From: Horst Schirmeier The kbuild-dont-put-temp-files-in-the-source-tree.patch (-mm patches) is implemented faultily and fails in its intention to put temporary files in $TMPDIR (or /tmp by default). This is the code as it results from the patch: ASTMP = $(shell mktemp ${TMPDIR:-/tmp}/asXXXXXX) as-instr = $(shell if echo -e "$(1)" | $(AS) >/dev/null 2>&1 -W -Z -o $ASTMP ; \ then echo "$(2)"; else echo "$(3)"; fi; \ rm -f $ASTMP) 1) $ needs to be escaped in the shell function call, otherwise make tries to substitute with a (in this case not existing) make variable with this name. 2) Makefile variable names need to be put in parentheses; $ASTMP is being interpreted as $(A)STMP, resulting in as-instr writing to a file named after whatever is in $(A), followed by "STMP". 3) ld-option also writes to a temporary file and needs the same treatment. Please consider using the corrected patch below instead. Alternatively, we could also simply use -o /dev/null, as we are not interested in the output anyways. Daniel Drake already suggested this in a LKML post (message-id 452F9602.1050906@gentoo.org). Cc: Andi Kleen Cc: Jan Beulich Cc: Sam Ravnborg Cc: Signed-off-by: Horst Schirmeier Signed-off-by: Andrew Morton --- scripts/Kbuild.include | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff -puN scripts/Kbuild.include~kbuild-dont-put-temp-files-in-the-source-tree-fix scripts/Kbuild.include --- a/scripts/Kbuild.include~kbuild-dont-put-temp-files-in-the-source-tree-fix +++ a/scripts/Kbuild.include @@ -66,10 +66,10 @@ as-option = $(shell if $(CC) $(CFLAGS) $ # as-instr # Usage: cflags-y += $(call as-instr, instr, option1, option2) -ASTMP = $(shell mktemp ${TMPDIR:-/tmp}/asXXXXXX) -as-instr = $(shell if echo -e "$(1)" | $(AS) >/dev/null 2>&1 -W -Z -o $ASTMP ; \ +ASTMP = $(shell mktemp $${TMPDIR:-/tmp}/asXXXXXX) +as-instr = $(shell if echo -e "$(1)" | $(AS) >/dev/null 2>&1 -W -Z -o $(ASTMP) ; \ then echo "$(2)"; else echo "$(3)"; fi; \ - rm -f $ASTMP) + rm -f $(ASTMP)) # cc-option # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) @@ -98,10 +98,11 @@ cc-ifversion = $(shell if [ $(call cc-ve # ld-option # Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both) +LDTMP = $(shell mktemp $${TMPDIR:-/tmp}/ldXXXXXX) ld-option = $(shell if $(CC) $(1) \ - -nostdlib -o ldtest$$$$.out -xc /dev/null \ + -nostdlib -o $(LDTMP) -xc /dev/null \ > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi; \ - rm -f ldtest$$$$.out) + rm -f $(LDTMP)) ### # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj= _