> Yepp. These warnings are there becuse of the way the list-style Makefiles
> work. You will see lots of them in drivers/net and drivers/scsi, too.
Here's a patch. Let me know if it works for you; if it does,
I will submit it for 2.4.0.
Here is some history: drivers/sound was the first of the list-style
Makefiles and has been using lists since the late 2.1.NN series.
Originally, drivers/sound/Makefile used $(sort ...) to remove duplicates.
In 2.3.14, Linus introduced init sections. This made $(sort ...)
unusable for the construction of O_OBJS and OX_OBJS.
Today, O_OBJS and OX_OBJS may contain duplicates, and Rules.make is
supposed to ignore the duplicates (while still preserving order).
The fact that SYMTAB_OBJS causes these warning messages is a bug.
I have written documentation on Rules.make and the interface between
Rules.make and Makefiles. It's here:
ftp://ftp.shout.net/pub/users/mec/kbuild/x-Dkm-9.diff
Here's a quote:
The order of files in $(O_OBJS) and $(OX_OBJS) is significant.
All $(OX_OBJS) files come first, in the order listed, followed by
all $(O_OBJS) files, in the order listed. Duplicates in the lists
are allowed: the first instance will be linked into $(O_TARGET)
and succeeding instances will be ignored. (Note: Rules.make may
emit warning messages for duplicates, but this is harmless).
I would really like to see this documentation in the kernel. I've sent
it to Linus three times, and he's ignored it three times. I will try
some more after the release of 2.4.0.
Anyways ... I'd appreciate it if a couple of people would try this patch
so that I can submit it.
Michael Elizabeth Chastain
<mailto:mec@shout.net>
"love without fear"
===
diff -u -r -N linux-2.4.0-test8/Rules.make linux/Rules.make
--- linux-2.4.0-test8/Rules.make Sun Aug 13 12:55:51 2000
+++ linux/Rules.make Sun Sep 10 14:06:02 2000
@@ -190,7 +190,7 @@
#
ifdef CONFIG_MODULES
-SYMTAB_OBJS = $(LX_OBJS) $(OX_OBJS) $(MX_OBJS) $(MIX_OBJS)
+SYMTAB_OBJS := $(sort $(LX_OBJS) $(OX_OBJS) $(MX_OBJS) $(MIX_OBJS))
ifdef CONFIG_MODVERSIONS
ifneq "$(strip $(SYMTAB_OBJS))" ""
-
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