[MacPorts] #62322: freeimage: undefined symbols for _png_init_filter_functions_neon

[MacPorts]

#62322: freeimage: undefined symbols for _png_init_filter_functions_neon
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  Reporter:  platipodium  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.4
Resolution:               |   Keywords:  arm64
      Port:  freeimage    |
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Comment (by ryandesign):

 Hm no that's not it. That upstream issue was fixed in libpng 1.6.15.
 freeimage includes libpng 1.6.35.

 The problem is more that libpng decides at configure time what sources to
 build, but freeimage does not use a configure script and has a hardcoded
 list of sources to build (in Makefile.srcs). The hardcoded list of sources
 is evidently correct for Intel but wrong for ARM, at least when ARM
 optimizations are enabled, which they are unless we specify otherwise.

 We could either tell the png source not to use ARM optimizations (put
 `-DPNG_ARM_NEON_OPT=0` in CPPFLAGS) or we could add the required ARM-
 specific source files to Makefile.srcs. The first is probably easier,
 especially since the version of libpng bundled with freeimage is missing
 the entire
 [https://sourceforge.net/p/libpng/code/ci/libpng-1.6.15-signed/tree/arm/
 arm directory] that contains the source files that define the
 `png_init_filter_functions_neon` function.

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Ticket URL: <https://trac.macports.org/ticket/62322#comment:4>
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