[build] prefer picking up sqlite3 from Darwin SDK for llbuild (swiftlang#28440)

* [build] prefer picking up sqlite3 from Darwin SDK for llbuild

When building llbuild on Darwin platforms, ensure that we prefer the SQLite from the SDK
instead of picking one found elsewhere (e.g. in /usr/include )
Also consider only the SQLite dylib shipped with the OS.

Addresses rdar://problem/57300418

Author: edymtt

utils/build-script-impl

@@ -2098,6 +2098,20 @@ for host in "${ALL_HOSTS[@]}"; do
                     -Ddispatch_DIR:PATH=$(build_directory ${host} libdispatch)/cmake/modules
                     -DFoundation_DIR:PATH=$(build_directory ${host} foundation)/cmake/modules
                 )
+
+                # Ensure on Darwin platforms that we consider only the SQLite headers
+                # from the SDK instead of picking ones found elsewhere
+                # (e.g. in /usr/include )
+                # Also consider only the SQLite dylib shipped with the OS
+                # to avoid mismatch with the headers
+                if [[ "$(uname -s)" = "Darwin" ]]; then
+                    cmake_options=(
+                        "${cmake_options[@]}"
+
+                        -DSQLite3_INCLUDE_DIR:PATH="$(xcrun -sdk macosx -show-sdk-path)/usr/include"
+                        -DSQLite3_LIBRARY:PATH="/usr/lib/libsqlite3.dylib"
+                    )
+                fi
                 ;;
             xctest)
                 SWIFTC_BIN="$(build_directory_bin ${LOCAL_HOST} swift)/swiftc"