I'm trying to build skia library for ios.
The xcode project generate command GYP_DEFINES="skia_os='ios' skia_arch_type='arm' armv7=1 arm_neon=0" ./gyp_skia always return GYP_GENERATORS environment variable not set, using default, does this mean the config variables are not set?
And also, how do I add arm64 support? I tried skia_arch_type='arm64', didn't seem the way to go.
