benchmark/bindings/python/nanobind.BUILD
Nicholas Junge b219e18b91
[bindings] Add LTO builds on Windows+MSVC (#1687)
* Add LTO builds on Windows+MSVC

Gates the MSVC switches behind an `@bazel_skylib:selects` statement.

This is a first experiment from best guesses and studying the MSVC docs.

* Fix misleading inline comment
2023-10-27 12:49:43 +01:00

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licenses(["notice"])
package(default_visibility = ["//visibility:public"])
load("@bazel_skylib//lib:selects.bzl", "selects")
config_setting(
name = "msvc_compiler",
flag_values = {"@bazel_tools//tools/cpp:compiler": "msvc-cl"},
)
selects.config_setting_group(
name = "winplusmsvc",
match_all = [
"@platforms//os:windows",
":msvc_compiler",
],
)
cc_library(
name = "nanobind",
srcs = glob([
"src/*.cpp",
]),
additional_linker_inputs = select({
"@platforms//os:macos": [":cmake/darwin-ld-cpython.sym"],
"//conditions:default": [],
}),
copts = select({
":msvc_compiler": [
"/EHsc", # exceptions
"/Os", # size optimizations
"/GL", # LTO / whole program optimization
],
# these should work on both clang and gcc.
"//conditions:default": [
"-fexceptions",
"-flto",
"-Os",
],
}),
includes = [
"ext/robin_map/include",
"include",
],
linkopts = select({
":winplusmsvc": ["/LTGC"], # Windows + MSVC.
"@platforms//os:macos": ["-Wl,@$(location :cmake/darwin-ld-cpython.sym)"], # Apple.
"//conditions:default": [],
}),
textual_hdrs = glob(
[
"include/**/*.h",
"src/*.h",
"ext/robin_map/include/tsl/*.h",
],
),
deps = ["@python_headers"],
)