My code won't compile using an Adafruit Trinket 3V. On an Arduino Uno, it compiles ok. So, is library IRremote supposed to work on a Trinket? I have found nothing that says it's not.

If I try to compile example SimpleSender on the Trinket, it does not compile due to all the Serial... code, which is due to the Trinket not having Serial capability. If I then comment out all the Serial... lines, SimpleSender compiles OK.

Back to my code, if I go into the library's src directory and in IRReceive.hpp, comment out

printIRResultsAsCArray(&Serial);

then it compiles ok. But editing IRReceive.hpp is not the way to do things.

I'm using Arduino IDE 1.8.19.
Tools > Board is set to Adafruit Trinket (ATtiny85 @ 8MHz).
Tools > programmer is set to USBtinyISP
Tools > port is grayed out.

My code:
#include <IRremote.hpp>

const byte butonPin = 2; //button input
const byte IRPin = 1; // LED output

void setup()
{
// connect button to ground and input
pinMode(butonPin, INPUT_PULLUP);

IrSender.begin(IRPin);
}

void loop()
{
static bool lastButtonState = HIGH;
bool buttonState = digitalRead(butonPin);
if (buttonState != lastButtonState)
{
if (buttonState == LOW)
{
IrSender.sendNEC(0xED12BF40, 0x12, 0);
}
lastButtonState = buttonState;
}
}

The compile error messages:
Arduino: 1.8.19 (Windows Store 1.8.57.0) (Windows 10), Board: "Adafruit Trinket (ATtiny85 @ 8MHz)"

C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\hardware -hardware C:\Users\johnm\Documents\ArduinoData\packages -tools C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\tools-builder -tools C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\hardware\tools\avr -tools C:\Users\johnm\Documents\ArduinoData\packages -built-in-libraries C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\libraries -libraries C:\Users\johnm\Documents\Arduino\libraries -fqbn=adafruit:avr:trinket3 -ide-version=10819 -build-path C:\Users\johnm\AppData\Local\Temp\arduino_build_995615 -warnings=none -build-cache C:\Users\johnm\AppData\Local\Temp\arduino_cache_280345 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.avrdude.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avr-gcc.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -verbose C:\Users\johnm\Documents\Arduino\HarryPotterWandProject\wand_transmitter_07_trinket\wand_transmitter_07_trinket.ino
C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\arduino-builder -compile -logger=machine -hardware C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\hardware -hardware C:\Users\johnm\Documents\ArduinoData\packages -tools C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\tools-builder -tools C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\hardware\tools\avr -tools C:\Users\johnm\Documents\ArduinoData\packages -built-in-libraries C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\libraries -libraries C:\Users\johnm\Documents\Arduino\libraries -fqbn=adafruit:avr:trinket3 -ide-version=10819 -build-path C:\Users\johnm\AppData\Local\Temp\arduino_build_995615 -warnings=none -build-cache C:\Users\johnm\AppData\Local\Temp\arduino_cache_280345 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.arduinoOTA.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.arduinoOTA-1.3.0.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\arduinoOTA\1.3.0 -prefs=runtime.tools.avrdude.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avrdude-6.3.0-arduino17.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avrdude\6.3.0-arduino17 -prefs=runtime.tools.avr-gcc.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -prefs=runtime.tools.avr-gcc-7.3.0-atmel3.6.1-arduino7.path=C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7 -verbose C:\Users\johnm\Documents\Arduino\HarryPotterWandProject\wand_transmitter_07_trinket\wand_transmitter_07_trinket.ino
Using board 'trinket3' from platform in folder: C:\Users\johnm\Documents\ArduinoData\packages\adafruit\hardware\avr\1.4.15
Using core 'arduino' from platform in folder: C:\Users\johnm\Documents\ArduinoData\packages\arduino\hardware\avr\1.8.6
Detecting libraries used...
"C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10819 -DARDUINO_AVR_TRINKET3 -DARDUINO_ARCH_AVR "-IC:\Users\johnm\Documents\ArduinoData\packages\arduino\hardware\avr\1.8.6\cores\arduino" "-IC:\Users\johnm\Documents\ArduinoData\packages\adafruit\hardware\avr\1.4.15\variants\tiny8" "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\sketch\wand_transmitter_07_trinket.ino.cpp" -o nul
Alternatives for IRremote.hpp: [IRremote@4.6.1]
ResolveLibrary(IRremote.hpp)
-> candidates: [IRremote@4.6.1]
"C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10819 -DARDUINO_AVR_TRINKET3 -DARDUINO_ARCH_AVR "-IC:\Users\johnm\Documents\ArduinoData\packages\arduino\hardware\avr\1.8.6\cores\arduino" "-IC:\Users\johnm\Documents\ArduinoData\packages\adafruit\hardware\avr\1.4.15\variants\tiny8" "-IC:\Users\johnm\Documents\Arduino\libraries\IRremote\src" "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\sketch\wand_transmitter_07_trinket.ino.cpp" -o nul
Generating function prototypes...
"C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -flto -w -x c++ -E -CC -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10819 -DARDUINO_AVR_TRINKET3 -DARDUINO_ARCH_AVR "-IC:\Users\johnm\Documents\ArduinoData\packages\arduino\hardware\avr\1.8.6\cores\arduino" "-IC:\Users\johnm\Documents\ArduinoData\packages\adafruit\hardware\avr\1.4.15\variants\tiny8" "-IC:\Users\johnm\Documents\Arduino\libraries\IRremote\src" "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\sketch\wand_transmitter_07_trinket.ino.cpp" -o "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\preproc\ctags_target_for_gcc_minus_e.cpp"
"C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.57.0_x86__mdqgnx93n4wtt\tools-builder\ctags\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\preproc\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\Users\johnm\Documents\ArduinoData\packages\arduino\tools\avr-gcc\7.3.0-atmel3.6.1-arduino7/bin/avr-g++" -c -g -Os -w -std=gnu++11 -fpermissive -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -Wno-error=narrowing -MMD -flto -mmcu=attiny85 -DF_CPU=8000000L -DARDUINO=10819 -DARDUINO_AVR_TRINKET3 -DARDUINO_ARCH_AVR "-IC:\Users\johnm\Documents\ArduinoData\packages\arduino\hardware\avr\1.8.6\cores\arduino" "-IC:\Users\johnm\Documents\ArduinoData\packages\adafruit\hardware\avr\1.4.15\variants\tiny8" "-IC:\Users\johnm\Documents\Arduino\libraries\IRremote\src" "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\sketch\wand_transmitter_07_trinket.ino.cpp" -o "C:\Users\johnm\AppData\Local\Temp\arduino_build_995615\sketch\wand_transmitter_07_trinket.ino.cpp.o"
In file included from C:\Users\johnm\Documents\Arduino\libraries\IRremote\src/IRremote.hpp:264:0,
from C:\Users\johnm\Documents\Arduino\HarryPotterWandProject\wand_transmitter_07_trinket\wand_transmitter_07_trinket.ino:1:
C:\Users\johnm\Documents\Arduino\libraries\IRremote\src/IRReceive.hpp: In member function 'void IRrecv::printIRSendUsage(Print*)':
C:\Users\johnm\Documents\Arduino\libraries\IRremote\src/IRReceive.hpp:1951:36: error: 'Serial' was not declared in this scope
printIRResultAsCArray(&Serial);
^~~~~~
C:\Users\johnm\Documents\Arduino\libraries\IRremote\src/IRReceive.hpp:1951:36: note: suggested alternative: 'aSerial'
printIRResultAsCArray(&Serial);
^~~~~~
aSerial
Using library IRremote at version 4.6.1 in folder: C:\Users\johnm\Documents\Arduino\libraries\IRremote
exit status 1
Error compiling for board Adafruit Trinket (ATtiny85 @ 8MHz).