tiny nuisance: framework rebuilt on first two runs

[nopdotcom]

Configuration

Operating system: Mac OS X 10.11.4

PlatformIO Version (platformio --version): PlatformIO, version 2.9.0.dev1

This also occurs in 2.8.6.

Description of problem

This problem does not significantly affect the usability of PlatformIO. I report it for the record, and in case it is a symptom of other problems with scons. Feel free to close it.

When I build a project for the first time, the framework is compiled on the first two invocations of platformio run. From the third run, it is not rebuilt.

Steps to Reproduce

1. $ rm -rf .pioenvs or pio run -t clean
2. $ pio run
3. $ pio run
4. $ pio run

Actual Results

1. .pioenvs is cleaned or removed

[Tue Apr 26 11:05:09 2016] Processing myleo (platform: atmelavr, board: leonardo, framework: arduino)
--------------------------------------------------------------------------------
avr-g++ -o .pioenvs/myleo/src/tmp_ino_to.o -c -fno-exceptions -fno-threadsafe-statics -std=gnu++11 -g -Os -Wall -ffunction-sections -fdata-sections -mmcu=atmega32u4 -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO_AVR_LEONARDO -DUSB_VID=0x2341 -DUSB_PID=0x8036 "-DUSB_PRODUCT=\"Arduino Leonardo\"" -DUSB_MANUFACTURER=\"Arduino\" -DARDUINO=10608 -DPLATFORMIO=020900 -I.pioenvs/myleo/FrameworkArduino -I.pioenvs/myleo/FrameworkArduinoVariant tmp_ino_to.cpp
avr-ar rcs .pioenvs/myleo/libFrameworkArduinoVariant.a
avr-ranlib .pioenvs/myleo/libFrameworkArduinoVariant.a
avr-g++ -o .pioenvs/myleo/FrameworkArduino/CDC.o -c -fno-exceptions -fno-threadsafe-statics -std=gnu++11 -g -Os -Wall -ffunction-sections -fdata-sections -mmcu=atmega32u4 -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO_AVR_LEONARDO -DUSB_VID=0x2341 -DUSB_PID=0x8036 "-DUSB_PRODUCT=\"Arduino Leonardo\"" -DUSB_MANUFACTURER=\"Arduino\" -DARDUINO=10608 -I.pioenvs/myleo/FrameworkArduino -I.pioenvs/myleo/FrameworkArduinoVariant .pioenvs/myleo/FrameworkArduino/CDC.cpp
[…]

[Tue Apr 26 11:06:11 2016] Processing myleo (platform: atmelavr, board: leonardo, framework: arduino)
--------------------------------------------------------------------------------
avr-g++ -o .pioenvs/myleo/src/tmp_ino_to.o -c -fno-exceptions -fno-threadsafe-statics -std=gnu++11 -g -Os -Wall -ffunction-sections -fdata-sections -mmcu=atmega32u4 -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO_AVR_LEONARDO -DUSB_VID=0x2341 -DUSB_PID=0x8036 "-DUSB_PRODUCT=\"Arduino Leonardo\"" -DUSB_MANUFACTURER=\"Arduino\" -DARDUINO=10608 -DPLATFORMIO=020900 -I.pioenvs/myleo/FrameworkArduino -I.pioenvs/myleo/FrameworkArduinoVariant tmp_ino_to.cpp
avr-ar rcs .pioenvs/myleo/libFrameworkArduinoVariant.a
avr-ranlib .pioenvs/myleo/libFrameworkArduinoVariant.a
avr-g++ -o .pioenvs/myleo/FrameworkArduino/CDC.o -c -fno-exceptions -fno-threadsafe-statics -std=gnu++11 -g -Os -Wall -ffunction-sections -fdata-sections -mmcu=atmega32u4 -DF_CPU=16000000L -DARDUINO_ARCH_AVR -DARDUINO_AVR_LEONARDO -DUSB_VID=0x2341 -DUSB_PID=0x8036 "-DUSB_PRODUCT=\"Arduino Leonardo\"" -DUSB_MANUFACTURER=\"Arduino\" -DARDUINO=10608 -I.pioenvs/myleo/FrameworkArduino -I.pioenvs/myleo/FrameworkArduinoVariant .pioenvs/myleo/FrameworkArduino/CDC.cpp
[…]

[Tue Apr 26 11:06:58 2016] Processing myleo (platform: atmelavr, board: leonardo, framework: arduino)
--------------------------------------------------------------------------------
scons: `.pioenvs/myleo/firmware.hex' is up to date.
[…]

Expected Results

1. All platformio temporaries removed
2. Main program and platform built
3. “Up to date”
4. “Up to date"

If problems with PlatformIO Build System:

The content of platformio.ini:

[env:myleo]
platform=atmelavr
framework=arduino
board=leonardo

[platformio]
src_dir=.

Source file to reproduce issue:

#include <Arduino.h>

void setup() {
  Serial.begin(57600);
}

void loop() {
  Serial.println("Hello");
}

Additional info

I’ll see if I can figure this out on my own. It is a low priority for me, and it should be a very low priority for you.

Arduino IDE seems to have a related problem, but far worse: https://forum.pjrc.com/threads/34233-Build-options-changed-rebuilding-all . Even when it is going to reuse .o files, trunk arduino-builder runs avr-g++ over all framework source every build (to do the .ino->.cpp transformation?) PlatformIO is faster even when rebuilding everything!

Yes, I starred this project and followed you on Twitter. :–) I’ll see if I can get any interest from the MediaTek people.

[ivankravets]

Yes, I starred this project and followed you on Twitter. :–)

😺 😺 😺 😺 😺 😺 😺

I’ll see if I can get any interest from the MediaTek people.

Would be great! We need help from hardware vendors.