iOS Build Support

[carson-katri]

This adds support for building dependencies for iOS. It depends on lightpanda-io/zig-v8-fork#96 for v8.

Lightpanda can be built for iOS with these commands:

make get-v8
OS=ios make build-v8

export OS=iphonesimulator
export ARCH=arm64
export SDK=$(xcrun --sdk $OS --show-sdk-path)
export CC=$(xcrun --sdk "$SDK" -f clang)
export CXX=$(xcrun --sdk "$SDK" -f clang++)
export CPP="$CC -E"
export AR="$(xcrun --sdk "$SDK" -f ar)"
export RANLIB="$(xcrun --sdk "$SDK" -f ranlib)"
export CFLAGS="-isysroot \"$SDK\" -arch $ARCH -mios-simulator-version-min=16.0"
export LDFLAGS="-isysroot \"$SDK\" -arch $ARCH -mios-simulator-version-min=16.0"
export MAKE="make CC=$CC AR=$AR RANLIB=$RANLIB"
export CMAKE="cmake -DCMAKE_SYSTEM_NAME=iOS -DCMAKE_OSX_ARCHITECTURES=$ARCH -DCMAKE_OSX_SYSROOT=\"$SDK\" -DCMAKE_OSX_DEPLOYMENT_TARGET=16.0"
export AUTOCONF_FLAGS="--disable-shared --host=arm-apple-darwin CC=\"$CC\" CXX=\"$CXX\" CPP=\"$CPP\" AR=\"$AR\" RANLIB=\"$RANLIB\" CFLAGS=\"$CFLAGS\" CPPFLAGS=\"$CFLAGS\" LDFLAGS=\"$LDFLAGS\""
export SKIP_EXAMPLES=1
make install

SDK=$(xcrun --sdk iphonesimulator --show-sdk-path) zig build -Dtarget=aarch64-ios-simulator -Dcpu=apple_m1 --release=safe

Note

The lightpanda executable cannot be built for iOS. build.zig should be modified to produce a liblightpanda.a file that can be included in an xcframework.

[github-actions]

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[carson-katri]

I have read the CLA Document and I hereby sign the CLA

[krichprollsch]

Thanks for the PR.

The lightpanda executable cannot be built for iOS. build.zig should be modified to produce a liblightpanda.a file that can be included in an xcframework.

What about adding a new step for ios only generating this lib?
And erroring the steps not compatibles w/ ios?

[krichprollsch]

Do we have an alternative dir to use on ios?

[carson-katri]

I inlined the macOS version.

[krichprollsch]

I'm not sure about changing this flag for all build.
Maybe it could be conditional for ios only for now? Or is there another reason to use it?

[carson-katri]

I adjusted it to only add that flag for iOS builds.

[carson-katri]

I added a zig build static-lib step based on lib.zig. Right now this is empty, but it can include extern definitions. We're building out the API we need for liveview-native this way.

We're going to want this static lib on other platforms too, so I didn't restrict it to iOS.

[krichprollsch]

Please can you rebase the PR to remove the .DS_Store file 🙏

May I suggest you to configure a global .gitgnore file to avoid the risk of committing these kind of files. We don't want to add this into the project's gitignore because it relates to the dev workspace.

[krichprollsch]

I have an error b/c this file is missing when I'm trying to run zig build static-lib