diff -purN -x CVS u-boot/config.mk u-boot-trigraph_fix/config.mk
--- u-boot/config.mk	Tue Sep 16 19:06:06 2003
+++ u-boot-trigraph_fix/config.mk	Fri Jan  9 14:41:51 2004
@@ -122,6 +122,14 @@ else
 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
 endif
 
+# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
+# this option have to be placed behind -Wall -- that's why it is here
+ifeq ($(ARCH),nios)
+ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
+CFLAGS := $(CPPFLAGS) -Wno-trigraphs
+endif
+endif
+
 AFLAGS_DEBUG := -Wa,-gstabs
 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)