# Note: Darwin is the original code name for macOS, also known as OS X.

# We still use "darwin" as the port name, partly because config.guess does.

# Select where system include files should be sought.

# Select where system include files should be sought, if user didn't say.

if test x"$PG_SYSROOT" = x"" ; then

PG_SYSROOT=`xcodebuild -version -sdk macosx Path 2>/dev/null`

# This is far more complicated than it ought to be. We first ask

# "xcrun --show-sdk-path", which seems to match the default -isysroot

# setting of Apple's compilers. However, that may produce no result or

# a result that is not version-specific (i.e., just ".../SDKs/MacOSX.sdk").

# Using a version-specific sysroot seems desirable, so if there are not

# digits in the directory name, try "xcrun --sdk macosx --show-sdk-path";

# and if that still doesn't work, fall back to asking xcodebuild,

# which is often a good deal slower.

PG_SYSROOT=`xcrun --show-sdk-path 2>/dev/null`

if expr x"$PG_SYSROOT" : '.*[0-9]\.[0-9][^/]*$' >/dev/null ; then : okay

else

PG_SYSROOT=`xcrun --sdk macosx --show-sdk-path 2>/dev/null`

if expr x"$PG_SYSROOT" : '.*[0-9]\.[0-9][^/]*$' >/dev/null ; then : okay

else

PG_SYSROOT=`xcodebuild -version -sdk macosx Path 2>/dev/null`

fi

fi

fi

#Old xcodebuild versions may produce garbage, so validate the result.

#Validate the result: if it doesn't point at a directory, ignore it.

if test x"$PG_SYSROOT" != x"" ; then

if test -d "$PG_SYSROOT" ; then

CPPFLAGS="-isysroot $PG_SYSROOT $CPPFLAGS"