Arm Keil MDK can be used with the GNU Compiler Collection (GCC). GCC is an open-source development effort with numerous contributors; it is widely available and supports many devices. To use GCC, download the GNU Arm Embedded toolchain, and then: Open the dialog Project - Manage - Project Items - Folders/Extensions.
Is Keil compiler free?
It is free-to-use for software developers working with Holtek devices based on the Arm Cortex-M0+ cores. MDK for Nuvoton Cortex-M0/M23: The MDK for Nuvoton Cortex-M0/M23 is a license paid by Nuvoton.
Is Keil a cross compiler?
Keil is very popular cross compiler for 8051 microcontroller. It is different than Turbo C compiler. ... Keil starts to code with the target device in mind because the same compiler can be used for 300 different microcontrollers.