sim: split CPPFLAGS between build & host

In order to merge more common/ files into the top-level, we need to
add more host flags to CPPFLAGS, and that conflicts with our current
use with build-time tools.  So split them apart like we do with all
other build flags to avoid the issue.

sim/Makefile.am

@@ -42,7 +42,10 @@ AM_CPPFLAGS = \
 	-I$(srcroot)/include \
 	$(SIM_INLINE)
 
-COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(AM_CPPFLAGS) $(CFLAGS_FOR_BUILD)
+AM_CPPFLAGS_FOR_BUILD = \
+	-I$(srcroot)/include \
+	$(SIM_INLINE)
+COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(AM_CPPFLAGS_FOR_BUILD) $(CPPFLAGS_FOR_BUILD) $(CFLAGS_FOR_BUILD)
 LINK_FOR_BUILD = $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(LDFLAGS_FOR_BUILD) -o $@
 
 ## Deps to add to the all-recursive target.  These are built before descending

sim/Makefile.in

@@ -741,6 +741,7 @@ CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
 CGEN_MAINT = @CGEN_MAINT@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
+CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
 CYGPATH_W = @CYGPATH_W@
 C_DIALECT = @C_DIALECT@
 DATADIRNAME = @DATADIRNAME@
@@ -945,7 +946,9 @@ MOSTLYCLEANFILES = core $(am__append_5) site-sim-config.exp \
 	$(am__append_34) $(am__append_37) $(am__append_39)
 AM_CFLAGS = $(WERROR_CFLAGS) $(WARN_CFLAGS)
 AM_CPPFLAGS = -I$(srcroot)/include $(SIM_INLINE) -I$(srcdir)/common
-COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(AM_CPPFLAGS) $(CFLAGS_FOR_BUILD)
+AM_CPPFLAGS_FOR_BUILD = -I$(srcroot)/include $(SIM_INLINE) \
+	-I$(srcdir)/common
+COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(AM_CPPFLAGS_FOR_BUILD) $(CPPFLAGS_FOR_BUILD) $(CFLAGS_FOR_BUILD)
 LINK_FOR_BUILD = $(CC_FOR_BUILD) $(CFLAGS_FOR_BUILD) $(LDFLAGS_FOR_BUILD) -o $@
 SIM_ALL_RECURSIVE_DEPS = common/libcommon.a $(am__append_2) \
 	$(am__append_6) $(am__append_8) $(am__append_11) \

sim/arch-subdir.mk.in

@@ -32,6 +32,7 @@ CC = @CC@
 C_DIALECT = @C_DIALECT@
 CC_FOR_BUILD = @CC_FOR_BUILD@
 CFLAGS_FOR_BUILD = @CFLAGS_FOR_BUILD@
+CPPFLAGS_FOR_BUILD = @CPPFLAGS_FOR_BUILD@
 CFLAGS = @CFLAGS@
 CPPFLAGS = @CPPFLAGS@
 LDFLAGS = @LDFLAGS@

sim/common/local.mk

@@ -19,6 +19,7 @@
 ## Most still lives in common/Make-common.in.
 
 AM_CPPFLAGS += -I$(srcdir)/%D%
+AM_CPPFLAGS_FOR_BUILD += -I$(srcdir)/%D%
 
 ## This makes sure common parts are available before building the arch-subdirs
 ## which will refer to these.

sim/configure

@@ -903,6 +903,7 @@ PKG_CONFIG
 RANLIB
 AR
 LDFLAGS_FOR_BUILD
+CPPFLAGS_FOR_BUILD
 CFLAGS_FOR_BUILD
 RANLIB_FOR_BUILD
 CC_FOR_BUILD
@@ -4999,12 +5000,14 @@ if test "x$cross_compiling" = "xno"; then
   : "${CC_FOR_BUILD:=\$(CC)}"
   : "${RANLIB_FOR_BUILD:=\$(RANLIB)}"
   : "${CFLAGS_FOR_BUILD:=\$(CFLAGS)}"
+  : "${CPPFLAGS_FOR_BUILD:=\$(CPPFLAGS)}"
   : "${LDFLAGS_FOR_BUILD:=\$(LDFLAGS)}"
 else
   : "${AR_FOR_BUILD:=ar}"
   : "${CC_FOR_BUILD:=gcc}"
   : "${RANLIB_FOR_BUILD:=ranlib}"
   : "${CFLAGS_FOR_BUILD:=-g -O}"
+  : "${CPPFLAGS_FOR_BUILD:=}"
   : "${LDLFAGS_FOR_BUILD:=}"
 fi
 
@@ -5014,6 +5017,7 @@ fi
 
 
 
+
 if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
 set dummy ${ac_tool_prefix}ar; ac_word=$2
@@ -12771,7 +12775,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12774 "configure"
+#line 12778 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12877,7 +12881,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 12880 "configure"
+#line 12884 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H

sim/m4/sim_ac_toolchain.m4

@@ -32,18 +32,21 @@ if test "x$cross_compiling" = "xno"; then
   : "${CC_FOR_BUILD:=\$(CC)}"
   : "${RANLIB_FOR_BUILD:=\$(RANLIB)}"
   : "${CFLAGS_FOR_BUILD:=\$(CFLAGS)}"
+  : "${CPPFLAGS_FOR_BUILD:=\$(CPPFLAGS)}"
   : "${LDFLAGS_FOR_BUILD:=\$(LDFLAGS)}"
 else
   : "${AR_FOR_BUILD:=ar}"
   : "${CC_FOR_BUILD:=gcc}"
   : "${RANLIB_FOR_BUILD:=ranlib}"
   : "${CFLAGS_FOR_BUILD:=-g -O}"
+  : "${CPPFLAGS_FOR_BUILD:=}"
   : "${LDLFAGS_FOR_BUILD:=}"
 fi
 AC_SUBST(AR_FOR_BUILD)
 AC_SUBST(CC_FOR_BUILD)
 AC_SUBST(RANLIB_FOR_BUILD)
 AC_SUBST(CFLAGS_FOR_BUILD)
+AC_SUBST(CPPFLAGS_FOR_BUILD)
 AC_SUBST(LDFLAGS_FOR_BUILD)
 
 AC_SUBST(CFLAGS)