protobuf/build_defs/compiler_config_setting.bzl
David L. Jones 52655b1f5e
[Bazel] Move C++ build-related logic into //build_defs (#9921)
These are all "toolchain-y" things, like copts, link_opts, and config_settings. These are very different from what is in //toolchain, though, so I chose the somewhat common name build_defs for the package. For now, I am only using this package for purely internal things. (Most public "defs"-type things should come from rules_proto/rules_cc, anyhow.)
2022-05-06 12:11:46 -07:00

24 lines
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Python

"""Creates config_setting that allows selecting based on 'compiler' value."""
def create_compiler_config_setting(name, value, visibility = None):
# The "do_not_use_tools_cpp_compiler_present" attribute exists to
# distinguish between older versions of Bazel that do not support
# "@bazel_tools//tools/cpp:compiler" flag_value, and newer ones that do.
# In the future, the only way to select on the compiler will be through
# flag_values{"@bazel_tools//tools/cpp:compiler"} and the else branch can
# be removed.
if hasattr(cc_common, "do_not_use_tools_cpp_compiler_present"):
native.config_setting(
name = name,
flag_values = {
"@bazel_tools//tools/cpp:compiler": value,
},
visibility = visibility,
)
else:
native.config_setting(
name = name,
values = {"compiler": value},
visibility = visibility,
)