Merge #20419: build: set minimum supported macOS to 10.14

a52ecc9 build: set minimum supported macOS to 10.14 (fanquake)

Pull request description:

  This is a requirement for C++17 support. See my comments [here](bitcoin/bitcoin#16684 (comment)):

  > You cannot use std::get with std::variant on macOS < 10.14, because Apples libc++ doesn't support the std::bad_variant_access exception. [Relevant comment](bitcoin/bitcoin#19183 (comment)) in #19183.

  > While we could work around this in our own code, using std::get_if, this would still be a problem for 3rd-party dependencies.

  > I've been testing Qt 5.15LTS (we'll have to enable C++17 in qt, and may upgrade to a newer version at the same time), and you can't enable -std c++17, while targeting a macOS deployment version < 10.14, configuring will fail. They are making use of std::get with std::variant throughout their cocoa code.

  We would have to had to have bumped to at least 10.13 in any case, as Qt 5.15 (#19716) [requires 10.13+](https://doc.qt.io/qt-5/supported-platforms.html).

ACKs for top commit:
  hebasto:
    ACK a52ecc9, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: f669b2fc777aeea1e9afdbbc7bd9afe3997418211db6ba53c934cae0e62a9b999603da539518c229f34961d275c9e2f315c7b022cf5fb97bd201a69c85d470cc

.cirrus.yml

@@ -122,7 +122,7 @@ task:
     FILE_ENV: "./ci/test/00_setup_env_native_multiprocess.sh"
 
 task:
-  name: 'macOS 10.12  [GOAL: deploy] [no functional tests]'
+  name: 'macOS 10.14  [GOAL: deploy] [no functional tests]'
   << : *GLOBAL_TASK_TEMPLATE
   container:
     image: ubuntu:bionic

ci/test/00_setup_env_mac.sh

@@ -8,7 +8,7 @@ export LC_ALL=C.UTF-8
 
 export CONTAINER_NAME=ci_macos_cross
 export DOCKER_NAME_TAG=ubuntu:18.04  # Check that bionic can cross-compile to macos (bionic is used in the gitian build as well)
-export HOST=x86_64-apple-darwin16
+export HOST=x86_64-apple-darwin18
 export PACKAGES="cmake imagemagick libcap-dev librsvg2-bin libz-dev libbz2-dev libtiff-tools python3-dev python3-setuptools"
 export XCODE_VERSION=11.3.1
 export XCODE_BUILD_ID=11C505

ci/test/00_setup_env_mac_host.sh

@@ -6,7 +6,7 @@
 
 export LC_ALL=C.UTF-8
 
-export HOST=x86_64-apple-darwin16
+export HOST=x86_64-apple-darwin18
 export PIP_PACKAGES="zmq"
 export GOAL="install"
 export BITCOIN_CONFIG="--with-gui --enable-reduce-exports --enable-werror --with-boost-process"

contrib/gitian-descriptors/gitian-osx.yml

@@ -37,7 +37,7 @@ script: |
   set -e -o pipefail
 
   WRAP_DIR=$HOME/wrapped
-  HOSTS="x86_64-apple-darwin16"
+  HOSTS="x86_64-apple-darwin18"
   CONFIGFLAGS="--enable-reduce-exports --disable-bench --disable-gui-tests GENISOIMAGE=$WRAP_DIR/genisoimage"
   FAKETIME_HOST_PROGS=""
   FAKETIME_PROGS="ar ranlib date dmg genisoimage"

depends/README.md

@@ -25,7 +25,7 @@ Common `host-platform-triplets` for cross compilation are:
 - `i686-pc-linux-gnu` for Linux 32 bit
 - `x86_64-pc-linux-gnu` for x86 Linux
 - `x86_64-w64-mingw32` for Win64
-- `x86_64-apple-darwin16` for macOS
+- `x86_64-apple-darwin18` for macOS
 - `arm-linux-gnueabihf` for Linux ARM 32 bit
 - `aarch64-linux-gnu` for Linux ARM 64 bit
 - `powerpc64-linux-gnu` for Linux POWER 64-bit (big endian)

depends/hosts/darwin.mk

@@ -1,4 +1,4 @@
-OSX_MIN_VERSION=10.12
+OSX_MIN_VERSION=10.14
 OSX_SDK_VERSION=10.15.1
 XCODE_VERSION=11.3.1
 XCODE_BUILD_ID=11C505

doc/build-osx.md

@@ -111,6 +111,6 @@ tail -f $HOME/Library/Application\ Support/Bitcoin/debug.log
 ```
 
 ## Notes
-* Tested on OS X 10.12 Sierra through macOS 10.15 Catalina on 64-bit Intel
+* Tested on OS X 10.14 Mojave through macOS 11 Big Sur on 64-bit Intel
 processors only.
 * Building with downloaded Qt binaries is not officially supported. See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714).

doc/release-notes.md

@@ -46,12 +46,12 @@ Compatibility
 ==============
 
 Bitcoin Core is supported and extensively tested on operating systems
-using the Linux kernel, macOS 10.12+, and Windows 7 and newer.  Bitcoin
+using the Linux kernel, macOS 10.14+, and Windows 7 and newer.  Bitcoin
 Core should also work on most other Unix-like systems but is not as
 frequently tested on them.  It is not recommended to use Bitcoin Core on
 unsupported systems.
 
-From Bitcoin Core 0.20.0 onwards, macOS versions earlier than 10.12 are no
+From Bitcoin Core 0.22.0 onwards, macOS versions earlier than 10.14 are no
 longer supported. Additionally, Bitcoin Core does not yet change appearance
 when macOS "dark mode" is activated.
 

share/qt/Info.plist.in

@@ -3,7 +3,7 @@
 <plist version="0.9">
 <dict>
   <key>LSMinimumSystemVersion</key>
-  <string>10.12.0</string>
+  <string>10.14.0</string>
 
   <key>LSArchitecturePriority</key>
   <array>