Compiler Requirements
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The MPASM™ toolchain will no longer be installed with MPLAB® X IDE starting with v5.40. This means no toolchain will be available by default when the IDE is installed for the first time. Therefore, you will see a message on opening the IDE that there is no toolchain installed.

Table: Supported Compilers and Assemblers

Compiler Toolchain Earliest Compatible Version
MPLAB XC8 XC8 1.0 and later
PIC® Assembler1 XC8 1.0 and later
MPLAB XC16 XC16 1.0 and later
MPLAB XC32 XC32 1.0 and later
Arm® GNU Arm GNU 5.3.1 and later
AVR® GNU AVR GNU 3.4.3 and later
AVR Assembler2 AVRASM2 2.2.6 and later

1. See "MPASM™ to MPLAB® XC8 PIC® Assembler Migration Guide".
2. Included with Atmel Studio.

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