xamarin-android repo M1 build support #5518
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jonpryor
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Jan 19, 2021
Fixes: dotnet#5518 Context: https://github.com/xamarin/xamarin-android/projects/16 [Apple announced new Mac hardware][0], which use an [M1 CPU][1], which is an arm64-compatible ABI, *not* intel based. Legacy software built for intel CPUs will still run via the [Rosetta][3] translation environment. Because of Rosetta, existing Xamarin.Android binaries will work as-is on Mac hardware with M1 CPUs. However, what if you want to *build* the xamarin-android repo on an M1 CPU? Previously, that would fail: % make prepare PREPARE_AUTOPROVISION=true … Error: Could not find Homebrew on this system, please install it from https://brew.sh/ Unfortunately, [Homebrew][4] won't install by default: % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" Password: Homebrew is not (yet) supported on ARM processors! Rerun the Homebrew installer under Rosetta 2. If you really know what you are doing and are prepared for a very broken experience you can use another installation option for installing on ARM: https://docs.brew.sh/Installation However, there *is* a way to install Homebrew! You "just" need to "lie" about the processor being used! % arch -arch x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" # works! This works by using the [**arch**(1)][5] command, which allows explicitly specifying (overriding) the CPU environment that the child process runs within. Within `arch -arch x86_64 command`, `command` believes it's running on an x86_64 CPU. Update the Unix `dependencies.md` documentation to document how to install Homebrew on an M1 CPU. Update `xaprepare` so that whenever a `brew` command is executed on an M1 CPU, the command is prefixed with `arch -arch x86_64`. `xaprepare` uses the [`sysctl.proc_translated` system control][6] to determine if it's currently running within a Rosetta environment, so that `arch -arch x86_64` is not used unless required. Finally, *disable* provisioning of the [`xamarin/xamarin-android-windeps/mingw-zlib`][7] tap on M1 devices, as it currently does not build: % arch -arch x86_64 /usr/local/bin/brew "install" "xamarin/xamarin-android-windeps/mingw-zlib" ... ==> make -f win32/Makefile.gcc PREFIX=i686-w64-mingw32- DESTDIR=/usr/local/Cellar/mingw-zlib/1.2.11 BINARY_PATH=/usr/i686-w64-mingw32/lib INCLUDE_ Last 15 lines from /Users/jon/Library/Logs/Homebrew/mingw-zlib/02.usr: with preprocessed source if appropriate. See <https://github.com/Homebrew/homebrew-core/issues> for instructions. make: *** [gzlib.o] Error 4 make: *** Waiting for unfinished jobs.... make: *** [deflate.o] Error 4 make: *** [crc32.o] Error 4 make: *** [compress.o] Error 4 make: *** [adler32.o] Error 4 i686-w64-mingw32-gcc: internal compiler error: Abort trap: 6 signal terminated program cc1 Please submit a full bug report, with preprocessed source if appropriate. See <https://github.com/Homebrew/homebrew-core/issues> for instructions. make: *** [gzclose.o] Error 4 make: *** [gzread.o] Error 4 make: *** [gzwrite.o] Error 4 If reporting this issue please do so at (not Homebrew/brew or Homebrew/core): https://github.com/xamarin/homebrew-xamarin-android-windeps/issues [0]: https://www.apple.com/newsroom/2020/11/introducing-the-next-generation-of-mac/ [1]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [2]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [3]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment [4]: https://brew.sh [5]: https://www.unix.com/man-page/osx/1/arch/ [6]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845 [7]: https://github.com/xamarin/homebrew-xamarin-android-windeps
jonpryor
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Jan 21, 2021
Fixes: dotnet#5518 Context: https://github.com/xamarin/xamarin-android/projects/16 [Apple announced new Mac hardware][0], which use an [M1 CPU][1], which is an arm64-compatible ABI, *not* intel based. Legacy software built for intel CPUs will still run via the [Rosetta][3] translation environment. Because of Rosetta, existing Xamarin.Android binaries will work as-is on Mac hardware with M1 CPUs. However, what if you want to *build* the xamarin-android repo on an M1 CPU? Previously, that would fail: % make prepare PREPARE_AUTOPROVISION=true … Error: Could not find Homebrew on this system, please install it from https://brew.sh/ Unfortunately, [Homebrew][4] won't install by default: % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" Password: Homebrew is not (yet) supported on ARM processors! Rerun the Homebrew installer under Rosetta 2. If you really know what you are doing and are prepared for a very broken experience you can use another installation option for installing on ARM: https://docs.brew.sh/Installation However, there *is* a way to install Homebrew! You "just" need to "lie" about the processor being used! % arch -arch x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" # works! This works by using the [**arch**(1)][5] command, which allows explicitly specifying (overriding) the CPU environment that the child process runs within. Within `arch -arch x86_64 command`, `command` believes it's running on an x86_64 CPU. Update the Unix `dependencies.md` documentation to document how to install Homebrew on an M1 CPU. Update `xaprepare` so that whenever a `brew` command is executed on an M1 CPU, the command is prefixed with `arch -arch x86_64`. `xaprepare` uses the [`sysctl.proc_translated` system control][6] to determine if it's currently running within a Rosetta environment, so that `arch -arch x86_64` is not used unless required. [0]: https://www.apple.com/newsroom/2020/11/introducing-the-next-generation-of-mac/ [1]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [2]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [3]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment [4]: https://brew.sh [5]: https://www.unix.com/man-page/osx/1/arch/ [6]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845
jonpryor
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Jan 22, 2021
Fixes: dotnet#5518 Context: https://github.com/xamarin/xamarin-android/projects/16 [Apple announced new Mac hardware][0], which use an [M1 CPU][1], which is an arm64-compatible ABI, *not* intel based. Legacy software built for intel CPUs will still run via the [Rosetta][3] translation environment. Because of Rosetta, existing Xamarin.Android binaries will work as-is on Mac hardware with M1 CPUs. However, what if you want to *build* the xamarin-android repo on an M1 CPU? Previously, that would fail: % make prepare PREPARE_AUTOPROVISION=true … Error: Could not find Homebrew on this system, please install it from https://brew.sh/ Unfortunately, [Homebrew][4] won't install by default: % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" Password: Homebrew is not (yet) supported on ARM processors! Rerun the Homebrew installer under Rosetta 2. If you really know what you are doing and are prepared for a very broken experience you can use another installation option for installing on ARM: https://docs.brew.sh/Installation However, there *is* a way to install Homebrew! You "just" need to "lie" about the processor being used! % arch -arch x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" # works! This works by using the [**arch**(1)][5] command, which allows explicitly specifying (overriding) the CPU environment that the child process runs within. Within `arch -arch x86_64 command`, `command` believes it's running on an x86_64 CPU. Update the Unix `dependencies.md` documentation to document how to install Homebrew on an M1 CPU. Update `xaprepare` so that whenever a `brew` command is executed on an M1 CPU, the command is prefixed with `arch -arch x86_64`. `xaprepare` uses the [`sysctl.proc_translated` system control][6] to determine if it's currently running within a Rosetta environment, so that `arch -arch x86_64` is not used unless required. [0]: https://www.apple.com/newsroom/2020/11/introducing-the-next-generation-of-mac/ [1]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [2]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [3]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment [4]: https://brew.sh [5]: https://www.unix.com/man-page/osx/1/arch/ [6]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845
jonpryor
added a commit
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Jan 30, 2021
Fixes: #5518 Context: https://github.com/xamarin/xamarin-android/projects/16 [Apple announced new Mac hardware][0], which use an [M1 CPU][1], which is an arm64-compatible ABI, *not* intel based. Legacy software built for intel CPUs will still run via the [Rosetta][3] translation environment. Because of Rosetta, existing Xamarin.Android binaries will work as-is on Mac hardware with M1 CPUs. However, what if you want to *build* the xamarin-android repo on an M1 CPU? Previously, that would fail: % make prepare PREPARE_AUTOPROVISION=true … Error: Could not find Homebrew on this system, please install it from https://brew.sh/ Unfortunately, [Homebrew][4] won't install by default: % /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" Password: Homebrew is not (yet) supported on ARM processors! Rerun the Homebrew installer under Rosetta 2. If you really know what you are doing and are prepared for a very broken experience you can use another installation option for installing on ARM: https://docs.brew.sh/Installation However, there *is* a way to install Homebrew! You "just" need to "lie" about the processor being used! % arch -arch x86_64 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)" # works! This works by using the [**arch**(1)][5] command, which allows explicitly specifying (overriding) the CPU environment that the child process runs within. Within `arch -arch x86_64 command`, `command` believes it's running on an x86_64 CPU. Update the Unix `dependencies.md` documentation to document how to install Homebrew on an M1 CPU. Update `xaprepare` so that whenever a `brew` command is executed on an M1 CPU, the command is prefixed with `arch -arch x86_64`. `xaprepare` uses the [`sysctl.proc_translated` system control][6] to determine if it's currently running within a Rosetta environment, so that `arch -arch x86_64` is not used unless required. [0]: https://www.apple.com/newsroom/2020/11/introducing-the-next-generation-of-mac/ [1]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [2]: https://www.apple.com/newsroom/2020/11/apple-unleashes-m1/ [3]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment [4]: https://brew.sh [5]: https://www.unix.com/man-page/osx/1/arch/ [6]: https://developer.apple.com/documentation/apple_silicon/about_the_rosetta_translation_environment#3616845
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Apple announced new Mac hardware, which use an M1 CPU, which is an arm64-compatible ABI, not intel based. Legacy software built for intel CPUs will still run via the Rosetta translation environment.
What about building the xamarin-android repo on an M1 CPU?
Currently, that fails:
Unfortunately, Homebrew won't install by default:
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