Define TARGET macro the same even when computed goto support is not enabled

[smontanaro]

BPO	44060
Nosy	@smontanaro
PRs	bpo-44060: Enable TARGET labels even when not using computed gotos. #25949

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-05-06.15:09:57.774>
labels = ['interpreter-core', 'type-feature', '3.11']
title = 'Define TARGET macro the same even when computed goto support is not enabled'
updated_at = <Date 2021-05-06.15:49:48.011>
user = 'https://github.com/smontanaro'

bugs.python.org fields:

activity = <Date 2021-05-06.15:49:48.011>
actor = 'skip.montanaro'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Interpreter Core']
creation = <Date 2021-05-06.15:09:57.774>
creator = 'skip.montanaro'
dependencies = []
files = []
hgrepos = []
issue_num = 44060
keywords = ['patch']
message_count = 1.0
messages = ['393099']
nosy_count = 1.0
nosy_names = ['skip.montanaro']
pr_nums = ['25949']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue44060'
versions = ['Python 3.11']

• PR: gh-88226: Emit TARGET labels in Python/ceval.c when debugging, even if computed gotos aren't enabled #98265

[smontanaro]

When the interpreter is compiled with computed goto support, the TARGET macro is defined like this:

#define TARGET(op) op: TARGET_##op

If computed gotos are disabled, the implementation is simpler:

#define TARGET(op) op

I'm finding it useful to use those labels as gdb breakpoint targets. Is there some reason not to always define the TARGET_##op label?