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I tried to build game which is created by renpy (Ren'Py 6.99.11.1749). I succeeded building the game on iOS simulator (iPhone 6). But I tried to run on my device (iPhone 5s, iOS 10.0.2) and that build failed. Xcode (Xcode 8.0) complains that:

Undefined symbols for architecture arm64:
  "_png_init_filter_functions_neon", referenced from:
      _png_init_filter_functions in libpng.a(pngrutil.o)
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
trashr0x
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shikugawa
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1 Answers1

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Others had the same issue before. It seems that the cause is due to optimizations for ARM neon that are not supported. See, e.g., this bug report or this question.

One solutions (work around) seems to be to define the preprocessor flag PNG_ARM_NEON_OPT=0.

Community
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Martin Nyolt
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  • I added `PNG_ARM_NEON_OPT=0` to Debug of Preprocessor Macros, and set build configuration Debug. but cannot build it and remain the error. – shikugawa Nov 14 '16 at 16:20