[MacPorts] #45492: gcc49: Graphite loop optimizations cannot be used

[MacPorts]

#45492: gcc49: Graphite loop optimizations cannot be used
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 Reporter:  hiro.masa.yoshi.moto@…  |      Owner:  macports-tickets@…
     Type:  defect                  |     Status:  new
 Priority:  Normal                  |  Milestone:
Component:  ports                   |    Version:  2.3.2
 Keywords:                          |       Port:  gcc49
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 gcc49 can not use graphite loop optimizations.

 For example, I can not use "-floop-parallelize-all" optimization as
 follows:

 {{{
  $ echo "int main(){return 0;}" | gcc-mp-4.9 -floop-parallelize-all  -xc -

  <stdin>:1:0: sorry, unimplemented: Graphite loop optimizations cannot be
 used
  (-fgraphite, -fgraphite-identity, -floop-block, -floop-interchange,
 -floop-strip-mine, -floop-parallelize-all, and -ftree-loop-linear)
 }}}

 This error is caused by isl library.
 While macports uses isl-0.13, it is not officially supported yet by gcc.

 I found a workaround and fixed Portfiles.
 Please check attached files for details.

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Ticket URL: <https://trac.macports.org/ticket/45492>
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