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[boost-modular-build-helper] Bugfix/boost arm64 ios #18124

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[boost-modular-build-helper] Bugfix/boost arm64 ios #18124

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ef00875
bugfix/boost_arm64_ios
May 26, 2021
b9a8813
Merge branch 'master' of https://github.com/microsoft/vcpkg
May 26, 2021
94f9511
using iPhoneOS.sdk
May 26, 2021
21c8181
adding iOS condition
May 26, 2021
2186fa2
Restrict change to system iOS and added OSX fix
StefAviator May 31, 2021
fd750d5
update port version to 10
StefAviator May 31, 2021
778c474
update port version part 2
StefAviator May 31, 2021
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2 changes: 1 addition & 1 deletion ports/boost-modular-build-helper/boost-modular-build.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -99,7 +99,7 @@ function(boost_modular_build)
vcpkg_install_cmake()
endfunction()

if(VCPKG_CMAKE_SYSTEM_NAME AND NOT VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
if(VCPKG_CMAKE_SYSTEM_NAME AND NOT VCPKG_CMAKE_SYSTEM_NAME STREQUAL "WindowsStore" AND NOT (VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64" AND (VCPKG_CMAKE_SYSTEM_NAME STREQUAL "iOS" OR VCPKG_CMAKE_SYSTEM_NAME STREQUAL "Darwin")))
set(build_flag 0)
if(NOT DEFINED VCPKG_BUILD_TYPE)
set(build_flag 1)
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30 changes: 29 additions & 1 deletion ports/boost-modular-build-helper/user-config.jam
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Expand Up @@ -8,9 +8,37 @@ if "@VCPKG_PLATFORM_TOOLSET@" != "external"
@TOOLSET_OPTIONS@
;
}
else if "@VCPKG_TARGET_ARCHITECTURE@" = "arm64" && "@VCPKG_CMAKE_SYSTEM_NAME@" = "iOS"
{
using gcc : 12.0.0 : @CMAKE_CXX_COMPILER@
:
<ranlib>@CMAKE_RANLIB@
<archiver>@CMAKE_AR@
@CXXFLAGS@
@CFLAGS@
@LDFLAGS@
# MINGW here causes b2 to not run cygpath
<flavor>mingw
<compileflags>"-std=c++14 -stdlib=libc++ -DNDEBUG -arch arm64 -fembed-bitcode -Wno-unused-local-typedef -Wno-nullability-completeness -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk"
;
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This compilerflag is needed to compile arm64 for iOS

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There's a way to specify the iOS target via the CMakeLists.txt file, which could remove the need to change the user-config.jam. Specifically the line that specifies the target-os option:

if(APPLE)
    list(APPEND B2_OPTIONS target-os=darwin toolset=clang)
elseif(WIN32)
    list(APPEND B2_OPTIONS target-os=windows toolset=gcc)
elseif(ANDROID)

For iOS, that would be target-os=iphone docs

It would also be nice to make this work for both arm64 iOS and macOS builds, i.e. the arm64-ios and arm64-osx triplets:

set(VCPKG_TARGET_ARCHITECTURE arm64)
set(VCPKG_CMAKE_SYSTEM_NAME iOS)

and

set(VCPKG_TARGET_ARCHITECTURE arm64)
set(VCPKG_CMAKE_SYSTEM_NAME Darwin)

Boosts's b2 doesn't natively support arm64, so the extra -arch arm64 can be added to the CMakeLists.txt config like so:

if(APPLE AND VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
  set(CFLAGS "${CFLAGS} <compileflags>-arch <compileflags>arm64")
  set(CXXFLAGS "${CXXFLAGS} <compileflags>-arch <compileflags>arm64")
  set(LDFLAGS "${LDFLAGS} <linkflags>-arch <linkflags>arm64")  
endif()

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@StefAviator StefAviator May 31, 2021 •
edited
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I have tried adding these compilerflags to CMakeLists.txt but it keeps outputting x86-64 library files so unfortunately it does not work. I tried this change using both unix_build and the second builder. If you know how to get this to work to cross-compile on an Apple PC/laptop with Intel chip to arm64 by adjusting the CMakeLists file, please share.

}
else if "@VCPKG_TARGET_ARCHITECTURE@" = "arm64" && "@VCPKG_CMAKE_SYSTEM_NAME@" = "Darwin"
{
using gcc : 12.0.0 : @CMAKE_CXX_COMPILER@
:
<ranlib>@CMAKE_RANLIB@
<archiver>@CMAKE_AR@
@CXXFLAGS@
@CFLAGS@
@LDFLAGS@
# MINGW here causes b2 to not run cygpath
<flavor>mingw
<compileflags>"-std=c++14 -stdlib=libc++ -DNDEBUG -arch arm64 -fembed-bitcode -Wno-unused-local-typedef -Wno-nullability-completeness -mmacosx-version-min=10.12 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk"
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Here we are using the default MacOS sdk on the system. "Darwin" above is used in the triplet for unix / osx / MacOS.

;
}
else
{
using gcc : 5.4.1 : @CMAKE_CXX_COMPILER@
using gcc : 12.0.0 : @CMAKE_CXX_COMPILER@
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Updating to the latest gcc.

:
<ranlib>@CMAKE_RANLIB@
<archiver>@CMAKE_AR@
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