jonnycoder1 · October 5, 2023 16:06
diff --git a/Kotlin Support for Embedded Linux Devices b/Kotlin Support for Embedded Linux Devices
 # Update February 2023
 Kotlin has announced deprecation of linuxArm32Hfp and other build targets:
 https://blog.jetbrains.com/kotlin/2023/02/update-regarding-kotlin-native-targets/


 # Diving Into ARM Cross Compilation for the First Time
 A year ago this month, I was troubleshooting why our Kotlin C++ dynamic library was giving my team errors
 regarding deprecated cp15 barrier instruction on one of our Linux ARM consumer device models, but not the others. It turns out none of knew that 
 the impacted model used an ARMv8 64bit SOC and that CP15 instructions were deprecated and stopped working in ARMv8. 

 My role was mostly that of a backend software engineer who had obtained some excellent experience in embedded C++ development thanks 
 to integration of multiple projects between my team's Python API and the device firmware. A very smart firmware coworker of mine 
 recommended that I recompile our Kotlin dynamic library using a ARMv7 or ARMv8 toolchain within Kotlin.

 # Reverse Engineering Kotlin Native Compiler aka Konan
 On my journey down the rabbit hole that is Kotlin multiplatform programming and cross compilation, I opened a Jetbrains YouTrack
 support ticket found here:
 https://youtrack.jetbrains.com/issue/KT-54427/Kotlin-Native-linuxArm32Hfp-produces-armv6-.so-despite-using-compilerOpts-marcharmv7
 The support ticket documents my Q&A with reverse engineering Kotlin's native compilation and successfully documenting how one can 
 swap out the ARMv6 compiler with an ARMv7 or ARMv8 compiler.

 # Lessons Learned
 Some difficult problems will be frustrating especially in the face of abstraction hell, but the point of solving difficult 
 problems is to become better at it. It is also helpful to document your challenges because they make for great stories when 
 applying for a new job.

 If you have read this far, perhaps you are interested in hiring an experienced software engineer who loves to solve problems? If 
 so, send me an email at jonnycoder@gmail.com

 Notes & References:
 -https://www.baeldung.com/kotlin/multiplatform-programming
 -https://linaro-toolchain.linaro.narkive.com/FujRlXHl/question-on-using-deprecated-cp15-barrier-instruction
	# Update February 2023
	Kotlin has announced deprecation of linuxArm32Hfp and other build targets:
	https://blog.jetbrains.com/kotlin/2023/02/update-regarding-kotlin-native-targets/


	# Diving Into ARM Cross Compilation for the First Time
	A year ago this month, I was troubleshooting why our Kotlin C++ dynamic library was giving my team errors
	regarding deprecated cp15 barrier instruction on one of our Linux ARM consumer device models, but not the others. It turns out none of knew that
	the impacted model used an ARMv8 64bit SOC and that CP15 instructions were deprecated and stopped working in ARMv8.

	My role was mostly that of a backend software engineer who had obtained some excellent experience in embedded C++ development thanks
	to integration of multiple projects between my team's Python API and the device firmware. A very smart firmware coworker of mine
	recommended that I recompile our Kotlin dynamic library using a ARMv7 or ARMv8 toolchain within Kotlin.

	# Reverse Engineering Kotlin Native Compiler aka Konan
	On my journey down the rabbit hole that is Kotlin multiplatform programming and cross compilation, I opened a Jetbrains YouTrack
	support ticket found here:
	https://youtrack.jetbrains.com/issue/KT-54427/Kotlin-Native-linuxArm32Hfp-produces-armv6-.so-despite-using-compilerOpts-marcharmv7
	The support ticket documents my Q&A with reverse engineering Kotlin's native compilation and successfully documenting how one can
	swap out the ARMv6 compiler with an ARMv7 or ARMv8 compiler.

	# Lessons Learned
	Some difficult problems will be frustrating especially in the face of abstraction hell, but the point of solving difficult
	problems is to become better at it. It is also helpful to document your challenges because they make for great stories when
	applying for a new job.

	If you have read this far, perhaps you are interested in hiring an experienced software engineer who loves to solve problems? If
	so, send me an email at jonnycoder@gmail.com

	Notes & References:
	-https://www.baeldung.com/kotlin/multiplatform-programming
	-https://linaro-toolchain.linaro.narkive.com/FujRlXHl/question-on-using-deprecated-cp15-barrier-instruction
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