[cairo] Cairo 1.10.0 iPhone

[Andrea Canciani]

On Tue, Sep 21, 2010 at 1:17 PM, Pavel Kanzelsberger <kanzels at gmail.com> wrote:
> Hello,
> I'm working a lot with Cairo and Quartz surfaces on MacOSX and decided to
> port one of my projects to iPhone as well. Version compiled for iPhone
> Simulator works perfect, but I'm now fighting with cross-compilation of
> Cairo library to armv7 and using iPhoneOS3.2.sdk ... anybody tried this
> already? Or is there any simplified way to achieve libcairo.a for armv7?
> See below a script that tries to build it:
> I'm also passing following to configure script "--enable-fc=no
> --enable-ft=no --enable-xlib=no" since I'm using CoreText directlry to
> display my texts, I'm just using Cairo as a wrapper for Quartz 2D.
> #!/bin/sh
> # Select the desired iPhone SDK
> export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer
> export SDKROOT=$DEVROOT/SDKs/iPhoneOS3.2.sdk
> # Set up relevant environment variables
> export CPPFLAGS="-I$SDKROOT/usr/lib/gcc/arm-apple-darwin10/4.2.1/include/
> -I$SDKROOT/usr/include/
> -I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.2.sdk/System/Library/Frameworks/"
> export CFLAGS="$CPPFLAGS -arch armv7 -pipe -no-cpp-precomp -isysroot
> $SDKROOT"
> export CPP="$DEVROOT/usr/bin/cpp $CPPFLAGS"
> export CXXFLAGS="$CFLAGS"
> LIBNAME="cairo"
> ./configure CXX=$DEVROOT/usr/bin/arm-apple-darwin10-g++-4.0.1
> CC=$DEVROOT/usr/bin/arm-apple-darwin10-gcc-4.0.1 LD=$DEVROOT/usr/bin/ld
> --host=arm-apple-darwin $1 $2 $3 $4 $5 $6
> make
>
>
>
> Configure will complain these:
> checking ApplicationServices/ApplicationServices.h usability... no
> checking ApplicationServices/ApplicationServices.h presence... no
> checking for ApplicationServices/ApplicationServices.h... no
> checking CoreGraphics/CoreGraphics.h usability... yes
> checking CoreGraphics/CoreGraphics.h presence... no
> configure: WARNING: CoreGraphics/CoreGraphics.h: accepted by the compiler,
> rejected by the preprocessor!
> configure: WARNING: CoreGraphics/CoreGraphics.h: proceeding with the
> compiler's result
> checking for CoreGraphics/CoreGraphics.h... yes
> checking whether cairo's Quartz surface backend feature could be enabled...
> no (requires ApplicationServices framework)
> checking for cairo's Quartz font backend feature...
> checking whether cairo's Quartz font backend feature could be enabled... no
> (requires ApplicationServices framework)

config.log will contain additional informations about what exactly fails in the
automatic detection of the availability of CoreGraphics.

On MacOS X 10.6 CoreGraphics is provided by ApplicationServices, but
on iOS it should be in its own framework.

It looks like both configure.ac and src/cairo-quartz.h will need to be fixed to
work as expected on iOS.

I will try to make cairo work on iOS soon-ish, but in the meantime I would
be happy to review patches to fix the build process.

I would also like to see the config.log and the make warning/errors (expecially
because cairo should compile even if you disable all the native backends).

Andrea