[MacPorts] #25138: arpack default variant not handled correctly

[MacPorts]

#25138: arpack default variant not handled correctly
-------------------------------------+--------------------------------------
 Reporter:  and.damore@…             |       Owner:  mmoll@…           
     Type:  defect                   |      Status:  new               
 Priority:  Normal                   |   Milestone:                    
Component:  ports                    |     Version:  1.8.2             
 Keywords:                           |        Port:  arpack            
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 The default_variant '''if''' condition in Portfile is placed after the
 '''if/elseif/else''' that executes 'set gccversion 4.x'.

 This way when no variant is explicitly selected '''gccversion''' is set to
 '''4.5''', the last '''else''' branch,  even if default_variant is gcc44.

 The build breaks and there are gcc45 references in compiler linker flags:


 shell command "cd
 /opt/local/var/macports/build/_opt_local_var_macports_sources_svn.macports.org_trunk_dports_math_arpack/work/ARPACK
 &&  /usr/bin/ld -arch x86_64 -dynamic -dylib -single_module -dead_strip
 -x -all_load -L. -L/opt/local/lib/gcc45/x86_64 -L/opt/local/lib/gcc45
 -L/opt/local/lib  -dylib_install_name /opt/local/lib/libarpack.1.dylib
 -current_version 1  -compatibility_version 1  libarpack.a -o
 libarpack.1.dylib -latlas -llapack -lgfortran -lSystem" returned error 1


 I'm attaching a patch

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Ticket URL: <http://trac.macports.org/ticket/25138>
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