[MacPorts] #66211: gv @3.7.4 does not launch because symbol _yylex is not found in flat namespace

[MacPorts]

#66211: gv @3.7.4 does not launch because symbol _yylex is not found in flat
namespace
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  Reporter:  ballapete  |      Owner:  ryandesign
      Type:  defect     |     Status:  accepted
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:  monterey
      Port:  gv         |
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Comment (by andrewathome):

 I see the same error with gv 3.7.4 and Ventura 13.1 on arm64.
 So I did a bit of digging and came up with the below hack that seems to
 work around the issue.
 I've added this update in case someone else finds it useful.

 ----

 Looks like the undefined symbol _yylex is not in gv itself, but in a
 dynamic library:
 /opt/local/lib/libfl.2.dylib

 It's not clear why this library is included, since it only provides two
 symbols:
 _main (already provided in gv itself), and _yywrap (not used in gv or in
 any of the other dynamic libraries).

 So I created an (almost) empty dynamic library and installed it as
 /opt/local/lib/fake.dylib,
 and replaced the reference to the offending libfl.2 by using this command:

 install_name_tool -change /opt/local/lib/libfl.2.dylib
 /opt/local/lib/fake.dylib /opt/local/bin/gv

 Now my gv no longer aborts with the unresolved symbol error,
 and I am able to view postscript docs.


 Of course the usual caveats apply: it's a hack/workaround, not a solution;
 it's unlikely to be futureproof; I haven't tested the patched gv
 exhausatively, so there could well be gotyas that I haven't yet stumbled
 upon.

-- 
Ticket URL: <https://trac.macports.org/ticket/66211#comment:5>
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