[MacPorts] #74395: jbig2dec @0.20: fatal error: 'png.h' file not found (was: can not build jbig2dec missing depency)

[MacPorts]

#74395: jbig2dec @0.20: fatal error: 'png.h' file not found
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  Reporter:  ErwanMAS  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  jbig2dec  |
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Comment (by ryandesign):

 The log says the problem was:

 {{{
 :info:build jbig2_image_png.c:27:10: fatal error: 'png.h' file not found
 :info:build    27 | #include <png.h>
 :info:build       |          ^~~~~~~
 :info:build 1 error generated.
 }}}

 It's curious that it couldn't find the libpng header because earlier in
 the build, it did find the libpng library, and usually a system that has
 one will also have the other.

 {{{
 :info:configure checking for png_create_write_struct in -lpng... yes
 }}}

 However you're right, the libpng dependency is missing from this port.

 On the buildbot, the builds probably succeeded because the libpng library
 wasn't there, so it didn't try to build the libpng-requiring parts.

-- 
Ticket URL: <https://trac.macports.org/ticket/74395#comment:4>
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