postgresql/src/template/darwin

# $PostgreSQL: pgsql/src/template/darwin,v 1.11 2007/09/26 00:32:46 tgl Exp $

# Apple's cpp-precomp seems a tad broken, so don't use it
# (Note: on OS X before 10.2, you might need -traditional-cpp instead)
CC="$CC -no-cpp-precomp"

# Select appropriate semaphore support.  Darwin 6.0 (Mac OS X 10.2) and up
# support System V semaphores; before that we have to use POSIX semaphores,
# which are less good for our purposes because they eat a file descriptor
# per backend per max_connection slot.
case $host_os in
  darwin[015].*)
    USE_NAMED_POSIX_SEMAPHORES=1
    ;;
  *)
    USE_SYSV_SEMAPHORES=1
    ;;
esac
Use SYSV semaphores rather than POSIX on Darwin >= 6.0 (i.e., OS X 10.2 and up), per Chris Marcellino. This avoids consuming O(N^2) file descriptors to support N backends. Tests suggest it's about a wash for small installations, but large ones would have a problem. 2007-09-25 20:32:46 -04:00			`# $PostgreSQL: pgsql/src/template/darwin,v 1.11 2007/09/26 00:32:46 tgl Exp $`
Add CVS tag lines to files that were lacking them. 2006-03-10 23:38:42 -05:00
Latest version of gcc from Apple does not work well with -traditional-cpp (it rejects some system header files...). Use -no-cpp-precomp instead. I think it is okay to change this unconditionally, but if we hear complaints from people still using very old compilers on Darwin, we could put in a test to see which switch the compiler likes. 2003-09-19 16:47:59 -04:00			`# Apple's cpp-precomp seems a tad broken, so don't use it`
			`# (Note: on OS X before 10.2, you might need -traditional-cpp instead)`
			`CC="$CC -no-cpp-precomp"`
Create an internal semaphore API that is not tied to SysV semaphores. As proof of concept, provide an alternate implementation based on POSIX semaphores. Also push the SysV shared-memory implementation into a separate file so that it can be replaced conveniently. 2002-05-04 20:03:29 -04:00
Use SYSV semaphores rather than POSIX on Darwin >= 6.0 (i.e., OS X 10.2 and up), per Chris Marcellino. This avoids consuming O(N^2) file descriptors to support N backends. Tests suggest it's about a wash for small installations, but large ones would have a problem. 2007-09-25 20:32:46 -04:00			`# Select appropriate semaphore support. Darwin 6.0 (Mac OS X 10.2) and up`
			`# support System V semaphores; before that we have to use POSIX semaphores,`
			`# which are less good for our purposes because they eat a file descriptor`
			`# per backend per max_connection slot.`
			`case $host_os in`
			`darwin[015].*)`
			`USE_NAMED_POSIX_SEMAPHORES=1`
			`;;`
			`*)`
			`USE_SYSV_SEMAPHORES=1`
			`;;`
			`esac`