memory environment
+    cc.defines << %w(MRB_HEAP_PAGE_SIZE=64)
+    cc.defines << %w(KHASH_DEFAULT_SIZE=8)
+    cc.defines << %w(MRB_STR_BUF_MIN_SIZE=20)
+    cc.defines << %w(MRB_GC_STRESS)
+    #cc.defines << %w(MRB_DISABLE_STDIO) #if you dont need stdio.
+    #cc.defines << %w(POOL_PAGE_SIZE=1000) #effective only for use with mruby-eval
+  end
+
+  conf.cxx do |cxx|
+    cxx.command = conf.cc.command.dup
+    cxx.include_paths = conf.cc.include_paths.dup
+    cxx.flags = conf.cc.flags.dup
+    cxx.flags << %w(-fno-rtti -fno-exceptions)
+    cxx.defines = conf.cc.defines.dup
+    cxx.compile_options = conf.cc.compile_options.dup
+  end
+
+  conf.archiver do |archiver|
+    archiver.command = "#{BIN_PATH}/arm-none-eabi-ar"
+    archiver.archive_options = 'rcs "%{outfile}" %{objs}'
+  end
+
+  #no executables
+  conf.bins = []
+
+  #do not build executable test
+  conf.build_mrbtest_lib_only
+
+  #disable C++ exception
+  conf.disable_cxx_exception
+
+  #gems from core
+  conf.gem :core => "mruby-print"
+  conf.gem :core => "mruby-math"
+  conf.gem :core => "mruby-enum-ext"
+
+  #light-weight regular expression
+  conf.gem :github => "masamitsu-murase/mruby-hs-regexp", :branch => "master"
+
+  #Arduino API
+  #conf.gem :github =>"kyab/mruby-arduino", :branch => "master"
+
+end
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