BUG #7483: uuid-ossp does not compile on OS X 10.8

The following bug has been logged on the website:

Bug reference: 7483
Logged by: Douglas Carmichael
Email address: dcarmich(at)dcarmichael(dot)net
PostgreSQL version: 9.1.4
Operating system: OS X 10.8 (Mountain Lion)
Description:

I'm compiling PostgreSQL 9.1.4 on OS X 10.8, and the uuid-ossp extension
doesn't compile properly, as follows:

:info:build /usr/bin/clang -pipe -O2 -arch x86_64 -Wall -Wmissing-prototypes
-Wp
ointer-arith -Wdeclaration-after-statement -Wendif-labels -Wformat-security
-fno
-strict-aliasing -fwrapv -I. -I. -I../../src/include -I/opt/local/include
-I/op
t/local/include/ossp -I/opt/local/include/libxml2 -I/opt/local/include -c
-o u
uid-ossp.o uuid-ossp.c
:info:build In file included from uuid-ossp.c:24:
:info:build In file included from /opt/local/include/ossp/uuid.h:38:
:info:build /usr/include/unistd.h:689:26: error: expected identifier
:info:build int gethostuuid(uuid_t, const struct timespec *)
__OSX_AVAILABL
E_STARTING(__MAC_10_5, __IPHONE_2_0);
:info:build ^
:info:build In file included from uuid-ossp.c:24:
:info:build /opt/local/include/ossp/uuid.h:94:24: error: typedef
redefinition wi
th different types ('struct uuid_st' vs '__darwin_uuid_t' (aka 'unsigned
char [16]'))
:info:build typedef struct uuid_st uuid_t;
:info:build ^
:info:build /usr/include/uuid/uuid.h:42:25: note: previous definition is
here
:info:build typedef __darwin_uuid_t uuid_t;
:info:build ^
:info:build In file included from uuid-ossp.c:24:
:info:build /opt/local/include/ossp/uuid.h:107:22: error: conflicting types
for 'uuid_compare'
:info:build extern uuid_rc_t uuid_compare (const uuid_t *_uuid, const
uuid_t *_uuid2, int *_result);
:info:build ^
:info:build /usr/include/uuid/uuid.h:59:5: note: previous declaration is
here
:info:build int uuid_compare(const uuid_t uu1, const uuid_t uu2);
:info:build ^
:info:build 3 errors generated.
:info:build gnumake: *** [uuid-ossp.o] Error 1

I'm compiling using MacPorts (http://www.macports.org/), and I've also
reported this to them.