avr: use compiler-rt

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This change adds support for compiler-rt, which supports float64 (unlike
libgcc for AVR). This gets a number of tests to pass that require
float64 support.

We're still using libgcc with this change, but libgcc will probably be
removed eventually once AVR support in compiler-rt is a bit more mature.

I've also pushed a fix for a small regression in our
xtensa_release_14.0.0-patched LLVM branch that has also been merged
upstream. Without it, a floating point comparison against zero always
returns true which is certainly a bug. It is necessary to correctly
print floating point values.

This commit is contained in:

Ayke van Laethem

2021-02-12 01:34:22 +01:00

committed by

Ron Evans

parent a94e03eff2

commit 109b5298c4

7 changed files with 26 additions and 23 deletions

									
										targets/avr.json
									
		+1
		
												View File
												
				@@ -6,6 +6,7 @@

					"gc": "conservative",

					"linker": "avr-gcc",

					"scheduler": "none",

					"rtlib": "compiler-rt",

					"default-stack-size": 256,

					"cflags": [

						"-Werror"