targets: add CPU property everywhere

mirror of https://github.com/tinygo-org/tinygo.git synced 2026-08-12 15:03:41 +00:00

This is for consistency with Clang, which always adds a CPU flag even if
it's not specified in CFLAGS.

This commit also adds some tests to make sure the Clang target-cpu
matches the CPU property in the JSON files.

This does have an effect on the generated binaries. The effect is very
small though: on average just 0.2% increase in binary size, apparently
because Cortex-M3 and Cortex-M4 are compiled a bit differently. However,
when rebased on top of https://github.com/tinygo-org/tinygo/pull/2218
(minsize), the difference drops to -0.1% (a slight decrease on average).

This commit is contained in:

Ayke van Laethem

2021-11-01 19:11:04 +01:00

committed by

Ron Evans

parent c2165f74d8

commit 29206cf0a4

21 changed files with 174 additions and 28 deletions

									
										targets/cortex-m7.json
									
		-1
	
												View File
												
				@@ -3,7 +3,6 @@

					"llvm-target": "armv7em-unknown-unknown-eabi",

					"cpu": "cortex-m7",

					"cflags": [

						"-mcpu=cortex-m7",

						"-mfloat-abi=soft"

					]

				}