Messages in this thread Patch in this message | | | Date | Thu, 27 Jul 2006 12:17:09 +0200 | From | Andreas Mohr <> | Subject | Re: [WARNING -mm] 2.6.18-rc2-mm1 build kills /dev/null!? |
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Hi,
On Thu, Jul 27, 2006 at 12:11:28PM +0200, Andreas Mohr wrote: > Hello all, > > for some reason a 2.6.18-rc2-mm1 build seems to kill my /dev/null device!
Replying to myself, this could easily be due to:
--- linux-2.6.18-rc2/scripts/Kbuild.include 2006-07-15 21:41:08.000000000 - 0700 +++ devel/scripts/Kbuild.include 2006-07-27 01:15:54.000000000 -0700 @@ -8,9 +8,13 @@ empty := space := $(empty) $(empty)
### +# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o +dot-target = $(dir $@).$(notdir $@) + +### # The temporary file to save gcc -MD generated dependencies must not # contain a comma -depfile = $(subst $(comma),_,$(@D)/.$(@F).d) +depfile = $(subst $(comma),_,$(dot-target).d)
### # filename of target with directory and extension stripped @@ -59,6 +63,12 @@ as-option = $(shell if $(CC) $(CFLAGS) $ -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \ else echo "$(2)"; fi ;)
+# as-instr +# Usage: cflags-y += $(call as-instr, instr, option1, option2) + +as-instr = $(shell if echo -e "$(1)" | $(AS) -Z -o /dev/null \ + 2>&1 >/dev/null ; then echo "$(2)"; else echo "$(3)"; fi;) + # cc-option # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
@@ -77,14 +87,19 @@ cc-option-align = $(subst -functions=0,,
# cc-version # Usage gcc-ver := $(call cc-version, $(CC)) -cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ - $(if $(1), $(1), $(CC))) +cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
# cc-ifversion # Usage: EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1) cc-ifversion = $(shell if [ $(call cc-version, $(CC)) $(1) $(2) ]; then \ echo $(3); fi;)
+# ld-option +# Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) +ld-option = $(shell if $(CC) $(1) \ + -nostdlib -o /dev/null -xc /dev/null \ + > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi) +
Possibly an older binutils doesn't have a "if *output* file /dev/null, then kill output instead of overwriting file" check builtin as IIRC newer utils often have?
# which ld /usr/bin/ld # rpm -qf /usr/bin/ld binutils-2.15.92.0.2-5
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