BUG #6641: uuid.h warning during configure

The following bug has been logged on the website:

Bug reference: 6641
Logged by: Chris Ruprecht
Email address: chris(at)cdrbill(dot)com
PostgreSQL version: 9.1.3
Operating system: Mac OS X 10.7.4
Description:

running configure as such:

export MACOSX_DEPLOYMENT_TARGET=10.7
export CC=gcc
export CPP="gcc -E"
export CXX=g++
export CXXFLAGS='-O3 -fno-common -arch x86_64'
export CFLAGS='-O3 -fno-common -arch x86_64'
export LDFLAGS='-O3 -fno-common -arch x86_64'

./configure \
--prefix=/usr/local \
--enable-integer-datetimes \
--enable-thread-safety \
--with-libxml \
--with-libxslt \
--with-ossp-uuid \
--with-tcl \
--with-perl \
--with-python \
--with-gssapi \
--with-krb5 \
--with-pam \
--with-ldap \
--with-bonjour \
--with-openssl \
--with-zlib

During the configuration phase, I get this message:

checking uuid.h presence... yes
configure: WARNING: uuid.h: present but cannot be compiled
configure: WARNING: uuid.h: check for missing prerequisite headers?
configure: WARNING: uuid.h: see the Autoconf documentation
configure: WARNING: uuid.h: section "Present But Cannot Be Compiled"
configure: WARNING: uuid.h: proceeding with the preprocessor's result
configure: WARNING: uuid.h: in the future, the compiler will take
precedence
configure: WARNING: ## ---------------------------------------- ##
configure: WARNING: ## Report this to pgsql-bugs(at)postgresql(dot)org ##
configure: WARNING: ## ---------------------------------------- ##
checking for uuid.h... yes