Merge bitcoin/bitcoin#28622: build: use macOS 14 SDK (Xcode 15.0)

8ea45e626e5a0482ee11d4376f961d8126ce7c7b build: use macOS 14 SDK (Xcode 15.0) (fanquake)
51c97ffb6989a4cf56ad966d360a9fa0426e174c build: patch boost process for macOS 14 SDK (fanquake)
423949a13b39a193dff8b2758d23d6691d11dbc3 depends: add -platform_version to macOS build flags (fanquake)

Pull request description:

  This fixes: https://github.com/bitcoin/bitcoin/pull/28349#issuecomment-1748515277 (cross-compiling with C++20 for macOS). See https://developer.apple.com/xcode/cpp/#c++20 for C++20 support in Apples libc++, some features landed with Xcode 14.3, although many more landed with Xcode 15.0.

ACKs for top commit:
  hebasto:
    ACK 8ea45e626e5a0482ee11d4376f961d8126ce7c7b.
  TheCharlatan:
    ACK 8ea45e626e5a0482ee11d4376f961d8126ce7c7b

Tree-SHA512: 274ce2c9b9f8e4d755c07b8d0d4897a7f92708ac64e6afb7a3f75bdb485e863fc7f40badf3a88b129ce36f6cca72f768dc2ed7fba2bdf0bb6da2bf0c8fedee10

7 files changed, 58 insertions, 32 deletions

diff --git a/ci/test/00_setup_env_mac.sh b/ci/test/00_setup_env_mac.sh
index d97a292778..1651c5ec26 100755
--- a/ci/test/00_setup_env_mac.sh
+++ b/ci/test/00_setup_env_mac.sh
@@ -12,8 +12,8 @@ export CONTAINER_NAME=ci_macos_cross
 export CI_IMAGE_NAME_TAG="docker.io/ubuntu:22.04"
 export HOST=x86_64-apple-darwin
 export PACKAGES="cmake zip"
-export XCODE_VERSION=12.2
-export XCODE_BUILD_ID=12B45b
+export XCODE_VERSION=15.0
+export XCODE_BUILD_ID=15A240d
 export RUN_UNIT_TESTS=false
 export RUN_FUNCTIONAL_TESTS=false
 export GOAL="deploy"
diff --git a/contrib/devtools/symbol-check.py b/contrib/devtools/symbol-check.py
index e3e8e398c2..ff1678116d 100755
--- a/contrib/devtools/symbol-check.py
+++ b/contrib/devtools/symbol-check.py
@@ -235,7 +235,7 @@ def check_MACHO_min_os(binary) -> bool:
     return False
 
 def check_MACHO_sdk(binary) -> bool:
-    if binary.build_version.sdk == [11, 0, 0]:
+    if binary.build_version.sdk == [14, 0, 0]:
         return True
     return False
 
diff --git a/contrib/macdeploy/README.md b/contrib/macdeploy/README.md
index 16fb0dad21..ea599df3d8 100644
--- a/contrib/macdeploy/README.md
+++ b/contrib/macdeploy/README.md
@@ -14,51 +14,45 @@ When complete, it will have produced `Bitcoin-Core.zip`.
 
 A free Apple Developer Account is required to proceed.
 
-Our current macOS SDK
-(`Xcode-12.2-12B45b-extracted-SDK-with-libcxx-headers.tar.gz`)
-can be extracted from
-[Xcode_12.2.xip](https://download.developer.apple.com/Developer_Tools/Xcode_12.2/Xcode_12.2.xip).
+Our macOS SDK can be extracted from
+[Xcode_15.xip](https://download.developer.apple.com/Developer_Tools/Xcode_15/Xcode_15.xip).
 
 Alternatively, after logging in to your account go to 'Downloads', then 'More'
-and search for [`Xcode 12.2`](https://developer.apple.com/download/all/?q=Xcode%2012.2).
+and search for [`Xcode 15`](https://developer.apple.com/download/all/?q=Xcode%2015).
 
 An Apple ID and cookies enabled for the hostname are needed to download this.
 
-The `sha256sum` of the downloaded XIP archive should be `28d352f8c14a43d9b8a082ac6338dc173cb153f964c6e8fb6ba389e5be528bd0`.
+The `sha256sum` of the downloaded XIP archive should be `4daaed2ef2253c9661779fa40bfff50655dc7ec45801aba5a39653e7bcdde48e`.
 
-After Xcode version 7.x, Apple started shipping the `Xcode.app` in a `.xip`
-archive. This makes the SDK less-trivial to extract on non-macOS machines. One
-approach (tested on Debian Buster) is outlined below:
+To extract the `.xip` on Linux:
 
 ```bash
 # Install/clone tools needed for extracting Xcode.app
 apt install cpio
 git clone https://github.com/bitcoin-core/apple-sdk-tools.git
 
-# Unpack Xcode_12.2.xip and place the resulting Xcode.app in your current
+# Unpack the .xip and place the resulting Xcode.app in your current
 # working directory
-python3 apple-sdk-tools/extract_xcode.py -f Xcode_12.2.xip | cpio -d -i
+python3 apple-sdk-tools/extract_xcode.py -f Xcode_15.xip | cpio -d -i
 ```
 
-On macOS the process is more straightforward:
+On macOS:
 
 ```bash
-xip -x Xcode_12.2.xip
+xip -x Xcode_15.xip
 ```
 
-### Step 2: Generating `Xcode-12.2-12B45b-extracted-SDK-with-libcxx-headers.tar.gz` from `Xcode.app`
+### Step 2: Generating the SDK tarball from `Xcode.app`
 
-To generate `Xcode-12.2-12B45b-extracted-SDK-with-libcxx-headers.tar.gz`, run
-the script [`gen-sdk`](./gen-sdk) with the path to `Xcode.app` (extracted in the
-previous stage) as the first argument.
+To generate the SDK, run the script [`gen-sdk`](./gen-sdk) with the
+path to `Xcode.app` (extracted in the previous stage) as the first argument.
 
 ```bash
-# Generate a Xcode-12.2-12B45b-extracted-SDK-with-libcxx-headers.tar.gz from
-# the supplied Xcode.app
 ./contrib/macdeploy/gen-sdk '/path/to/Xcode.app'
 ```
 
-The `sha256sum` of the generated TAR.GZ archive should be `df75d30ecafc429e905134333aeae56ac65fac67cb4182622398fd717df77619`.
+The generated archive should be: `Xcode-15.0-15A240d-extracted-SDK-with-libcxx-headers.tar.gz`.
+The `sha256sum` should be `c0c2e7bb92c1fee0c4e9f3a485e4530786732d6c6dd9e9f418c282aa6892f55d`.
 
 ## Deterministic macOS App Notes
 
diff --git a/contrib/macdeploy/gen-sdk b/contrib/macdeploy/gen-sdk
index 6efaaccb8e..b73f5cba14 100755
--- a/contrib/macdeploy/gen-sdk
+++ b/contrib/macdeploy/gen-sdk
@@ -62,9 +62,6 @@ def run():
 
     out_name = "Xcode-{xcode_version}-{xcode_build_id}-extracted-SDK-with-libcxx-headers".format(xcode_version=xcode_version, xcode_build_id=xcode_build_id)
 
-    xcode_libcxx_dir = xcode_app.joinpath("Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1")
-    assert xcode_libcxx_dir.is_dir()
-
     if args.out_sdktgz:
         out_sdktgz_path = pathlib.Path(args.out_sdktgz_path)
     else:
@@ -72,7 +69,7 @@ def run():
         out_sdktgz_path = pathlib.Path("./{}.tar.gz".format(out_name))
 
     def tarfp_add_with_base_change(tarfp, dir_to_add, alt_base_dir):
-        """Add all files in dir_to_add to tarfp, but prepent MEMBERPREFIX to the files'
+        """Add all files in dir_to_add to tarfp, but prepent alt_base_dir to the files'
         names
 
         e.g. if the only file under /root/bazdir is /root/bazdir/qux, invoking:
@@ -107,8 +104,6 @@ def run():
             with tarfile.open(mode="w", fileobj=gzf, format=tarfile.GNU_FORMAT) as tarfp:
                 print("Adding MacOSX SDK {} files...".format(sdk_version))
                 tarfp_add_with_base_change(tarfp, sdk_dir, out_name)
-                print("Adding libc++ headers...")
-                tarfp_add_with_base_change(tarfp, xcode_libcxx_dir, "{}/usr/include/c++/v1".format(out_name))
     print("Done! Find the resulting gzipped tarball at:")
     print(out_sdktgz_path.resolve())
 
diff --git a/depends/hosts/darwin.mk b/depends/hosts/darwin.mk
index ecd45540cf..a89c82e408 100644
--- a/depends/hosts/darwin.mk
+++ b/depends/hosts/darwin.mk
@@ -1,7 +1,7 @@
 OSX_MIN_VERSION=11.0
-OSX_SDK_VERSION=11.0
-XCODE_VERSION=12.2
-XCODE_BUILD_ID=12B45b
+OSX_SDK_VERSION=14.0
+XCODE_VERSION=15.0
+XCODE_BUILD_ID=15A240d
 LD64_VERSION=711
 
 OSX_SDK=$(SDK_PATH)/Xcode-$(XCODE_VERSION)-$(XCODE_BUILD_ID)-extracted-SDK-with-libcxx-headers
@@ -71,6 +71,10 @@ $(foreach TOOL,$(cctools_TOOLS),$(eval darwin_$(TOOL) = $$(build_prefix)/bin/$$(
 #
 #         Adds the desired paths from the SDK
 #
+#     -platform_version
+#
+#         Indicate to the linker the platform, the oldest supported version,
+#         and the SDK used.
 
 darwin_CC=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
               -u OBJC_INCLUDE_PATH -u OBJCPLUS_INCLUDE_PATH -u CPATH \
@@ -91,6 +95,7 @@ darwin_CXX=env -u C_INCLUDE_PATH -u CPLUS_INCLUDE_PATH \
 
 darwin_CFLAGS=-pipe -std=$(C_STANDARD)
 darwin_CXXFLAGS=-pipe -std=$(CXX_STANDARD)
+darwin_LDFLAGS=-Wl,-platform_version,macos,$(OSX_MIN_VERSION),$(OSX_SDK_VERSION)
 
 ifneq ($(LTO),)
 darwin_CFLAGS += -flto
diff --git a/depends/packages/boost.mk b/depends/packages/boost.mk
index ebc097d686..ab43764b38 100644
--- a/depends/packages/boost.mk
+++ b/depends/packages/boost.mk
@@ -3,6 +3,11 @@ $(package)_version=1.81.0
 $(package)_download_path=https://boostorg.jfrog.io/artifactory/main/release/$($(package)_version)/source/
 $(package)_file_name=boost_$(subst .,_,$($(package)_version)).tar.bz2
 $(package)_sha256_hash=71feeed900fbccca04a3b4f2f84a7c217186f28a940ed8b7ed4725986baf99fa
+$(package)_patches=process_macos_sdk.patch
+
+define $(package)_preprocess_cmds
+  patch -p1 < $($(package)_patch_dir)/process_macos_sdk.patch
+endef
 
 define $(package)_stage_cmds
   mkdir -p $($(package)_staging_prefix_dir)/include && \
diff --git a/depends/patches/boost/process_macos_sdk.patch b/depends/patches/boost/process_macos_sdk.patch
new file mode 100644
index 0000000000..ebc556d972
--- /dev/null
+++ b/depends/patches/boost/process_macos_sdk.patch
@@ -0,0 +1,27 @@
+Fix Boost Process compilation with macOS 14 SDK.
+Can be dropped with Boost 1.84.0.
+https://github.com/boostorg/process/pull/343.
+https://github.com/boostorg/process/issues/342.
+
+diff --git a/boost/process/detail/posix/handles.hpp b/boost/process/detail/posix/handles.hpp
+index cd9e1ce5a..304e77b1c 100644
+--- a/boost/process/detail/posix/handles.hpp
++++ b/boost/process/detail/posix/handles.hpp
+@@ -33,7 +33,7 @@ inline std::vector<native_handle_type> get_handles(std::error_code & ec)
+     else
+         ec.clear();
+ 
+-    auto my_fd = ::dirfd(dir.get());
++    auto my_fd = dirfd(dir.get());
+ 
+     struct ::dirent * ent_p;
+ 
+@@ -117,7 +117,7 @@ struct limit_handles_ : handler_base_ext
+             return;
+         }
+ 
+-        auto my_fd = ::dirfd(dir);
++        auto my_fd = dirfd(dir);
+         struct ::dirent * ent_p;
+ 
+         while ((ent_p = readdir(dir)) != nullptr)