[PATCH] use -iwithprefix to find gcc headers

[Christoph Hellwig]

Use -iwithprefix instead of my crude gcc -print-search-dirs hack to find
the directory where gcc puts stdarg.h.  Backport from 2.5.

diff -uNr -Xdontdiff -p linux-2.4.20-pre4/Makefile linux/Makefile
--- linux-2.4.20-pre4/Makefile	Tue Aug 20 11:36:59 2002
+++ linux/Makefile	Tue Aug 20 11:39:48 2002
@@ -260,7 +260,7 @@ include arch/$(ARCH)/Makefile
 # 'kbuild_2_4_nostdinc :=' or -I/usr/include for kernel code and you are not UML
 # then your code is broken!  KAO.
 
-kbuild_2_4_nostdinc	:= -nostdinc $(shell $(CC) -print-search-dirs | sed -ne 's/install: \(.*\)/-I \1include/gp')
+kbuild_2_4_nostdinc	:= -nostdinc -iwithprefix include
 export kbuild_2_4_nostdinc
 
 export	CPPFLAGS CFLAGS CFLAGS_KERNEL AFLAGS AFLAGS_KERNEL