[MacPorts] #69603: port gnome/gjs does not build on macos 10.13.6 with error info:build ld: symbol(s) not found for architecture x86_64

[MacPorts]

#69603: port gnome/gjs does not build on macos 10.13.6 with error info:build ld:
symbol(s) not found for architecture x86_64
----------------------------+--------------------
  Reporter:  christophecvr  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  gnome/gjs      |
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Comment (by kencu):

 This is an issue that come up in MacPorts every once in a while.

 See this list, for examples, where it has happened before:

 https://trac.macports.org/search?changeset=on&milestone=on&portsummarysearch=on&ticket=on&wiki=on&q=%2FSystem%2FLibrary%2FFrameworks%2FImageIO.framework%2FVersions%2FA%2FImageIO&page=1&noquickjump=1


 essentially, the dyld library loader finds the newer libjpeg.dylib
 installed by MacPorts instead of the older libjpeg.dylib that ImageIO was
 originally built against.

 The fix is always to find out why the library loader is being forced to
 look in /opt/local/lib when loading the libraries the system ImageIO is
 linked against. There is always some reason -- errant @rpath settings,
 DYLD_LIBRARY_PATH being set, something along those lines usually.

 In this particular case, it might be {{{-Wl,-rpath,/opt/local/lib}}} that
 is forcing the dyld loader to look first in that location, and messing up
 the finding of the proper library. If that turns out to be the case, what
 to do about it is another question.

 Some package mangers sequester all the headers and libraries away in
 subfolders to prevent this issue. It makes builds harder for everything
 else, though.

-- 
Ticket URL: <https://trac.macports.org/ticket/69603#comment:1>
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