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Intel x86 Mac Cpu Fix #1955

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Intel x86 Mac Cpu Fix #1955

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4 changes: 4 additions & 0 deletions apple/internal/transition_support.bzl
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,9 @@ def _cpu_string(*, cpu, platform_type, settings = {}):
return "ios_sim_arm64"
return "ios_x86_64"
if platform_type == "macos":
host_cpu = settings["//command_line_option:host_cpu"]
if host_cpu == "darwin":
return "darwin"
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this should be below all the other conditions in this block, since --cpu and --macos_cpus should take precedence over this logic

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I tried moving it below the cpu and macos_cpu options and both failed

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Doesn't this order mean users couldn't cross compile things then for darwin_arm64?

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@alexbeattie42 alexbeattie42 May 5, 2023 •
edited

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I'm not able to test darwin_arm64 since I don't have an apple silicone mac, but I think it's host cpu value should report as darwin_arm64 so it would not match darwin.

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right but if you are on your intel mac, where the host_cpu is darwin, and you pass --cpu=darwin_arm64 to produce an output for an arm64 mac, i think this condition would take precedence

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@alexbeattie42 alexbeattie42 May 9, 2023 •
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I can confirm that this change does break apple silicone mac. I'm also facing another problem with building on apple silicone. Is there a better approach that could be used to solve this problem without breaking things for the above conditions?

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you'd probably need to check the times we return darwin_x86_64 and return darwin in the case that the host CPU is just darwin, and not affect the return value otherwise

if cpu:
return "darwin_{}".format(cpu)
macos_cpus = settings["//command_line_option:macos_cpus"]
Expand Down Expand Up @@ -342,6 +345,7 @@ _apple_rule_common_transition_inputs = [
"//command_line_option:apple_crosstool_top",
]
_apple_rule_base_transition_inputs = _apple_rule_common_transition_inputs + [
"//command_line_option:host_cpu",
"//command_line_option:cpu",
"//command_line_option:ios_multi_cpus",
"//command_line_option:macos_cpus",
Expand Down