[MacPorts] #56836: py-cairo: build fails on < 10.7 due to error: #pragma GCC diagnostic not allowed inside functions

[MacPorts]

#56836: py-cairo: build fails on < 10.7 due to error: #pragma GCC diagnostic not
allowed inside functions
--------------------+----------------------
 Reporter:  kencu   |      Owner:  (none)
     Type:  defect  |     Status:  new
 Priority:  Normal  |  Milestone:
Component:  ports   |    Version:
 Keywords:          |       Port:  py-cairo
--------------------+----------------------
 The compiler selection for `py-cairo` leads to `gcc-4.2` being used on
 these older systems, and `gcc-4.2` doesn't understand the above GCC
 diagnostic inside functions.

 <https://build.macports.org/builders/ports-10.5_ppc_legacy-
 builder/builds/68721/steps/install-port/logs/stdio>

 <https://build.macports.org/builders/ports-10.6_x86_64_legacy-
 builder/builds/69944/steps/install-dependencies/logs/stdio>

 Fix is to move the `#pragma` outside of the function, or to use a newer
 compiler (I tried `gcc6` and that works, and any `clang` version works)

-- 
Ticket URL: <https://trac.macports.org/ticket/56836>
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