SERVER-109242 Add remote linking for compilation of arm64 tasks (#40052)

GitOrigin-RevId: 2a02a96ce187cf37f3073a035cae78d86eaab1db

.bazelrc

@@ -374,6 +374,7 @@ common:remote_link --strategy=CppArchive=remote
 common:remote_link --strategy=SolibSymlink=remote
 common:remote_link --strategy=ExtractDebugInfo=remote
 common:remote_link --strategy=StripDebugInfo=remote
+common:remote_link --//bazel/config:remote_link=True
 common:remote_link --features=-thin_archive
 
 # Coverage

bazel/config/BUILD.bazel

@@ -41,6 +41,7 @@ load(
     "propeller_profile_generate",
     "propeller_profile_use",
     "release",
+    "remote_link",
     "sdkroot",
     "separate_debug",
     "server_js",
@@ -712,6 +713,31 @@ selects.config_setting_group(
     ],
 )
 
+# ==========
+# remote link
+# ==========
+
+remote_link(
+    name = "remote_link",
+    build_setting_default = False,
+)
+
+config_setting(
+    name = "remote_link_enabled",
+    flag_values = {
+        "//bazel/config:remote_link": "True",
+    },
+)
+
+selects.config_setting_group(
+    name = "remote_link_arm_linux_enabled",
+    match_all = [
+        ":remote_link_enabled",
+        "@platforms//cpu:aarch64",
+        "@platforms//os:linux",
+    ],
+)
+
 # --------------------------------------
 # linker options
 # --------------------------------------

bazel/config/configs.bzl

@@ -564,6 +564,19 @@ release = rule(
     build_setting = config.bool(flag = True),
 )
 
+# =========
+# remote link
+# =========
+remote_link_provider = provider(
+    doc = """Enable remote link features.""",
+    fields = ["enabled"],
+)
+
+remote_link = rule(
+    implementation = lambda ctx: remote_link_provider(enabled = ctx.build_setting_value),
+    build_setting = config.bool(flag = True),
+)
+
 # =========
 # dwarf_version
 # =========

bazel/mongo_src_rules.bzl

@@ -792,12 +792,14 @@ def _mongo_cc_binary_and_test(
         "target_compatible_with": target_compatible_with + enterprise_compatible,
         "additional_linker_inputs": additional_linker_inputs + MONGO_GLOBAL_ADDITIONAL_LINKER_INPUTS,
         "exec_properties": exec_properties | select({
-            # Debug compression significantly reduces .o, .dwo, and .a sizes
-            "//bazel/config:compress_debug_compile_enabled": {"cpp_link.coefficient": "18.0"},
-            "//conditions:default": {"cpp_link.coefficient": "3.0"},
+            "//bazel/config:remote_link_enabled": {},
+            "//conditions:default": {"cpp_link.coefficient": "18.0"},
         }) | select({
             "//bazel/config:thin_lto_enabled": {"cpp_link.cpus": str(NUM_CPUS)},
             "//conditions:default": {},
+        }) | select({
+            "//bazel/config:remote_link_arm_linux_enabled": {"cpp_link.Pool": "arm_linker"},
+            "//conditions:default": {},
         }),
         "env": env | SANITIZER_ENV,
     } | kwargs

evergreen/bazel_compile.sh

@@ -95,6 +95,11 @@ if [ "${skip_debug_link}" = "true" ]; then
     export version_id="${version_id}"
     if [ "${task_name}" = "archive_dist_test" ]; then
         task_compile_flags="${task_compile_flags} --simple_build_id=True --linkopt='-Wl,-S' --separate_debug=False"
+        ARCH=$(uname -m)
+        # Remote linking is currently only supported on arm
+        if [[ "$ARCH" == "arm64" || "$ARCH" == "aarch64" ]]; then
+            task_compile_flags="${task_compile_flags} --remote_download_outputs=toplevel --config=remote_link"
+        fi
     fi
     if [ "${task_name}" = "archive_dist_test_debug" ]; then
         task_compile_flags="${task_compile_flags} --simple_build_id=True"