[MacPorts] #30388: mono fails to build on 10.7

[MacPorts]

#30388: mono fails to build on 10.7
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 Reporter:  rb@…               |       Owner:  macports-tickets@…                   
     Type:  defect             |      Status:  new                                  
 Priority:  Normal             |   Milestone:                                       
Component:  ports              |     Version:  2.0.0                                
 Keywords:  lion               |        Port:  mono                                 
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Comment(by reid@…):

 After adding _XOPEN_SOURCE as above, I get this:

 …

 mini-amd64.c: In function ‘mono_arch_skip_single_step’:
 mini-amd64.c:8521: warning: cast to pointer from integer of different size
 mini-amd64.c:8521: warning: cast from pointer to integer of different size
 mini-amd64.c: In function ‘cpuid’:
 mini-amd64.c:1244: error: can't find a register in class ‘BREG’ while
 reloading ‘asm’
 mini-amd64.c:1244: error: ‘asm’ operand has impossible constraints
 make[4]: *** [libmono_2_0_la-mini-amd64.lo] Error 1
 make[4]: Leaving directory
 `/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_devel_mono/mono/work/mono-2.10.6/mono/mini'
 ...

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Ticket URL: <https://trac.macports.org/ticket/30388#comment:13>
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