diff --git a/.bazelrc b/.bazelrc
index 0d3224921..18b8d185a 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -24,6 +24,13 @@ build:linux --copt='-Wno-sign-compare'
 build:macos --copt='-Wno-sign-compare'
 build:freebsd --copt='-Wno-sign-compare'
 
+# disable spurious warnings from gcc
+build:linux --copt='-Wno-unused-but-set-parameter'
+build:linux --copt='-Wno-maybe-uninitialized'
+
+# disable warnings from clang about unknown warnings
+build:linux --copt='-Wno-unknown-warning-option'
+
 # Windows 10 RS1 required for rename/delete with POSIX semantics
 build:windows --copt=-D_WIN32_WINNT=0x0A000002
 
diff --git a/external.bzl b/external.bzl
index 388543aee..4f26496f4 100644
--- a/external.bzl
+++ b/external.bzl
@@ -12,76 +12,9 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
-
-# Third-party repositories
-load("//third_party:jpeg/workspace.bzl", repo_jpeg = "repo")
-load("//third_party:com_google_absl/workspace.bzl", repo_com_google_absl = "repo")
-load("//third_party:com_google_re2/workspace.bzl", repo_com_google_re2 = "repo")
-load("//third_party:com_google_googletest/workspace.bzl", repo_com_google_googletest = "repo")
-load("//third_party:com_google_brotli/workspace.bzl", repo_com_google_brotli = "repo")
-load("//third_party:com_google_benchmark/workspace.bzl", repo_com_google_benchmark = "repo")
-load("//third_party:net_zlib/workspace.bzl", repo_net_zlib = "repo")
-load("//third_party:org_sourceware_bzip2/workspace.bzl", repo_org_sourceware_bzip2 = "repo")
-load("//third_party:com_google_snappy/workspace.bzl", repo_com_google_snappy = "repo")
-load("//third_party:com_github_nlohmann_json/workspace.bzl", repo_com_github_nlohmann_json = "repo")
-load("//third_party:net_sourceforge_half/workspace.bzl", repo_net_sourceforge_half = "repo")
-load("//third_party:org_nghttp2/workspace.bzl", repo_org_nghttp2 = "repo")
-load("//third_party:se_curl/workspace.bzl", repo_se_curl = "repo")
-load("//third_party:com_google_boringssl/workspace.bzl", repo_com_google_boringssl = "repo")
-load("//third_party:org_lz4/workspace.bzl", repo_org_lz4 = "repo")
-load("//third_party:com_facebook_zstd/workspace.bzl", repo_com_facebook_zstd = "repo")
-load("//third_party:org_blosc_cblosc/workspace.bzl", repo_org_blosc_cblosc = "repo")
-load("//third_party:nasm/workspace.bzl", repo_nasm = "repo")
-load("//third_party:org_tukaani_xz/workspace.bzl", repo_org_tukaani_xz = "repo")
+load("//third_party:third_party.bzl", "third_party_dependencies")
 load("//third_party:python/python_configure.bzl", "python_configure")
-load("//third_party:com_github_pybind_pybind11/workspace.bzl", repo_com_github_pybind_pybind11 = "repo")
-load("//third_party:pypa/workspace.bzl", repo_pypa = "repo")
-
-def _bazel_dependencies():
-    maybe(
-        http_archive,
-        name = "bazel_skylib",
-        urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/1.0.3/bazel-skylib-1.0.3.tar.gz"],
-        sha256 = "1c531376ac7e5a180e0237938a2536de0c54d93f5c278634818e0efc952dd56c",
-    )
-
-    # Needed to build documentation
-    maybe(
-        http_archive,
-        name = "build_bazel_rules_nodejs",
-        sha256 = "f533eeefc8fe1ddfe93652ec50f82373d0c431f7faabd5e6323f6903195ef227",
-        urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/3.3.0/rules_nodejs-3.3.0.tar.gz"],
-    )
-
-def _python_dependencies():
-    python_configure(name = "local_config_python")
-    repo_com_github_pybind_pybind11()
-    repo_pypa()
-
-def _cc_dependencies():
-    repo_com_google_absl()
-    repo_com_google_googletest()
-    repo_com_google_re2()
-    repo_com_google_brotli()
-    repo_com_google_benchmark()
-    repo_nasm()
-    repo_jpeg()
-    repo_com_google_boringssl()
-    repo_net_zlib()
-    repo_org_sourceware_bzip2()
-    repo_com_google_snappy()
-    repo_com_github_nlohmann_json()
-    repo_net_sourceforge_half()
-    repo_org_nghttp2()
-    repo_se_curl()
-    repo_org_lz4()
-    repo_com_facebook_zstd()
-    repo_org_blosc_cblosc()
-    repo_org_tukaani_xz()
 
 def tensorstore_dependencies():
-    _bazel_dependencies()
-    _cc_dependencies()
-    _python_dependencies()
+    python_configure(name = "local_config_python")
+    third_party_dependencies()
diff --git a/tensorstore/internal/json_tuple.h b/tensorstore/internal/json_tuple.h
index 256e835c2..5d3ee3d38 100644
--- a/tensorstore/internal/json_tuple.h
+++ b/tensorstore/internal/json_tuple.h
@@ -158,12 +158,14 @@ constexpr auto HeterogeneousArray(ElementBinder... element_binder) {
                                      is_loading, j, sizeof...(ElementBinder)));
     absl::Status status;
     size_t i = 0;
-    (((status = element_binder(is_loading, options, obj, &(*array_ptr)[i++]))
-          .ok() ||
-      ((status = internal_json::MaybeAnnotateArrayElementError(status, i - 1,
-                                                               is_loading)),
-       false)) &&
-     ...);
+    [[maybe_unused]] bool ok =
+        (((status =
+               element_binder(is_loading, options, obj, &(*array_ptr)[i++]))
+              .ok() ||
+          ((status = internal_json::MaybeAnnotateArrayElementError(
+                status, i - 1, is_loading)),
+           false)) &&
+         ...);
     return status;
   };
 }
diff --git a/third_party/bazel_skylib/workspace.bzl b/third_party/bazel_skylib/workspace.bzl
new file mode 100644
index 000000000..30e88dc48
--- /dev/null
+++ b/third_party/bazel_skylib/workspace.bzl
@@ -0,0 +1,24 @@
+# Copyright 2021 The TensorStore Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+def repo():
+    maybe(
+        http_archive,
+        name = "bazel_skylib",
+        urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/1.0.3/bazel-skylib-1.0.3.tar.gz"],
+        sha256 = "1c531376ac7e5a180e0237938a2536de0c54d93f5c278634818e0efc952dd56c",
+    )
diff --git a/third_party/build_bazel_rules_nodejs/workspace.bzl b/third_party/build_bazel_rules_nodejs/workspace.bzl
new file mode 100644
index 000000000..5f4b927d3
--- /dev/null
+++ b/third_party/build_bazel_rules_nodejs/workspace.bzl
@@ -0,0 +1,24 @@
+# Copyright 2021 The TensorStore Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+def repo():
+    maybe(
+        http_archive,
+        name = "build_bazel_rules_nodejs",
+        sha256 = "f533eeefc8fe1ddfe93652ec50f82373d0c431f7faabd5e6323f6903195ef227",
+        urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/3.3.0/rules_nodejs-3.3.0.tar.gz"],
+    )
diff --git a/third_party/com_google_absl/workspace.bzl b/third_party/com_google_absl/workspace.bzl
index b013b71c6..79b465340 100644
--- a/third_party/com_google_absl/workspace.bzl
+++ b/third_party/com_google_absl/workspace.bzl
@@ -22,9 +22,9 @@ def repo():
     maybe(
         third_party_http_archive,
         name = "com_google_absl",
-        sha256 = "b54c84452fc0786c1763eeb1a8d999272f0ecc9ec4ee74eb6cfe0a61adb6aa1c",
-        strip_prefix = "abseil-cpp-62ce712ecc887f669610a93efe18abecf70b47a0",
+        sha256 = "cda0ac8640183d1f1de3632354dd6a4dcfe2548d1aa66f3f099fd6b626c77f54",
+        strip_prefix = "abseil-cpp-b699707f0bfeae034e36cdfd909b66b0fcab696c",
         urls = [
-            "https://github.com/abseil/abseil-cpp/archive/62ce712ecc887f669610a93efe18abecf70b47a0.tar.gz",  # master(2021-01-09)
+            "https://github.com/abseil/abseil-cpp/archive/b699707f0bfeae034e36cdfd909b66b0fcab696c.tar.gz",  # master(2021-08-12)
         ],
     )
diff --git a/third_party/com_google_boringssl/workspace.bzl b/third_party/com_google_boringssl/workspace.bzl
index d1cdd1788..8bc2998f1 100644
--- a/third_party/com_google_boringssl/workspace.bzl
+++ b/third_party/com_google_boringssl/workspace.bzl
@@ -23,10 +23,10 @@ def repo():
         third_party_http_archive,
         name = "com_google_boringssl",
         urls = [
-            "https://github.com/google/boringssl/archive/bdbe37905216bea8dd4d0fdee93f6ee415d3aa15.tar.gz",  # master-with-bazel(2021-01-09)
+            "https://github.com/google/boringssl/archive/fc44652a42b396e1645d5e72aba053349992136a.tar.gz",  # master-with-bazel(2021-08-12)
         ],
-        sha256 = "ce183cb587c0a0f5982e441dff91cb5456d4c85cfa3fb12816e7a93f20645e51",
-        strip_prefix = "boringssl-bdbe37905216bea8dd4d0fdee93f6ee415d3aa15",
+        sha256 = "6f640262999cd1fb33cf705922e453e835d2d20f3f06fe0d77f6426c19257308",
+        strip_prefix = "boringssl-fc44652a42b396e1645d5e72aba053349992136a",
         system_build_file = Label("//third_party:com_google_boringssl/system.BUILD.bazel"),
         patches = [
             # boringssl sets -Werror by default.  That makes the build fragile
diff --git a/third_party/jpeg/bundled.BUILD.bazel b/third_party/jpeg/bundled.BUILD.bazel
index 84b74b541..7c11ee381 100644
--- a/third_party/jpeg/bundled.BUILD.bazel
+++ b/third_party/jpeg/bundled.BUILD.bazel
@@ -5,20 +5,13 @@ licenses(["notice"])
 exports_files(["LICENSE.md"])
 
 WIN_COPTS = [
-    "/Ox",
     "-DWITH_SIMD",
     "-wd4996",
 ]
 
 libjpegturbo_copts = select({
-    ":android": [
-        "-O2",
-        "-fPIE",
-        "-w",
-    ],
     ":windows": WIN_COPTS,
     "//conditions:default": [
-        "-O3",
         "-w",
     ],
 }) + select({
diff --git a/third_party/third_party.bzl b/third_party/third_party.bzl
new file mode 100644
index 000000000..3408c4e7f
--- /dev/null
+++ b/third_party/third_party.bzl
@@ -0,0 +1,48 @@
+load("//third_party:bazel_skylib/workspace.bzl", repo_bazel_skylib = "repo")
+load("//third_party:build_bazel_rules_nodejs/workspace.bzl", repo_build_bazel_rules_nodejs = "repo")
+load("//third_party:com_facebook_zstd/workspace.bzl", repo_com_facebook_zstd = "repo")
+load("//third_party:com_github_nlohmann_json/workspace.bzl", repo_com_github_nlohmann_json = "repo")
+load("//third_party:com_github_pybind_pybind11/workspace.bzl", repo_com_github_pybind_pybind11 = "repo")
+load("//third_party:com_google_absl/workspace.bzl", repo_com_google_absl = "repo")
+load("//third_party:com_google_benchmark/workspace.bzl", repo_com_google_benchmark = "repo")
+load("//third_party:com_google_boringssl/workspace.bzl", repo_com_google_boringssl = "repo")
+load("//third_party:com_google_brotli/workspace.bzl", repo_com_google_brotli = "repo")
+load("//third_party:com_google_googletest/workspace.bzl", repo_com_google_googletest = "repo")
+load("//third_party:com_google_re2/workspace.bzl", repo_com_google_re2 = "repo")
+load("//third_party:com_google_snappy/workspace.bzl", repo_com_google_snappy = "repo")
+load("//third_party:jpeg/workspace.bzl", repo_jpeg = "repo")
+load("//third_party:nasm/workspace.bzl", repo_nasm = "repo")
+load("//third_party:net_sourceforge_half/workspace.bzl", repo_net_sourceforge_half = "repo")
+load("//third_party:net_zlib/workspace.bzl", repo_net_zlib = "repo")
+load("//third_party:org_blosc_cblosc/workspace.bzl", repo_org_blosc_cblosc = "repo")
+load("//third_party:org_lz4/workspace.bzl", repo_org_lz4 = "repo")
+load("//third_party:org_nghttp2/workspace.bzl", repo_org_nghttp2 = "repo")
+load("//third_party:org_sourceware_bzip2/workspace.bzl", repo_org_sourceware_bzip2 = "repo")
+load("//third_party:org_tukaani_xz/workspace.bzl", repo_org_tukaani_xz = "repo")
+load("//third_party:pypa/workspace.bzl", repo_pypa = "repo")
+load("//third_party:se_curl/workspace.bzl", repo_se_curl = "repo")
+
+def third_party_dependencies():
+    repo_bazel_skylib()
+    repo_build_bazel_rules_nodejs()
+    repo_com_facebook_zstd()
+    repo_com_github_nlohmann_json()
+    repo_com_github_pybind_pybind11()
+    repo_com_google_absl()
+    repo_com_google_benchmark()
+    repo_com_google_boringssl()
+    repo_com_google_brotli()
+    repo_com_google_googletest()
+    repo_com_google_re2()
+    repo_com_google_snappy()
+    repo_jpeg()
+    repo_nasm()
+    repo_net_sourceforge_half()
+    repo_net_zlib()
+    repo_org_blosc_cblosc()
+    repo_org_lz4()
+    repo_org_nghttp2()
+    repo_org_sourceware_bzip2()
+    repo_org_tukaani_xz()
+    repo_pypa()
+    repo_se_curl()
diff --git a/third_party/update_third_party_bzl.py b/third_party/update_third_party_bzl.py
new file mode 100755
index 000000000..6e98a0cb6
--- /dev/null
+++ b/third_party/update_third_party_bzl.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+# Copyright 2021 The TensorStore Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Updates third_party.bzl file to import all third-party workspace files."""
+
+import os
+
+
+def main():
+  script_dir = os.path.dirname(__file__)
+
+  deps = []
+  for dep in os.listdir(script_dir):
+    if not os.path.exists(os.path.join(script_dir, dep, 'workspace.bzl')):
+      continue
+    deps.append(dep)
+
+  deps.sort()
+
+  with open(os.path.join(script_dir, 'third_party.bzl'), 'w') as f:
+    for dep in deps:
+      f.write(
+          f'load("//third_party:{dep}/workspace.bzl", repo_{dep} = "repo")\n')
+    f.write('\n')
+    f.write('def third_party_dependencies():\n')
+    for dep in deps:
+      f.write(f'    repo_{dep}()\n')
+
+
+if __name__ == '__main__':
+  main()
diff --git a/third_party/update_versions.py b/third_party/update_versions.py
old mode 100644
new mode 100755
index 2dc5f2f74..dcaa866b4
--- a/third_party/update_versions.py
+++ b/third_party/update_versions.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # Copyright 2021 The TensorStore Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");