xref: /llvm-project/libcxx/utils/libcxx/test/config.py (revision e236a52a88956968f318fb908c584e5cb80b5b03) 
1# ===----------------------------------------------------------------------===##
2#
3# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4# See https://llvm.org/LICENSE.txt for license information.
5# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6#
7# ===----------------------------------------------------------------------===##
8
9import os
10
11
12def _getSubstitution(substitution, config):
13    for (orig, replacement) in config.substitutions:
14        if orig == substitution:
15            return replacement
16    raise ValueError("Substitution {} is not in the config.".format(substitution))
17
18
19def _appendToSubstitution(substitutions, key, value):
20    return [(k, v + " " + value) if k == key else (k, v) for (k, v) in substitutions]
21
22
23def configure(parameters, features, config, lit_config):
24    note = lambda s: lit_config.note("({}) {}".format(config.name, s))
25    config.environment = dict(os.environ)
26
27    # Apply the actions supplied by parameters to the configuration first, since
28    # parameters are things that we request explicitly and which might influence
29    # what features are implicitly made available next.
30    for param in parameters:
31        actions = param.getActions(config, lit_config.params)
32        for action in actions:
33            action.applyTo(config)
34            if lit_config.debug:
35                note(
36                    "Applied '{}' as a result of parameter '{}'".format(
37                        action.pretty(config, lit_config.params),
38                        param.pretty(config, lit_config.params),
39                    )
40                )
41
42    # Then, apply the automatically-detected features.
43    for feature in features:
44        actions = feature.getActions(config)
45        for action in actions:
46            action.applyTo(config)
47            if lit_config.debug:
48                note(
49                    "Applied '{}' as a result of implicitly detected feature '{}'".format(
50                        action.pretty(config, lit_config.params), feature.pretty(config)
51                    )
52                )
53
54    # Print the basic substitutions
55    for sub in ("%{cxx}", "%{flags}", "%{compile_flags}", "%{link_flags}", "%{benchmark_flags}", "%{exec}"):
56        note("Using {} substitution: '{}'".format(sub, _getSubstitution(sub, config)))
57
58    # Print all available features
59    note("All available features: {}".format(", ".join(sorted(config.available_features))))
60