[PATCH] sim: split CPPFLAGS between build & host

[Mike Frysinger <vapier@gentoo.org>]

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            | 5 ++++-
 sim/Makefile.in            | 5 ++++-
 sim/arch-subdir.mk.in      | 1 +
 sim/common/local.mk        | 1 +
 sim/configure              | 8 ++++++--
 sim/m4/sim_ac_toolchain.m4 | 3 +++
 6 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/sim/Makefile.am b/sim/Makefile.am
index 79537e779b3a..594c91ff19bd 100644
--- a/sim/Makefile.am
+++ b/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
diff --git a/sim/arch-subdir.mk.in b/sim/arch-subdir.mk.in
index 69a8e2f1e551..2c0e2bbce93d 100644
--- a/sim/arch-subdir.mk.in
+++ b/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@
diff --git a/sim/common/local.mk b/sim/common/local.mk
index 377ebe647308..65a375f349f7 100644
--- a/sim/common/local.mk
+++ b/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.
diff --git a/sim/m4/sim_ac_toolchain.m4 b/sim/m4/sim_ac_toolchain.m4
index 74532142929c..f3bcf463656e 100644
--- a/sim/m4/sim_ac_toolchain.m4
+++ b/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)
-- 
2.37.3