I was building postgresql via Macports (with the debug flag on) and I saw this output -- including a notice to report this to pgsql-bugs@postgresql.org. So I'm doing so!
---> Configuring postgresql91 DEBUG: Using compiler 'Mac OS X llvm-gcc 4.2' DEBUG: Executing org.macports.configure (postgresql91) DEBUG: Environment: CPATH='/opt/local/include' CFLAGS='-pipe -O2 -arch x86_64' CPPFLAGS='-I/opt/local/include -I/opt/local/include/ossp' CXXFLAGS='-pipe -O2 -arch x86_64' LIBRARY_PATH='/opt/local/lib' MACOSX_DEPLOYMENT_TARGET='10.7' CXX='/Developer/usr/bin/llvm-g++-4.2' CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_Users_singingwolfboy_Dropbox_ports_databases_postgresql91/postgresql91/work/.CC_PRINT_OPTIONS' F90FLAGS='-pipe -O2 -m64' LDFLAGS='-L/opt/local/lib -arch x86_64' FCFLAGS='-pipe -O2 -m64' OBJC='/Developer/usr/bin/llvm-gcc-4.2' INSTALL='/usr/bin/install -c' PYTHON='/opt/local/bin/python2.7' OBJCFLAGS='-pipe -O2 -arch x86_64' FFLAGS='-pipe -O2 -m64' CC_PRINT_OPTIONS='YES' CC='/Developer/usr/bin/llvm-gcc-4.2' DEBUG: Assembled command: 'cd "/opt/local/var/macports/build/_Users_singingwolfboy_Dropbox_ports_databases_postgresql91/postgresql91/work/postgresql-9.1.1" && ./configure --prefix=/opt/local --sysconfdir=/opt/local/etc/postgresql91 --bindir=/opt/local/lib/postgresql91/bin --libdir=/opt/local/lib/postgresql91 --includedir=/opt/local/include/postgresql91 --datadir=/opt/local/share/postgresql91 --mandir=/opt/local/share/man --with-includes=/opt/local/include --with-libraries=/opt/local/lib --with-openssl --with-bonjour --with-readline --with-zlib --with-libxml --with-libxslt --enable-thread-safety --enable-integer-datetimes --with-ossp-uuid --with-python' DEBUG: Executing command line: cd "/opt/local/var/macports/build/_Users_singingwolfboy_Dropbox_ports_databases_postgresql91/postgresql91/work/postgresql-9.1.1" && ./configure --prefix=/opt/local --sysconfdir=/opt/local/etc/postgresql91 --bindir=/opt/local/lib/postgresql91/bin --libdir=/opt/local/lib/postgresql91 --includedir=/opt/local/include/postgresql91 --datadir=/opt/local/share/postgresql91 --mandir=/opt/local/share/man --with-includes=/opt/local/include --with-libraries=/opt/local/lib --with-openssl --with-bonjour --with-readline --with-zlib --with-libxml --with-libxslt --enable-thread-safety --enable-integer-datetimes --with-ossp-uuid --with-python checking build system type... x86_64-apple-darwin11.1.0 checking host system type... x86_64-apple-darwin11.1.0 checking which template to use... darwin checking whether to build with 64-bit integer date/time support... yes checking whether NLS is wanted... no checking for default port number... 5432 checking for block size... 8kB checking for segment size... 1GB checking for WAL block size... 8kB checking for WAL segment size... 16MB checking for C compiler default output file name... a.out checking whether the C compiler works... yes checking whether we are cross compiling... no checking for suffix of executables... checking for suffix of object files... o checking whether we are using the GNU C compiler... yes checking whether /Developer/usr/bin/llvm-gcc-4.2 accepts -g... yes checking for /Developer/usr/bin/llvm-gcc-4.2 option to accept ISO C89... none needed checking whether /Developer/usr/bin/llvm-gcc-4.2 supports -Wdeclaration-after-statement... yes checking whether /Developer/usr/bin/llvm-gcc-4.2 supports -Wendif-labels... yes checking whether /Developer/usr/bin/llvm-gcc-4.2 supports -Wformat-security... yes checking whether /Developer/usr/bin/llvm-gcc-4.2 supports -fno-strict-aliasing... yes checking whether /Developer/usr/bin/llvm-gcc-4.2 supports -fwrapv... yes checking whether the C compiler still works... yes checking how to run the C preprocessor... /Developer/usr/bin/llvm-gcc-4.2 -E checking allow thread-safe client libraries... yes checking whether to build with Tcl... no checking whether to build Perl modules... no checking whether to build Python modules... yes checking whether to build with GSSAPI support... no checking whether to build with Kerberos 5 support... no checking whether to build with PAM support... no checking whether to build with LDAP support... no checking whether to build with Bonjour support... yes checking whether to build with OpenSSL support... yes checking whether to build with SELinux support... no checking for xml2-config... xml2-config checking for grep that handles long lines and -e... /usr/bin/grep checking for egrep... /usr/bin/grep -E checking for ld used by GCC... /Developer/usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld checking if the linker (/Developer/usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld) is GNU ld... no checking for ranlib... ranlib checking for strip... strip checking whether it is possible to strip libraries... no checking for ar... ar checking for tar... /usr/bin/tar checking whether ln -s works... yes checking for gawk... no checking for mawk... no checking for nawk... no checking for awk... awk checking for a thread-safe mkdir -p... config/install-sh -c -d checking for bison... /opt/local/bin/bison configure: using bison (GNU Bison) 2.5 checking for flex... /usr/bin/flex configure: using flex 2.5.35 checking for perl... /opt/local/bin/perl configure: using perl 5.12.3 checking for python... /opt/local/bin/python2.7 checking for Python distutils module... yes checking Python configuration directory... /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config checking how to link an embedded Python application... -L/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config -lpython2.7 -ldl -framework CoreFoundation checking whether Python is compiled with thread support... yes checking for main in -lm... yes checking for library containing setproctitle... no checking for library containing dlopen... none required checking for library containing socket... none required checking for library containing shl_load... no checking for library containing getopt_long... none required checking for library containing crypt... none required checking for library containing fdatasync... none required checking for library containing gethostbyname_r... no checking for library containing shmget... none required checking for library containing readline... -lreadline checking for inflate in -lz... yes checking for CRYPTO_new_ex_data in -lcrypto... yes checking for SSL_library_init in -lssl... yes checking for xmlSaveToBuffer in -lxml2... yes checking for xsltCleanupGlobals in -lxslt... yes checking for uuid_export in -lossp-uuid... no checking for uuid_export in -luuid... yes checking for ANSI C header files... yes checking for sys/types.h... yes checking for sys/stat.h... yes checking for stdlib.h... yes checking for string.h... yes checking for memory.h... yes checking for strings.h... yes checking for inttypes.h... yes checking for stdint.h... yes checking for unistd.h... yes checking crypt.h usability... no checking crypt.h presence... no checking for crypt.h... no checking dld.h usability... no checking dld.h presence... no checking for dld.h... no checking fp_class.h usability... no checking fp_class.h presence... no checking for fp_class.h... no checking getopt.h usability... yes checking getopt.h presence... yes checking for getopt.h... yes checking ieeefp.h usability... no checking ieeefp.h presence... no checking for ieeefp.h... no checking ifaddrs.h usability... yes checking ifaddrs.h presence... yes checking for ifaddrs.h... yes checking langinfo.h usability... yes checking langinfo.h presence... yes checking for langinfo.h... yes checking poll.h usability... yes checking poll.h presence... yes checking for poll.h... yes checking pwd.h usability... yes checking pwd.h presence... yes checking for pwd.h... yes checking sys/ioctl.h usability... yes checking sys/ioctl.h presence... yes checking for sys/ioctl.h... yes checking sys/ipc.h usability... yes checking sys/ipc.h presence... yes checking for sys/ipc.h... yes checking sys/poll.h usability... yes checking sys/poll.h presence... yes checking for sys/poll.h... yes checking sys/pstat.h usability... no checking sys/pstat.h presence... no checking for sys/pstat.h... no checking sys/resource.h usability... yes checking sys/resource.h presence... yes checking for sys/resource.h... yes checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/sem.h usability... yes checking sys/sem.h presence... yes checking for sys/sem.h... yes checking sys/shm.h usability... yes checking sys/shm.h presence... yes checking for sys/shm.h... yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking sys/sockio.h usability... yes checking sys/sockio.h presence... yes checking for sys/sockio.h... yes checking sys/tas.h usability... no checking sys/tas.h presence... no checking for sys/tas.h... no checking sys/time.h usability... yes checking sys/time.h presence... yes checking for sys/time.h... yes checking sys/ucred.h usability... yes checking sys/ucred.h presence... yes checking for sys/ucred.h... yes checking sys/un.h usability... yes checking sys/un.h presence... yes checking for sys/un.h... yes checking termios.h usability... yes checking termios.h presence... yes checking for termios.h... yes checking ucred.h usability... no checking ucred.h presence... no checking for ucred.h... no checking utime.h usability... yes checking utime.h presence... yes checking for utime.h... yes checking wchar.h usability... yes checking wchar.h presence... yes checking for wchar.h... yes checking wctype.h usability... yes checking wctype.h presence... yes checking for wctype.h... yes checking kernel/OS.h usability... no checking kernel/OS.h presence... no checking for kernel/OS.h... no checking kernel/image.h usability... no checking kernel/image.h presence... no checking for kernel/image.h... no checking SupportDefs.h usability... no checking SupportDefs.h presence... no checking for SupportDefs.h... no checking for net/if.h... yes checking netinet/in.h usability... yes checking netinet/in.h presence... yes checking for netinet/in.h... yes checking for netinet/tcp.h... yes checking readline/readline.h usability... yes checking readline/readline.h presence... yes checking for readline/readline.h... yes checking readline/history.h usability... yes checking readline/history.h presence... yes checking for readline/history.h... yes checking zlib.h usability... yes checking zlib.h presence... yes checking for zlib.h... yes checking openssl/ssl.h usability... yes checking openssl/ssl.h presence... yes checking for openssl/ssl.h... yes checking openssl/err.h usability... yes checking openssl/err.h presence... yes checking for openssl/err.h... yes checking for ERR_set_mark... yes checking libxml/parser.h usability... yes checking libxml/parser.h presence... yes checking for libxml/parser.h... yes checking libxslt/xslt.h usability... yes checking libxslt/xslt.h presence... yes checking for libxslt/xslt.h... yes checking dns_sd.h usability... yes checking dns_sd.h presence... yes checking for dns_sd.h... yes checking ossp/uuid.h usability... no checking ossp/uuid.h presence... yes configure: WARNING: ossp/uuid.h: present but cannot be compiled configure: WARNING: ossp/uuid.h: check for missing prerequisite headers? configure: WARNING: ossp/uuid.h: see the Autoconf documentation configure: WARNING: ossp/uuid.h: section "Present But Cannot Be Compiled" configure: WARNING: ossp/uuid.h: proceeding with the preprocessor's result configure: WARNING: ossp/uuid.h: in the future, the compiler will take precedence configure: WARNING: ## ---------------------------------------- ## configure: WARNING: ## Report this to pgsql-bugs@postgresql.org ## configure: WARNING: ## ---------------------------------------- ## checking for ossp/uuid.h... yes checking whether byte ordering is bigendian... universal <snip> The compilation finished successfully, in spite of this warning. This is on an early 2008 Macbook Pro, 2.4GHz Intel Core 2 Duo processor, running Mac OS X Lion 10.7.1. Please let me know if you need any more information. -David Baumgold -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs