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load("@rules_cc//cc:defs.bzl", "cc_library")
load("@bazel_skylib//rules:common_settings.bzl", "bool_flag", "string_flag")
package(default_visibility = ["//visibility:public"])
bool_flag(
name = "with_abseil",
build_setting_default = False,
)
CPP_STDLIBS = [
"none",
"best",
"2014",
"2017",
"2020",
"2023",
]
string_flag(
name = "with_cxx_stdlib",
build_setting_default = "best",
values = CPP_STDLIBS,
)
cc_library(
name = "api",
hdrs = glob(["include/**/*.h"]),
defines = select({
":with_external_abseil": ["HAVE_ABSEIL"],
"//conditions:default": [],
}) + select({
":set_cxx_stdlib_none": [],
### automatic selection
":set_cxx_stdlib_best": ["OPENTELEMETRY_STL_VERSION=(__cplusplus/100)"],
# See https://learn.microsoft.com/en-us/cpp/build/reference/zc-cplusplus
":set_cxx_stdlib_best_and_msvc": ["OPENTELEMETRY_STL_VERSION=(_MSVC_LANG/100)"],
### manual selection
":set_cxx_stdlib_2014": ["OPENTELEMETRY_STL_VERSION=2014"],
":set_cxx_stdlib_2017": ["OPENTELEMETRY_STL_VERSION=2017"],
":set_cxx_stdlib_2020": ["OPENTELEMETRY_STL_VERSION=2020"],
":set_cxx_stdlib_2023": ["OPENTELEMETRY_STL_VERSION=2023"],
"//conditions:default": [],
}),
strip_include_prefix = "include",
tags = ["api"],
deps = select({
":with_external_abseil": [
"@com_google_absl//absl/base",
"@com_google_absl//absl/strings",
"@com_google_absl//absl/types:variant",
],
"//conditions:default": [],
}),
)
config_setting(
name = "with_external_abseil",
flag_values = {":with_abseil": "true"},
)
[config_setting(
name = "set_cxx_stdlib_%s" % v,
flag_values = {":with_cxx_stdlib": v},
) for v in CPP_STDLIBS]
config_setting(
name = "set_cxx_stdlib_best_and_msvc",
constraint_values = ["@bazel_tools//tools/cpp:msvc"],
flag_values = {":with_cxx_stdlib": "best"},
)
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