--- a/cargo/private/cargo_build_script.bzl
+++ b/cargo/private/cargo_build_script.bzl
@@ -3,6 +3,7 @@
 load("@apple_support//lib:apple_support.bzl", "apple_support")
 load("@bazel_skylib//lib:paths.bzl", "paths")
 load("@bazel_skylib//rules:common_settings.bzl", "BuildSettingInfo")
+load("@platforms//host:constraints.bzl", "HOST_CONSTRAINTS")
 load("@rules_cc//cc:action_names.bzl", "ACTION_NAMES")
 load("@rules_cc//cc/common:cc_common.bzl", "cc_common")
 load("//rust:defs.bzl", "rust_common")
@@ -11,6 +12,7 @@
 # buildifier: disable=bzl-visibility
 load(
     "//rust/private:rustc.bzl",
+    "collect_extra_rustc_flags",
     "get_compilation_mode_opts",
     "get_linker_and_args",
 )
@@ -23,6 +25,7 @@
     "expand_dict_value_locations",
     "find_cc_toolchain",
     "find_toolchain",
+    "is_exec_configuration",
     _name_to_crate_name = "name_to_crate_name",
 )

@@ -66,6 +69,43 @@
     },
     executable = True,
 )
+
+def _release_user_opts(ctx, flags):
+    # Bazel 9.2's default exec transition appends -g0 to host copts/cxxopts on
+    # non-Windows servers. Remove only that suffix; preserve explicit -g0.
+    # https://github.com/bazelbuild/bazel/blob/9.2.0/src/main/starlark/builtins_bzl/common/builtin_exec_platforms.bzl
+    if is_exec_configuration(ctx) and "@platforms//os:windows" not in HOST_CONSTRAINTS and flags and flags[-1] == "-g0":
+        return flags[:-1]
+    return flags
+
+def _cargo_profile_native_flags(flags):
+    # Let cc-rs/cmake derive optimization and debug info from Cargo's profile.
+    # Filter toolchain defaults only; explicit user flags are appended afterwards.
+    profile_defaults = [
+        "-O0",
+        "-O1",
+        "-O2",
+        "-O3",
+        "-Og",
+        "-Os",
+        "-Oz",
+        "-Ofast",
+        "-g0",
+        "-DNDEBUG",
+        "-DNDEBUG=1",
+        "/Od",
+        "/O1",
+        "/O2",
+        "/Ox",
+        "/Ob0",
+        "/Ob1",
+        "/Ob2",
+        "/Ob3",
+        "/Oi",
+        "/DNDEBUG",
+        "/DNDEBUG=1",
+    ]
+    return [flag for flag in flags if flag not in profile_defaults]

 def get_cc_compile_args_and_env(cc_toolchain, feature_configuration):
     """Gather cc environment variables from the given `cc_toolchain`
@@ -469,6 +509,22 @@
         env["CARGO_PKG_VERSION_PRE"] = patch[1] if len(patch) > 1 else ""
         env["CARGO_PKG_VERSION"] = ctx.attr.version

+    cargo_release_profile = _feature_enabled(ctx, "cargo-release-profile")
+    if cargo_release_profile:
+        # Compatibility with Cargo release profiles that retain debug info:
+        # DEBUG describes symbol generation, not debug assertions. Read the
+        # consuming crate's configuration, not the build-script executable's.
+        debug_info = get_compilation_mode_opts(ctx, toolchain).debug_info
+        flags = collect_extra_rustc_flags(ctx, toolchain, None, "rlib")
+        for flag in flags:
+            # Accept both -Copt-level=N and the split -C opt-level=N spelling.
+            codegen = flag.removeprefix("-C").removeprefix("--codegen=")
+            if codegen.startswith("opt-level="):
+                env["OPT_LEVEL"] = codegen.removeprefix("opt-level=")
+            elif codegen.startswith("debuginfo="):
+                debug_info = codegen.removeprefix("debuginfo=")
+        env["DEBUG"] = "false" if debug_info in ["0", "none"] else "true"
+
     # Pull in env vars which may be required for the cc_toolchain to work (e.g. on OSX, the SDK version).
     # We hope that the linker env is sufficient for the whole cc_toolchain.
     cc_toolchain, feature_configuration = find_cc_toolchain(ctx)
@@ -484,6 +540,13 @@
     if cc_toolchain:
         # MSVC requires INCLUDE to be set
         cc_c_args, cc_cxx_args, cc_env = get_cc_compile_args_and_env(cc_toolchain, feature_configuration)
+        if cargo_release_profile:
+            # Preserve SDK, ABI, CRT and security options. User copts and crate
+            # build_script_env overrides retain precedence over these defaults.
+            copts = _release_user_opts(ctx, ctx.fragments.cpp.copts)
+            cxxopts = _release_user_opts(ctx, ctx.fragments.cpp.cxxopts)
+            cc_c_args = _cargo_profile_native_flags(cc_c_args) + copts + ctx.fragments.cpp.conlyopts
+            cc_cxx_args = _cargo_profile_native_flags(cc_cxx_args) + copts + cxxopts
         include = cc_env.get("INCLUDE")
         if include:
             if toolchain.exec_triple.str.find("windows") > 0:
@@ -837,6 +900,10 @@
         "_cargo_manifest_dir_filename_suffixes_to_retain": attr.label(
             default = Label("//cargo/settings:cargo_manifest_dir_filename_suffixes_to_retain"),
         ),
+        "_extra_exec_rustc_flag": attr.label(default = Label("//rust/settings:extra_exec_rustc_flag")),
+        "_extra_exec_rustc_flags": attr.label(default = Label("//rust/settings:extra_exec_rustc_flags")),
+        "_extra_rustc_flag": attr.label(default = Label("//rust/settings:extra_rustc_flag")),
+        "_extra_rustc_flags": attr.label(default = Label("//rust/settings:extra_rustc_flags")),
         "_debug_std_streams_output_group": attr.label(
             default = Label("//cargo/settings:debug_std_streams_output_group"),
         ),