get libllmr.a building for ARM architectures

[incanus]

The existing OS X libllmr.a gets linked ok for iOS simulator testing, but can't be tested on a real device.

[incanus]

Just going at this from the Xcode side, if I change the llmr target's build SDK from OS X to iOS, then build for "iOS Device", it just goes ahead and builds for ARM:

armv7:

Libtool xcode/src/llmr-ios.build/Debug-iphoneos/llmr.build/Objects-normal/armv7/libllmr.a normal armv7
...

armv7s:

Libtool xcode/src/llmr-ios.build/Debug-iphoneos/llmr.build/Objects-normal/armv7s/libllmr.a normal armv7s
...

Then the universal binary:

CreateUniversalBinary xcode/src/Debug-iphoneos/libllmr.a normal armv7\ armv7s
...

But then building the actual app gives me:

ld: library not found for -lllmr

From running:

Ld xcode/build/llmr-ios.build/Debug-iphoneos/ios.build/Objects-normal/arm64/ios normal arm64
    cd "/Users/incanus/Documents/Projects/Development Seed/MapBox/vector/llmr.native"
    setenv IPHONEOS_DEPLOYMENT_TARGET 7.0
    setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/Users/incanus/bin:/Applications/Postgres.app/Contents/MacOS/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/usr/local/MacGPG2/bin:/Users/incanus/.rvm/bin"
    /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -L/Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/build/Debug-iphoneos -F/Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/build/Debug-iphoneos -F/Applications/Xcode.app/Contents/Developer/Library/Frameworks -filelist /Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/build/llmr-ios.build/Debug-iphoneos/ios.build/Objects-normal/arm64/ios.LinkFileList -dead_strip -stdlib=libc++ -Wl,-search_paths_first -Wl,-headerpad_max_install_names /Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/src/Debug/libllmr.a -fobjc-arc -fobjc-link-runtime -stdlib=libc++ -miphoneos-version-min=7.0 -lllmr -framework CoreGraphics -framework Foundation -framework GLKit -framework OpenGLES -framework UIKit -Xlinker -dependency_info -Xlinker /Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/build/llmr-ios.build/Debug-iphoneos/ios.build/Objects-normal/arm64/ios_dependency_info.dat -o /Users/incanus/Documents/Projects/Development\ Seed/MapBox/vector/llmr.native/xcode/build/llmr-ios.build/Debug-iphoneos/ios.build/Objects-normal/arm64/ios

Still trying to figure out how to get it to link properly, but I think that's specific to my project.

---

The relevant stuff changed in Xcode is adding a platforms directive:

SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";

And one for SDKROOT:

 SDKROOT = iphoneos;

So that it doesn't use the Xcode default of OS X for things. The "build all architectures including 64-bit" seems to carry over fine between platforms so that we get a 64-bit ARM build, too.

[incanus]

Eh, architectures does need some finagling:

OS X:

ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";

iOS:

ARCHS = "$(ARCHS_STANDARD_INCLUDING_64_BIT)";

[incanus]

Success on hardware! (With some hardcoded linking for now.) There are some specific gaps between tiles during rotation and some other glitchy artifacts, but for the most part, it's pretty solid. Also:

2014-01-29 17:09:22.942 ios[4773:60b] FPS: 54.585692
2014-01-29 17:09:23.942 ios[4773:60b] FPS: 59.997368
2014-01-29 17:09:24.943 ios[4773:60b] FPS: 59.967602
2014-01-29 17:09:25.943 ios[4773:60b] FPS: 59.991247
2014-01-29 17:09:26.944 ios[4773:60b] FPS: 59.940478
2014-01-29 17:09:27.944 ios[4773:60b] FPS: 59.996281
2014-01-29 17:09:28.963 ios[4773:60b] FPS: 53.984018
2014-01-29 17:09:29.976 ios[4773:60b] FPS: 57.206384
2014-01-29 17:09:30.977 ios[4773:60b] FPS: 59.984940
2014-01-29 17:09:31.977 ios[4773:60b] FPS: 59.980451
2014-01-29 17:09:32.977 ios[4773:60b] FPS: 59.999399
2014-01-29 17:09:33.977 ios[4773:60b] FPS: 59.969717
2014-01-29 17:09:34.981 ios[4773:60b] FPS: 59.771732
2014-01-29 17:09:35.982 ios[4773:60b] FPS: 59.961258
2014-01-29 17:09:36.992 ios[4773:60b] FPS: 60.373864
2014-01-29 17:09:37.994 ios[4773:60b] FPS: 59.895597
2014-01-29 17:09:39.011 ios[4773:60b] FPS: 59.982165
2014-01-29 17:09:40.027 ios[4773:60b] FPS: 60.030029
2014-01-29 17:09:41.048 ios[4773:60b] FPS: 57.787285
2014-01-29 17:09:42.060 ios[4773:60b] FPS: 57.314287
2014-01-29 17:09:43.077 ios[4773:60b] FPS: 59.987059
2014-01-29 17:09:44.078 ios[4773:60b] FPS: 59.968874
2014-01-29 17:09:45.079 ios[4773:60b] FPS: 59.911995
2014-01-29 17:09:46.094 ios[4773:60b] FPS: 60.072298
2014-01-29 17:09:47.096 ios[4773:60b] FPS: 57.933148
2014-01-29 17:09:48.111 ios[4773:60b] FPS: 60.069887
2014-01-29 17:09:49.113 ios[4773:60b] FPS: 59.915633
2014-01-29 17:09:50.113 ios[4773:60b] FPS: 59.972061
2014-01-29 17:09:51.131 ios[4773:60b] FPS: 59.948027
2014-01-29 17:09:52.145 ios[4773:60b] FPS: 60.122990
2014-01-29 17:09:53.146 ios[4773:60b] FPS: 59.948260

[kkaefer]

Pretty awesome! Not sure why there would be gaps between tiles though, are these the debug lines?

[incanus]

This is a non-issue now -- builds fine. This will be ultimately solved by #21 so closing here.