kbuild: find stdarg.h in a new way

[Sam Ravnborg]

stdarg.h is a compiler specific file.
Following patch is more explicit about how to find this file.
In this way we also share the definition with sparse.

	Sam



kbuild: Use -isystem `gcc --print-file-name=include`
   
   Using "-nostdinc -isystem `gcc --print-file-name=include" let
   us see full path to compiler specific files when compiling with make V=1
   Furthermore it lets us use same definition for sparse (CHECKFLAGS) and the kernel.
   Tested with gcc 3.3.4 only.
   
   Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>

   
diff -Nru a/Makefile b/Makefile
--- a/Makefile	2004-12-29 00:21:09 +01:00
+++ b/Makefile	2004-12-29 00:21:09 +01:00
@@ -330,7 +330,10 @@
 KALLSYMS	= scripts/kallsyms
 PERL		= perl
 CHECK		= sparse
+
+NOSTDINC_FLAGS := -nostdinc -isystem $(shell $(CC) -print-file-name=include)
 CHECKFLAGS     := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__
+CHECKFLAGS     += $(NOSTDINC_FLAGS)
 MODFLAGS	= -DMODULE
 CFLAGS_MODULE   = $(MODFLAGS)
 AFLAGS_MODULE   = $(MODFLAGS)
@@ -338,7 +341,6 @@
 CFLAGS_KERNEL	=
 AFLAGS_KERNEL	=
 
-NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 
 # Use LINUXINCLUDE when you must reference the include/ directory.
 # Needed to be compatible with the O= option
diff -Nru a/scripts/Makefile.build b/scripts/Makefile.build
--- a/scripts/Makefile.build	2004-12-29 00:21:09 +01:00
+++ b/scripts/Makefile.build	2004-12-29 00:21:09 +01:00
@@ -83,7 +83,6 @@
 
 # Linus' kernel sanity checking tool
 ifneq ($(KBUILD_CHECKSRC),0)
-  CHECKFLAGS += -I$(shell $(CC) -print-file-name=include)
   ifeq ($(KBUILD_CHECKSRC),2)
     quiet_cmd_force_checksrc = CHECK   $<
           cmd_force_checksrc = $(CHECK) $(CHECKFLAGS) $(c_flags) $< ;
-
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