+universal oddities

[Jeremy Lavergne]

Got an issue in port:unbound when built +universal. Suspiciously,
-D_THREAD_SAFE goes away and double data types start showing up (e.g.,
unsigned unsigned).

Any suggestions?

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Comment(by snc at ...):

 This is the normal test:
 `configure:16789: /Developer/usr/bin/llvm-gcc-4.2 -c -pipe -O2 -arch
x86_64 -g -O2 -flto -D_THREAD_SAFE  -I/opt/local/include
 -I/opt/local/include conftest.c >&5`

 This is the universal test:
 `configure:16789: /Developer/usr/bin/llvm-gcc-4.2 -c -pipe -O2 -arch
x86_64 -arch i386 -g -O2 -flto -I/opt/local/include -I/opt/local/include
-I/opt/local/include conftest.c >&5`

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Ticket URL: <https://trac.macports.org/ticket/31137>