Try to setup Linux build.

.bazelrc

@@ -1,3 +1,6 @@
 build --strategy=ObjcLink=standalone
 build --disk_cache=/tmp/bazel
 build --swiftcopt=-whole-module-optimization
+
+try-import clang.bazelrc
+

BUILD

@@ -3,11 +3,11 @@ licenses(["notice"])
 load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
 
 package(
-    default_visibility = ["//visibility:public"],
+  default_visibility = ["//visibility:public"],
 )
 
 exports_files([
-    "LICENSE",
+  "LICENSE",
 ])
 
 swift_library(

bazel/setup_clang.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+BAZELRC_FILE="${BAZELRC_FILE:-$(bazel info workspace)/clang.bazelrc}"
+
+LLVM_PREFIX=$1
+
+if [[ ! -e "${LLVM_PREFIX}/bin/llvm-config" ]]; then
+  echo "Error: cannot find llvm-config in ${LLVM_PREFIX}."
+  exit 1
+fi
+
+export PATH="$(${LLVM_PREFIX}/bin/llvm-config --bindir):${PATH}"
+
+RT_LIBRARY_PATH="$(dirname $(find $(llvm-config --libdir) -name libclang_rt.ubsan_standalone_cxx-x86_64.a | head -1))"
+
+echo "# Generated file, do not edit. If you want to disable clang, just delete this file.
+build:clang --action_env='PATH=${PATH}'
+build:clang --action_env=CC=clang
+build:clang --action_env=CXX=clang++
+build:clang --action_env='LLVM_CONFIG=${LLVM_PREFIX}/bin/llvm-config'
+build:clang --repo_env='LLVM_CONFIG=${LLVM_PREFIX}/bin/llvm-config'
+build:clang --linkopt='-L$(llvm-config --libdir)'
+build:clang --linkopt='-Wl,-rpath,$(llvm-config --libdir)'
+
+build:clang-asan --action_env=ENVOY_UBSAN_VPTR=1
+build:clang-asan --copt=-fsanitize=vptr,function
+build:clang-asan --linkopt=-fsanitize=vptr,function
+build:clang-asan --linkopt='-L${RT_LIBRARY_PATH}'
+build:clang-asan --linkopt=-l:libclang_rt.ubsan_standalone-x86_64.a
+build:clang-asan --linkopt=-l:libclang_rt.ubsan_standalone_cxx-x86_64.a
+" > ${BAZELRC_FILE}
+

external/swift-atomics.BUILD

@@ -4,12 +4,11 @@ package(
   default_visibility = ["//visibility:public"],
 )
 
-objc_library(
+cc_library(
   name = "_AtomicsShims",
   hdrs = ["Sources/_AtomicsShims/include/_AtomicsShims.h"],
   srcs = ["Sources/_AtomicsShims/src/_AtomicsShims.c"],
-  enable_modules = 1,
-  module_name = "_AtomicsShims",
+  tags = ["swift_module=_AtomicsShims"],
   includes = [
     "Sources/_AtomicsShims/include/"
   ]

src/BUILD

@@ -1,8 +1,7 @@
-objc_library(
+cc_library(
   name = "SQLiteDflatObjC",
   hdrs = ["sqlite/include/Bridge.h"],
-  enable_modules = True,
-  module_name = "SQLiteDflatObjC",
+  tags = ["swift_module=SQLiteDflatObjC"],
   visibility = ["//:__pkg__"]
 )
 

src/Publisher.swift

@@ -1,3 +1,4 @@
+#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
 import Combine
 
 @available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
@@ -61,3 +62,5 @@ open class QueryPublisherBuilder<Element: Atom> where Element: Equatable {
     fatalError()
   }
 }
+
+#endif

src/Workspace.swift

@@ -90,6 +90,7 @@ public protocol Workspace: Queryable {
    *            automatically.
    */
   func subscribe<Element: Atom>(object: Element, changeHandler: @escaping (_: SubscribedObject<Element>) -> Void) -> Subscription where Element: Equatable
+#if os(macOS) || os(iOS) || os(watchOS) || os(tvOS)
   // MARK - Combine-compliant
   /**
    * Return a publisher for object subscription in Combine.
@@ -106,6 +107,7 @@ public protocol Workspace: Queryable {
    */
   @available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
   func publisher<Element: Atom>(for: Element.Type) -> QueryPublisherBuilder<Element> where Element: Equatable
+#endif
 }
 
 public extension Workspace {