[MacPorts] #36419: Upgrade to ISL 0.10 breaks old binaries

[MacPorts]

#36419: Upgrade to ISL 0.10 breaks old binaries
------------------------+--------------------------------
 Reporter:  bgschaid@…  |      Owner:  macports-tickets@…
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.1.2
 Keywords:              |       Port:
------------------------+--------------------------------
 After upgrading from @0.07_2 and after applying the workaround described
 in  #36418 to fix a problem with cloog cpp-mp-4.6 fails with this message

 {{{
 dyld: Library not loaded: /opt/local/lib/libisl.7.dylib
   Referenced from: /opt/local/libexec/gcc/x86_64-apple-darwin11/4.6.3/cc1
   Reason: image not found
 cpp-mp-4.6: internal compiler error: Trace/BPT trap: 5 (program cc1)
 }}}

 after resolving this with a symbolic link to libisl.10.dylib it fails with

 {{{
 dyld: Library not loaded: /opt/local/lib/libisl.9.dylib
   Referenced from: /opt/local/lib/libcloog-isl.2.dylib
   Reason: image not found
 cpp-mp-4.6: internal compiler error: Trace/BPT trap: 5 (program cc1)
 }}}

 After adding one more symbolic link the compiler works

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Ticket URL: <https://trac.macports.org/ticket/36419>
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