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[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
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@ -2,11 +2,21 @@ licenses(["notice"])
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package(default_visibility = ["//visibility:public"])
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load("@bazel_skylib//lib:selects.bzl", "selects")
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config_setting(
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name = "msvc_compiler",
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flag_values = {"@bazel_tools//tools/cpp:compiler": "msvc-cl"},
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)
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selects.config_setting_group(
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name = "winplusmsvc",
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match_all = [
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"@platforms//os:windows",
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":msvc_compiler",
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],
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)
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cc_library(
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name = "nanobind",
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srcs = glob([
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@ -20,6 +30,7 @@ cc_library(
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":msvc_compiler": [
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"/EHsc", # exceptions
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"/Os", # size optimizations
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"/GL", # LTO / whole program optimization
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],
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# these should work on both clang and gcc.
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"//conditions:default": [
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@ -33,7 +44,8 @@ cc_library(
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"include",
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],
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linkopts = select({
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"@platforms//os:macos": ["-Wl,@$(location :cmake/darwin-ld-cpython.sym)"],
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":winplusmsvc": ["/LTGC"], # Windows + MSVC.
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"@platforms//os:macos": ["-Wl,@$(location :cmake/darwin-ld-cpython.sym)"], # Apple.
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"//conditions:default": [],
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}),
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textual_hdrs = glob(
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