--- old/common/autoconf/spec.gmk.in	2018-04-13 08:33:14.560041589 -0700
+++ new/common/autoconf/spec.gmk.in	2018-04-13 08:33:14.475033974 -0700
@@ -128,10 +128,8 @@
   export LIB:=@VS_LIB@
 endif
 
-# The sys root where standard headers and libraries are found.
-# Usually not needed since the configure script should have
-# taken it into account already when setting CFLAGS et al.
-SYS_ROOT:=@SYS_ROOT@
+SYSROOT_CFLAGS := @SYSROOT_CFLAGS@
+SYSROOT_LDFLAGS := @SYSROOT_LDFLAGS@
 
 # Paths to the source code
 ADD_SRC_ROOT:=@ADD_SRC_ROOT@
@@ -293,7 +291,6 @@
 # Necessary additional compiler flags to compile X11
 X_CFLAGS:=@X_CFLAGS@
 X_LIBS:=@X_LIBS@
-OPENWIN_HOME:=@OPENWIN_HOME@
 
 # The lowest required version of macosx to enforce compatiblity for
 MACOSX_VERSION_MIN=@MACOSX_VERSION_MIN@