Compilation fails for BasicExample

[robot-head]

I followed the directions here: https://github.com/sowbug/G35Arduino/blob/master/README.md

When I attempt to "verify" the sketch, I get the following compilation error:

G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0x4): undefined reference to __cxa_pure_virtual' G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0xc): undefined reference to__cxa_pure_virtual' G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0x1c): undefined reference to `__cxa_pure_virtual'

[robot-head]

This is with the Arduino 1.0 SDK, and a Teensy 2.0 target

[sowbug]

I just did a clean git clone and Verify for two targets (Leonardo and Uno) on Arduino 1.0, OSX. In both cases it succeeded. Can you tell me more about your environment?

The only thing remotely resembling a missing pure virtual is the default destructor in the G35 class. Can you try implementing it yourself and seeing whether that helps? Something like virtual ~G35() {} would do the trick. (I doubt that's the problem, though...)

[robot-head]

My environment is Arduino 1.0 on OSX 10.7.3.

[robot-head]

Weird, it compiled fine for the Uno, but not the Teensy :(

[sowbug]

That's a good clue. Can you turn on compilation output in the Arduino settings and paste what comes out after a clean build? I'm interested in seeing exactly which compiler is used for the '1286 in the Teensy. Perhaps the Teensyduino toolchain includes its own compiler.

On Mar 23, 2012, at 4:48 PM, robot-headreply@reply.github.com wrote:

Weird, it compiled fine for the Uno, but not the Teensy :(

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Reply to this email directly or view it on GitHub: https://github.com/sowbug/G35Arduino/issues/9#issuecomment-4670072

[robot-head]

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/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-ar rcs /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/core.a /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/main.cpp.o /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-ar rcs /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/core.a /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/Print.cpp.o /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-ar rcs /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/core.a /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/Stream.cpp.o /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin/avr-ar rcs /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/core.a 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/var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/Orbiter.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/PlusPrograms.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/Pulse.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/RedGreenChase.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/Stereo.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/StockPrograms.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/Twinkle.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/G35Arduino/Worm.cpp.o /var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp/core.a -L/var/folders/00/09qm0000h01000cxqpysvccm0016yh/T/build6925138863111091044.tmp -lm G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0x4): undefined reference to __cxa_pure_virtual' G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0xc): undefined reference to__cxa_pure_virtual' G35Arduino/G35.cpp.o:(.rodata._ZTV3G35+0x1c): undefined reference to `__cxa_pure_virtual'

[sowbug]

Interesting. I mistakenly thought you were using the Teensy++, but now that I see the command line specifies the atmega32u4, that's indeed the 2.0, just as you said. The reason that's interesting is that it's the same hardware I use (though I build it as the Leonardo, which is nearly identical hardware, just with different pin labelings).

Does this item shed any light on the problem? http://stackoverflow.com/questions/920500/what-is-the-purpose-of-cxa-pure-virtual

And did you have any luck defining the destructor?

[robot-head]

I sort of understand the issue, but I wasn't able to define a destructor and fix the issue. Can you reproduce the issue using the built-in Teensy 2.0 toolchain?

[robot-head]

I added this to G35.ccp: ... G35::G35() : lightcount(0) { } (start of addition) G35::~G35() { } (end of addition) bool G35::set_color_if_in_range(uint8_t position, uint8_t intensity, ...

Results in:

G35.cpp:19: error: definition of implicitly-declared 'G35::~G35()'

[sowbug]

You have to declare it in the header, too.

On Mar 26, 2012, at 2:30 PM, robot-headreply@reply.github.com wrote:

I added this to G35.ccp: ... G35::G35() : lightcount(0) { } (start of addition) G35::~G35() { } (end of addition) bool G35::set_color_if_in_range(uint8_t position, uint8_t intensity, ...

Results in:

G35.cpp:19: error: definition of implicitly-declared 'G35::~G35()'

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