[MacPorts] #30455: cairo-1.10.2_4+x11 does not build due to LLVM ERROR: Cannot yet select: 0x10392e210: f64 = ConstantFP<0.000000e+00> [ORD=117] [ID=4]

[MacPorts]

#30455: cairo-1.10.2_4+x11 does not build due to LLVM ERROR: Cannot yet select:
0x10392e210: f64 = ConstantFP<0.000000e+00> [ORD=117] [ID=4]
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 Reporter:  Peter_Dyballa@…           |       Owner:  ryandesign@…           
     Type:  defect                    |      Status:  new                    
 Priority:  Normal                    |   Milestone:                         
Component:  ports                     |     Version:  2.0.0                  
 Keywords:                            |        Port:  cairo                  
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Comment(by Peter_Dyballa@…):

 It seems that since months (March 2011) LLVM GCC without any fix from
 Apple® emits wrong code when compiling on a Sandy Bridge iCore i5 or i7.
 It might work to give LLVM GCC the two options "-mtune=core2
 -march=core2". I don't know how to put it into the Portfile.

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Ticket URL: <https://trac.macports.org/ticket/30455#comment:8>
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