dry-run compile flag no more available in CLI 0.14.0 and optimization flags

Software Arduino command line tools
1

Hi, two questions:

  • Is there any reason to remove the --dry-run flag from the compile command? I find useful to just check compilation without generating the build output folder...

  • I'm trying to change the optimization flag updating platform.txt (e.g. compiler.optimization_flags=-O0) and also adding a platform.local.txt to override the default variables but the compiler seems to ever use -Os, any idea?

Target is SAM D21.

Thanks.

2

neutrinonet:

  • Is there any reason to remove the --dry-run flag from the compile command?

Arduino CLI now defaults to the --dry-run behavior, so there is no longer any need for that flag.

neutrinonet:

  • I'm trying to change the optimization flag updating platform.txt (e.g. compiler.optimization_flags=-O0) and also adding a platform.local.txt to override the default variables but the compiler seems to ever use -Os, any idea?

Please provide the details about what you tried and I'm sure I'll be able to help you out.

3

Thanks for your fast reply. Good to know about the compile command. About optimization flags with default platform.txt (-Os) the output of the compile --show-properties shows:

compiler.optimization_flags=-Os
compiler.optimization_flags.debug=-Og -g3
compiler.optimization_flags.release=-Os

and on compile the output actually reflect this:

"C:\\arduino.core\\packages\\arduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -w -std=gnu++11 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -w -x c++ -E -CC -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_XFARM_SAMD21_IOT_BOARD_09X -DARDUINO_ARCH_SAMD -D__SAMD21J18A__ -DUSB_VID=0x2341 -DUSB_PID=0x804d -DUSBCON "-DUSB_MANUFACTURER=\"xFarm SA\"" "-DUSB_PRODUCT=\"xFarm SAMD21 IoT board v0.9x\"" "-IC:\\arduino.core\\packages\\arduino\\tools\\CMSIS\\4.5.0/CMSIS/Include/" "-IC:\\arduino.core\\packages\\arduino\\tools\\CMSIS-Atmel\\1.2.0/CMSIS/Device/ATMEL/" "-IC:\\Users\\Luca\\Playground\\projects\\arduino-cli\\xfarm-samd21.book\\hardware\\xfarm\\samd\\0.92\\cores\\arduino" "-IC:\\Users\\Luca\\Playground\\projects\\arduino-cli\\xfarm-samd21.book\\hardware\\xfarm\\samd\\0.92\\variants\\samd21" "C:\\Users\\Luca\\AppData\\Local\\Temp\\arduino-sketch-540D1551EFB7B212227516CBA9AAD5A3\\sketch\\xprobe_test.ino.cpp" -o nul

but when I modify platform.txt reading "compiler.optimization_flags=-O3" the output of the commands above are the same (i.e. still using -Os), I expect instrad to report the updated optimisation flag.