Need to use !include, not just include

src/build/Common.bmake

@@ -175,6 +175,9 @@ CIOLIB_SRC	=	$(SRC_ROOT)$(DIRSEP)conio
 SMBLIB_SRC	=	$(SRC_ROOT)$(DIRSEP)smblib
 UIFC_SRC	=	$(SRC_ROOT)$(DIRSEP)uifc
 
+# Pull in lib-specific flags
+!include     $(CIOLIB_SRC)$(DIRSEP)Common.make
+
 .path.c		=	.;$(XPDEV_SRC);$(SMBLIB_SRC);$(CIOLIB_SRC);$(UIFC_SRC)
 .path.cpp	=	.;$(XPDEV_SRC);$(SMBLIB_SRC);$(CIOLIB_SRC);$(UIFC_SRC)
 

src/build/Common.gmake

@@ -218,6 +218,9 @@ CIOLIB_SRC	:=	$(SRC_ROOT)$(DIRSEP)conio
 SMBLIB_SRC	:=	$(SRC_ROOT)$(DIRSEP)smblib
 UIFC_SRC	:=	$(SRC_ROOT)$(DIRSEP)uifc
 
+# Pull in lib-specific flags
+include		$(CIOLIB_SRC)$(DIRSEP)Common.make
+
 ifdef DEBUG
  CFLAGS	+=	-ggdb
  CFLAGS	+=	-D_DEBUG