Hello,
When just using this simple line of Code, I get an linker error. Am I missing something? Can’t I use std::string in this context?
#include <Arduino.h>
#include <string>
void setup() {
std::string b = "abc"; //linker error
}
void loop() {
}
Output from platformio run:
[Fri Mar 23 11:51:29 2018] Processing teensy36 (platform: teensy; board: teensy36; framework: arduino)
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
PLATFORM: Teensy > Teensy 3.6
SYSTEM: MK66FX1M0 180MHz 256KB RAM (1MB Flash)
DEBUG: CURRENT(jlink) EXTERNAL(jlink)
Library Dependency Finder -> http://bit.ly/configure-pio-ldf
LDF MODES: FINDER(chain) COMPATIBILITY(light)
Collected 95 compatible libraries
Scanning dependencies...
No dependencies
Compiling .pioenvs/teensy36/src/main.cpp.o
Linking .pioenvs/teensy36/firmware.elf
/home/marc/.platformio/packages/toolchain-gccarmnoneeabi/bin/../lib/gcc/arm-none-eabi/5.4.1/../../../../arm-none-eabi/lib/armv7e-m/fpu/libc.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text._write_r+0x12): undefined reference to `_write'
collect2: error: ld returned 1 exit status
*** [.pioenvs/teensy36/firmware.elf] Error 1
My platformio.ini:
[env:teensy36]
platform = teensy
board = teensy36
framework = arduino
Platform information:
teensy ~ Teensy
===============
Teensy is a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects. All programming is done via the USB port. No special programmer is needed, only a standard USB cable and a PC or Macintosh with a USB port.
Version: 3.0.1
Home: http://platformio.org/platforms/teensy
Repository: https://github.com/platformio/platform-teensy.git
Vendor: https://www.pjrc.com/teensy
License: Apache-2.0
Frameworks: arduino, mbed
Packages
--------
Package toolchain-atmelavr
--------------------------
Type: toolchain
Requirements: ~1.40902.0
Installed: Yes
Version: 1.40902.0
Original version: 4.9.2
Description: avr-gcc
Package framework-arduinoteensy
-------------------------------
Type: framework
Requirements: ~1.141.0
Installed: Yes
Version: 1.141.0
Original version: 1.41
Description: Arduino Wiring-based Framework (Teensy Core)
Package tool-teensy
-------------------
Type: uploader
Requirements: <2
Installed: Yes
Version: 1.141.0
Original version: 1.41
Description: Teensy Loader
Package toolchain-gccarmnoneeabi
--------------------------------
Type: toolchain
Requirements: ~1.50401.0
Installed: Yes
Version: 1.50401.0
Original version: 5.4.1
Description: gcc-arm-embedded
Package framework-mbed
----------------------
Type: framework
Requirements: ~4.50703.0
Installed: No (optional)
Boards
------
ID MCU Frequency Flash RAM Name
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
teensy35 MK64FX512 120MHz 512KB 192KB Teensy 3.5
teensy20 ATMEGA32U4 16MHz 31.50KB 2.50KB Teensy 2.0
teensy36 MK66FX1M0 180MHz 1MB 256KB Teensy 3.6
teensy31 MK20DX256 72MHz 256KB 64KB Teensy 3.1 / 3.2
teensy30 MK20DX128 48MHz 128KB 16KB Teensy 3.0
teensylc MKL26Z64 48MHz 62KB 8KB Teensy LC
teensy20pp AT90USB1286 16MHz 127KB 8KB Teensy++ 2.0