[MacPorts] #64294: New version of isl seems broken for ppc64

[MacPorts]

#64294: New version of isl seems broken for ppc64
---------------------------+------------------------------------------
  Reporter:  barracuda156  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.7.1
Resolution:                |   Keywords:  PowerPC, Leopard, ppc64, gcc
      Port:  isl           |
---------------------------+------------------------------------------

Comment (by barracuda156):

 Another problem, if it is built and installed ppc-only, it breaks down
 gcc6 and gcc7 existing installations:

 {{{
 Could not open /opt/local/lib/libisl.22.dylib: Error opening or reading
 file (referenced from /opt/local/libexec/gcc/ppc-apple-darwin10/7.5.0/cc1)
 --->  Found 12 broken files, matching files to ports
 --->  Found 2 broken ports, determining rebuild order
 You can always run 'port rev-upgrade' again to fix errors.
 The following ports will be rebuilt:
  gcc6 @6.5.0
  gcc7 @7.5.0
 Continue? [Y/n]: n
 }}}

 After {{{isl}}} update there is no {{{libisl.22.dylib}}} there, it is
 replaced with {{{libisl.23.dylib}}}.

-- 
Ticket URL: <https://trac.macports.org/ticket/64294#comment:1>
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