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).

1 files changed, 0 insertions, 74 deletions

diff --git a/target/ArduinoDue.rb b/target/ArduinoDue.rb
deleted file mode 100644
index 5859f8508..000000000
--- a/target/ArduinoDue.rb
+++ /dev/null
@@ -1,74 +0,0 @@
-# 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