On 2006-10-30, <olecom@flower> wrote:
> Fix for roots:
> ,--
>|if [ `id -u` == "0" ]; then echo "Root landed !!!"; ! true; fi
> `--
> More polite fools-protection, with guaranteed permission from the user:
> ,--
>|if [ `id -u` == "0" ]; then useradd bkernel && su bkernel fi;
> `--
> ____
For current state of things, i wish to propose
kbuild-mm-more-option-check-fixes.pre-patch:
Request For Testing.
Interested parties may test this one.
$(ret) is used for debug. In final version it may be removed,
$(objtree)/null must be known for clean targets.
I've replaced one `echo -e' with `printf', because, for example, my shell is
not bash, and built-in `echo' have not `-e' option, `printf' works everywhere.
[trailing spaces killed: +1]
Any comments are appreciated.
____
--- linux-2.6.19-rc3-mm1/scripts/Kbuild.include 2006-10-28 01:26:25.000000000 +0000
+++ linux-2.6.19-rc3-mm1/scripts/Kbuild.include~more-option-check-fixes 2006-10-30 20:39:03.641018805 +0000
@@ -7,6 +7,15 @@ squote := '
empty :=
space := $(empty) $(empty)
+# Immortal null for mortals and roots
+define null
+ $(shell \
+ if test -L null; \
+ then echo null; \
+ else rm -f null; ln -s /dev/null null; \
+ fi)
+endef
+
###
# Name of target with a '.' as filename prefix. foo/bar.o => foo/.bar.o
dot-target = $(dir $@).$(notdir $@)
@@ -56,30 +65,46 @@ endef
# gcc support functions
# See documentation in Documentation/kbuild/makefiles.txt
+ret = echo "$(1)" ; echo "$(1)" >> results.txt
# as-option
# Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,)
-
-as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \
- -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \
- else echo "$(2)"; fi ;)
+define as-option
+ $(shell \
+ if $(CC) $(CFLAGS) $(1) -c -o $(null) -xassembler null >null 2>&1; \
+ then $(call ret,"$(1)"); \
+ else $(call ret,"$(2)"); \
+ fi)
+endef
# as-instr
# Usage: cflags-y += $(call as-instr, instr, option1, option2)
-
-as-instr = $(shell if echo -e "$(1)" | $(AS) >/dev/null 2>&1 -W -Z -o astest$$$$.out ; \
- then echo "$(2)"; else echo "$(3)"; fi; \
- rm -f astest$$$$.out)
+define as-instr
+ $(shell \
+ if printf "$(1)" | $(AS) >null 2>&1 -W -o $(null); \
+ then $(call ret,"$(2)"); \
+ else $(call ret,"$(3)"); \
+ fi)
+endef
# cc-option
# Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586)
-
-cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
- > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
+define cc-option
+ $(shell \
+ if $(CC) $(CFLAGS) $(1) -S -o $(null) -xc null >null 2>&1; \
+ then $(call ret,"$(1)"); \
+ else $(call ret,"$(2)"); \
+ fi)
+endef
# cc-option-yn
# Usage: flag := $(call cc-option-yn, -march=winchip-c6)
-cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
- > /dev/null 2>&1; then echo "y"; else echo "n"; fi;)
+define cc-option-yn
+ $(shell \
+ if $(CC) $(CFLAGS) $(1) -S -o $(null) -xc null >null 2>&1; \
+ then $(call ret,"y"); \
+ else $(call ret,"n"); \
+ fi)
+endef
# cc-option-align
# Prefix align with either -falign or -malign
@@ -97,10 +122,13 @@ cc-ifversion = $(shell if [ $(call cc-ve
# ld-option
# Usage: ldflags += $(call ld-option, -Wl$(comma)--hash-style=both)
-ld-option = $(shell if $(CC) $(1) \
- -nostdlib -o ldtest$$$$.out -xc /dev/null \
- > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi; \
- rm -f ldtest$$$$.out)
+define ld-option
+ $(shell \
+ if $(CC) $(1) -nostdlib -o $(null) -xc null >null 2>&1; \
+ then $(call ret,"$(1)"); \
+ else $(call ret,"$(2)"); \
+ fi)
+endef
###
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
@@ -120,7 +148,7 @@ cmd = @$(echo-cmd) $(cmd_$(1))
objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
###
-# if_changed - execute command if any prerequisite is newer than
+# if_changed - execute command if any prerequisite is newer than
# target, or command line has changed
# if_changed_dep - as if_changed, but uses fixdep to reveal dependencies
# including used config symbols
-
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