Foundation: add new CPP definition for macOS

PR#4870 introduced a new CPP macro to allow building on non-threaded
systems, but in the process regressed the macOS build. Add the requisite
macro to enable the builds to function properly.

Author: compnerd

Foundation.xcodeproj/project.pbxproj

@@ -3437,6 +3437,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3478,6 +3479,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3536,6 +3538,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3592,6 +3595,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3649,6 +3653,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3709,6 +3714,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3749,6 +3755,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3790,6 +3797,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -3967,6 +3975,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -4044,6 +4053,7 @@
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
 					"-DHAVE_STRUCT_TIMESPEC",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -4110,6 +4120,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",
@@ -4159,6 +4170,7 @@
 					"-DCF_BUILDING_CF",
 					"-DDEPLOYMENT_RUNTIME_SWIFT",
 					"-DDEPLOYMENT_ENABLE_LIBDISPATCH",
+					"-DSWIFT_CORELIBS_FOUNDATION_HAS_THREADS",
 					"-I$(SRCROOT)/bootstrap/common/usr/include",
 					"-I$(SRCROOT)/bootstrap/x86_64-apple-darwin/usr/include",
 					"-I$(SRCROOT)/bootstrap/common/usr/local/include",