Re: [Boost-users] [Boost.build] Building for ARM64

Subject: Re: [Boost-users] [Boost.build] Building for ARM64
From: mefyl (mefyl_at_[hidden])
Date: 2015-01-13 10:16:29

On Tuesday 13 January 2015 17:06:55 Vladimir Prus wrote:
> On 01/13/2015 04:45 PM, mefyl wrote:
> > On Tuesday 13 January 2015 13:49:29 Akim Demaille wrote:
> >>> Le 13 janv. 2015 à 13:42, Vladimir Prus <vladimir_at_[hidden]> a
> >>> écrit :
> >>> 
> >>> +flags clang-darwing OPTIONS <architecture>arm <address-model>64 : -arch
> >>> arm64
> >> 
> >> Isn't darwing a typo?
> > 
> > I took the liberty of fixing that to "darwin" =)
> > 
> > Thanks a lot, works like a charm ! For the record, all you need to add is
> > the SDKROOT so clang finds the iPhone headers:
> > 
> > $
> > SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.pla
> > tform/Developer/SDKs/iPhoneOS8.1.sdk ./b2 -q toolset=clang
> > architecture=arm abi=aapcs address-model=64 binary-format=mach-o [...]
> > $ lipo -info
> > bin.v2/libs/context/build/clang-darwin-4.2.1/release/abi-aapcs/address-mo
> > del-64/architecture-arm/threading-multi/libboost_context.dylib Non-fat
> > file:
> > bin.v2/libs/context/build/clang-darwin-4.2.1/release/abi-aapcs/address-mo
> > del-64/architecture-arm/threading-multi/libboost_context.dylib is
> > architecture: arm64
> Cool. Could you suggest entire set of -arch options that should be added to
> clang-darwin.jam?

Sure, here are the ones I actively use:

flags clang-darwin OPTIONS <architecture>arm <address-model>32 : -arch armv7 ;
flags clang-darwingOPTIONS <architecture>arm <address-model>64 : -arch arm64 ;

flags clang-darwin OPTIONS <architecture>x86 <address-model>32 : -arch x86 ;
flags clang-darwin OPTIONS <architecture>x86 <address-model>64 : -arch x86_64 ;

>From the clang documentation, I would infer these, altough I can't test them:

flags clang-darwin OPTIONS <architecture>sparc : -arch sparc ; // sparcv9 also exists

flags clang-darwin OPTIONS <architecture>power <address-model>32 : -arch ppc ;
flags clang-darwin OPTIONS <architecture>power <address-model>64 : -arch ppc64 ;

I'm not really fluent about mips.

Boost has: "mips1" "mips2" "mips3" "mips4" "mips32" "mips32r2" "mips64"
clang has:
 mips,    // MIPS: mips, mipsallegrex
 mipsel,  // MIPSEL: mipsel, mipsallegrexel
 mips64,  // MIPS64: mips64
 mips64el,// MIPS64EL: mips64el
 msp430,  // MSP430: msp430

Additionnaly, clang can create Apple fat objects and libraries combining several
architecture by passing multiple -arch option. By building with "-arm x86_64 -arch
arm -arch arm64" you get libraries working on 32 or 64 bits phones as well as the
emulator, for instance. However, I suppose it wouldn't be practical to do this with
boost.build since different set of files/option should be picked in the same build?
One can build three times and merge libraries afterwards anyway.

Cheers,

-- 
Quentin "mefyl" Hocquet
CTO @ infinit.io