[MacPorts] #45811: gcc49: thread sanitizer is broken

[MacPorts]

#45811: gcc49: thread sanitizer is broken
-----------------------------+--------------------------------
 Reporter:  akim.demaille@…  |      Owner:  macports-tickets@…
     Type:  defect           |     Status:  new
 Priority:  Normal           |  Milestone:
Component:  ports            |    Version:  2.3.2
 Keywords:                   |       Port:  gcc49
-----------------------------+--------------------------------
 {{{
 $ echo "int main(){}" > foo.cc
 $ gcc-mp-4.9 -fsanitize=thread foo.cc
 Undefined symbols for architecture x86_64:
   "___tsan_init", referenced from:
       __GLOBAL__sub_I_00099_0_foo.cc in cckAoDmM.o
 ld: symbol(s) not found for architecture x86_64
 collect2: error: ld returned 1 exit status
 }}}

 See also #41366.

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Ticket URL: <https://trac.macports.org/ticket/45811>
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