Cannot compile empty teensy35 project using arduino-builder

[mmassi]

I am trying to compile an empty sketch from the command line (explanation on why I want to do this at the bottom).

I am on Linux, the installation is a clean arduino IDE 1.8.7, patched by teensyduino 1.44.

The command I run is this:

../arduino-1.8.7/arduino-builder -verbose -build-path /home/massi/teensy/build -build-cache /home/massi/teensy/cache -hardware ~massi/arduino-1.8.7/hardware -tools ~massi/arduino-1.8.7/tools -fqbn=teensy:avr:teensy35:speed=120 empty.ino/empty.ino.ino

I am not sure about the fqbn I should use (BTW, where is this documented?).
And my guess is that the problem is likely a wrong or incomplete fqbn.

The error I get is

<command-line>:0:1: error: macro names must be identifiers

, because at some point the build system runs this command:

/home/massi/arduino-1.8.7/hardware/teensy/../tools/arm/bin/arm-none-eabi-g++ -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant -D__MK64FX512__ -DTEENSYDUINO=144 -DARDUINO=10600 -DF_CPU=120000000 -D -DLAYOUT_ -I/home/massi/arduino-1.8.7/hardware/teensy/avr/cores/teensy3 /home/massi/teensy/build/sketch/empty.ino.ino.cpp -o /home/massi/teensy/build/preproc/ctags_target_for_gcc_minus_e.cpp

If you look carefully, you'l see a standalone "-D" option in that command.
There's some sort of "empty define", likely something that should have been in the build arguments.
Running that command without the standalone "-D" works.

How do I fix this?
Thanks!


Now the reason why I am doing this.
What I actually plan to do is to use Rust (the programming language) to write the sketch, but reusing (linking) the existing C core library.
To do so I need to run the build on the command line, produce the core library, and see the link command as performed by arduino-builder.
I can modify the link command, then replacing the sketch object file with one I generated with Rust.
I already did this with other arduino platforms and it works
It is a very simple way of using Rust to write my code while keeping the core library to initialize the board and perform low level functions.

 

[PaulStoffregen]

Try using

-fqbn=teensy:avr:teensy35:speed=120:usb=serial:opt=o2std:keys=en-us

 

[mmassi]

Thanks for the quick reply!

However, it did not work.

This is the full log of what happens on the terminal (both my command and the output):

[massi@matrix teensy]$ ../arduino-1.8.7/arduino-builder -verbose -build-path /home/massi/teensy/build -build-cache /home/massi/teensy/cache -hardware ~massi/arduino-1.8.7/hardware -tools ~massi/arduino-1.8.7/tools -fqbn=teensy:avr:teensy35:speed=120:usb=serial:opt=o2std:keys=en-us empty.ino/empty.ino.ino 
Using board 'teensy35' from platform in folder: /home/massi/arduino-1.8.7/hardware/teensy/avr
Using core 'teensy3' from platform in folder: /home/massi/arduino-1.8.7/hardware/teensy/avr
Detecting libraries used...
/home/massi/arduino-1.8.7/hardware/teensy/../tools/arm/bin/arm-none-eabi-g++ -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant -D__MK64FX512__ -DTEENSYDUINO=144 -DARDUINO=10600 -DF_CPU=120000000 -D -DLAYOUT_ -I/home/massi/arduino-1.8.7/hardware/teensy/avr/cores/teensy3 /home/massi/teensy/build/sketch/empty.ino.ino.cpp -o /dev/null
Error while detecting libraries included by /home/massi/teensy/build/sketch/empty.ino.ino.cpp
Generating function prototypes...
/home/massi/arduino-1.8.7/hardware/teensy/../tools/arm/bin/arm-none-eabi-g++ -E -CC -x c++ -w -g -Wall -ffunction-sections -fdata-sections -nostdlib -fno-exceptions -felide-constructors -std=gnu++14 -Wno-error=narrowing -fno-rtti -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant -D__MK64FX512__ -DTEENSYDUINO=144 -DARDUINO=10600 -DF_CPU=120000000 -D -DLAYOUT_ -I/home/massi/arduino-1.8.7/hardware/teensy/avr/cores/teensy3 /home/massi/teensy/build/sketch/empty.ino.ino.cpp -o /home/massi/teensy/build/preproc/ctags_target_for_gcc_minus_e.cpp
<command-line>:0:1: error: macro names must be identifiers
exit status 1

The error is always the same, that lonely "-D" option, in both commands run by the builder (library detection and prototype generation).

For what is worth, the empty sketch file is this:

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Can you reproduce it in your environment?
It should not take much, just create an empty sketch and run arduino-builder on it.

 

[Frank B]

It should not take much, just create an empty sketch and run arduino-builder on it.

Hm. Yes. Why don't you do it Just open arduino, press upload. Mine shows this in the black window:

C:\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Arduino\hardware -hardware C:\Users\Frank\AppData\Local\Arduino15\packages -tools C:\Arduino\tools-builder -tools C:\Arduino\hardware\tools\avr -tools C:\Users\Frank\AppData\Local\Arduino15\packages -built-in-libraries C:\Arduino\libraries -libraries C:\Users\Frank\Documents\Arduino\libraries -fqbn=teensy:avr:teensy35:usb=serial,speed=120,opt=o2std,keys=en-us -ide-version=10807 -build-path c:\temp\arduino_build_935264 -warnings=all -build-cache c:\temp\arduino_cache_857759 -verbose c:\temp\untitled1486180498.tmp\sketch_oct05a\sketch_oct05a.ino
C:\Arduino\arduino-builder -compile -logger=machine -hardware C:\Arduino\hardware -hardware C:\Users\Frank\AppData\Local\Arduino15\packages -tools C:\Arduino\tools-builder -tools C:\Arduino\hardware\tools\avr -tools C:\Users\Frank\AppData\Local\Arduino15\packages -built-in-libraries C:\Arduino\libraries -libraries C:\Users\Frank\Documents\Arduino\libraries -fqbn=teensy:avr:teensy35:usb=serial,speed=120,opt=o2std,keys=en-us -ide-version=10807 -build-path c:\temp\arduino_build_935264 -warnings=all -build-cache c:\temp\arduino_cache_857759 -verbose c:\temp\untitled1486180498.tmp\sketch_oct05a\sketch_oct05a.ino

hope it helps..

 

[PaulStoffregen]

If you don't see those messages in Arduino, click File > Preferences and turn on verbose info while compiling.

 

[mmassi]

If you don't see those messages in Arduino, click File > Preferences and turn on verbose info while compiling.

Well... *sorry* for the noise, and thanks to everybody.
Obviously it worked, and now I am able to build from the command line.

Thanks again!
Massimiliano