[MacPorts] #49227: gcc5 @5.2.0: fix gcj

[MacPorts]

#49227: gcc5 @5.2.0: fix gcj
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  Reporter:  howarth.at.macports@…  |      Owner:  mww@…
      Type:  defect                 |     Status:  new
  Priority:  Normal                 |  Milestone:
 Component:  ports                  |    Version:  2.3.4
Resolution:                         |   Keywords:  haspatch
      Port:  gcc5                   |
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Comment (by howarth.at.macports@…):

 Note that at the absolute very least you should be using the changes to
 download the ecj.jar file and place it in the source directory. Otherwise
 you build a crippled gcj which is incapable for processing java files and
 can only operate on precompiled class files. This isn't particularly well
 documented in FSF gcc. The changes were introduced in...

 https://gcc.gnu.org/ml/java-patches/2006-q4/msg00061.html

 and require the build to either...

 1) Place the ecj.jar in the source directory before starting the build

 2) Pass  the location of a preinstalled ecj.jar file to configure with the
 --with-ecj-jar= libjava configure option

 The omission of building ecj1 (due to the absence of an ecj.jar)
 unfortunately isn't caught by the FSF gcc test suite due to their use of
 classes to test gcj rather than java source files.

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Ticket URL: <https://trac.macports.org/ticket/49227#comment:13>
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