Re: [Caml-list] arm backend

[Nathaniel Gray <n8gray@gmail.com>]

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On Tue, May 5, 2009 at 2:43 AM, Xavier Leroy <Xavier.Leroy@inria.fr> wrote:
>
> Concerning the iPhone, it is not supported out of the box by 3.11 nor
> by the CVS trunk code.  For 3.11, several patches have been mentioned
> on this list; it would be great if someone with iPhone development
> experience could combine them and publish a unified patch.

Feel free to attach any such patch to the bug in mantis:
  http://caml.inria.fr/mantis/view.php?id=4782

> For the CVS trunk code, it seems we are getting close: as far as I
> could see, MacOSX/ARM uses EABI plus Apple's "signature" approach to
> dynamic linking.  However, I haven't yet succeeded in running Apple's
> iPhone SDK compilers from the command-line.  (It looks like one of
> those Microsoft SDK's that assume everyone is developing from the
> vendor-supplied IDE...)  Again, I welcome feedback and patches from
> iPhone development experts.

I'm attaching (here and at the bug) a script I use to configure and
build an e-mail library for both the iPhone simulator (x86) and the
iPhone itself (arm).  There's some extraneous junk in there but you
should get the idea.  The important flags are '-arch armv6' and
'-isysroot /path/to/sdk'.  It might also be worth mentioning that
Apple prohibits the use of dynamic libraries in iPhone apps (for now
at least) and most iPhone projects are built in Thumb mode by default.

Cheers,
-n8

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#!/bin/zsh
# We do have iconv and libz built in on iPhone
# We have expat on the simulator but not the phone.  That's ok, we don't need it

# NOTE: be sure to verify the tool versions below!

# Where to install
PREFIX=$HOME/src/MyProject/usr
GCCVERSION=4.0.1
SDKVERSION=2.2.1
DARWINVERSION=9

case $1 in
    arm)
        PLAT=/Developer/Platforms/iPhone.platform
        SDK=$PLAT/Developer/SDKs/iPhoneOS$SDKVERSION.sdk
        export CFLAGS="-arch armv6"
        export LDFLAGS="-arch armv6"
        CONFIGOPTS=(--build=`config.guess` --host=arm-apple-darwin9)
        GCCPREFIX=arm
        ;;
        
    i386)
        PLAT=/Developer/Platforms/iPhoneSimulator.platform
        SDK=$PLAT/Developer/SDKs/iPhoneSimulator$SDKVERSION.sdk
        export CFLAGS=
        export LDFLAGS=
        CONFIGOPTS=
        GCCPREFIX=i686
        ;;
    *)
        echo "Usage: $0 (arm|i386)"
        echo " and make sure to verify the SDK version & gcc version are correct"
        exit 1
        ;;
esac

export CFLAGS="$CFLAGS -isysroot $SDK"
BIN=$PLAT/Developer/usr/bin
export CPP=$BIN/cpp
export CXXCPP=$BIN/cpp
export CC=$BIN/$GCCPREFIX-apple-darwin$DARWINVERSION-gcc-$GCCVERSION
export CXX=$BIN/$GCCPREFIX-apple-darwin$DARWINVERSION-g++-$GCCVERSION
export LD=$BIN/ld
export AS=$BIN/as

cd libetpan-0.57
PATH=$BIN:$PATH ./configure --prefix=$PREFIX --disable-shared --enable-static --disable-db --without-sasl --without-gnutls --with-openssl=$PREFIX $CONFIGOPTS

PATH=$BIN:$PATH make