1# src/template/darwin
2
3# Note: Darwin is the original code name for macOS, also known as OS X.
4# We still use "darwin" as the port name, partly because config.guess does.
5
6# Select where system include files should be sought, if user didn't say.
7if test x"$PG_SYSROOT" = x"" ; then
8  # This is far more complicated than it ought to be.  We first ask
9  # "xcrun --show-sdk-path", which seems to match the default -isysroot
10  # setting of Apple's compilers.
11  PG_SYSROOT=`xcrun --show-sdk-path 2>/dev/null`
12  # That may fail, or produce a result that is not version-specific (i.e.,
13  # just ".../SDKs/MacOSX.sdk").  Using a version-specific sysroot seems
14  # desirable, so if the path is a non-version-specific symlink, expand it.
15  if test -L "$PG_SYSROOT"; then
16    if expr x"$PG_SYSROOT" : '.*[0-9]\.[0-9][^/]*$' >/dev/null ; then : okay
17    else
18      PG_SYSROOT=`expr "$PG_SYSROOT" : '\(.*\)/'`/`readlink "$PG_SYSROOT"`
19    fi
20  fi
21  # If there are still not digits in the directory name, try
22  # "xcrun --sdk macosx --show-sdk-path"; and if that still doesn't work,
23  # fall back to asking xcodebuild, which is often a good deal slower.
24  if expr x"$PG_SYSROOT" : '.*[0-9]\.[0-9][^/]*$' >/dev/null ; then : okay
25  else
26    PG_SYSROOT=`xcrun --sdk macosx --show-sdk-path 2>/dev/null`
27    if expr x"$PG_SYSROOT" : '.*[0-9]\.[0-9][^/]*$' >/dev/null ; then : okay
28    else
29      PG_SYSROOT=`xcodebuild -version -sdk macosx Path 2>/dev/null`
30    fi
31  fi
32fi
33# Validate the result: if it doesn't point at a directory, ignore it.
34if test x"$PG_SYSROOT" != x"" ; then
35  if test -d "$PG_SYSROOT" ; then
36    CPPFLAGS="-isysroot $PG_SYSROOT $CPPFLAGS"
37    LDFLAGS="-isysroot $PG_SYSROOT $LDFLAGS"
38  else
39    PG_SYSROOT=""
40  fi
41fi
42
43# Extra CFLAGS for code that will go into a shared library
44CFLAGS_SL=""
45
46# Select appropriate semaphore support.  Darwin 6.0 (macOS 10.2) and up
47# support System V semaphores; before that we have to use named POSIX
48# semaphores, which are less good for our purposes because they eat a
49# file descriptor per backend per max_connection slot.
50case $host_os in
51  darwin[015].*)
52    USE_NAMED_POSIX_SEMAPHORES=1
53    ;;
54  *)
55    USE_SYSV_SEMAPHORES=1
56    ;;
57esac
58