[XEN PATCH v7 51/51] build: add %.E targets

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

I guess it's easier to remember that %.E does "$(CC) -E" or "$(CPP)".

Suggested-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 xen/Makefile | 4 ++--
 xen/Rules.mk | 5 +++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/xen/Makefile b/xen/Makefile
index d27c213c3aa9..91b34d549970 100644
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -586,10 +586,10 @@ cscope:
 _MAP:
        $(NM) -n $(TARGET)-syms | grep -v '\(compiled\)\|\(\.o$$\)\|\( [aUw] 
\)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' > System.map
 
-%.o %.i %.s: %.c tools_fixdep FORCE
+%.o %.i %.s %.E: %.c tools_fixdep FORCE
        $(MAKE) $(build)=$(*D) $(*D)/$(@F)
 
-%.o %.s: %.S tools_fixdep FORCE
+%.o %.s %.E: %.S tools_fixdep FORCE
        $(MAKE) $(build)=$(*D) $(*D)/$(@F)
 
 %/: tools_fixdep FORCE
diff --git a/xen/Rules.mk b/xen/Rules.mk
index 6c97f539330a..7d6112a3cdec 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -289,6 +289,11 @@ $(obj)/%.s: $(src)/%.c FORCE
 $(obj)/%.s: $(src)/%.S FORCE
        $(call if_changed_dep,cpp_s_S)
 
+$(obj)/%.E: $(src)/%.c FORCE
+       $(call if_changed_dep,cpp_i_c)
+$(obj)/%.E: $(src)/%.S FORCE
+       $(call if_changed_dep,cpp_s_S)
+
 # Linker scripts, .lds.S -> .lds
 quiet_cmd_cpp_lds_S = LDS     $@
 cmd_cpp_lds_S = $(CPP) -P $(call cpp_flags,$(a_flags)) -DLINKER_SCRIPT -MQ $@ 
-o $@ $<
-- 
Anthony PERARD