To quote .config into config.c for building the result into the code, use sed
instead of perl, as requested by one "embedded" UML user (which notes that
perl is a big requirement, while busybox provides sed which is used in this
patch).
I've tested that there are only cosmethical differences in the produced
config.c file, which don't change at all the result (i.e. "a" is replaced by
"" "a" at the beginning, which is non-significant).
Reported by, and initial patch provided by, Rob Landley.
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Index: linux-2.6.11/arch/um/kernel/Makefile
===================================================================
--- linux-2.6.11.orig/arch/um/kernel/Makefile 2005-03-08 20:17:35.000000000
-0500
+++ linux-2.6.11/arch/um/kernel/Makefile 2005-03-08 22:19:21.000000000
-0500
@@ -4,7 +4,7 @@
#
extra-y := vmlinux.lds
-clean-files := vmlinux.lds.S
+clean-files := vmlinux.lds.S config.tmp
obj-y = checksum.o config.o exec_kern.o exitcode.o \
helper.o init_task.o irq.o irq_user.o ksyms.o main.o mem.o mem_user.o \
@@ -34,11 +34,25 @@
$(USER_OBJS) : %.o: %.c
$(CC) $(USER_CFLAGS) $(CFLAGS_$(notdir $@)) -c -o $@ $<
-QUOTE = 'my $$config=`cat $(TOPDIR)/.config`; $$config =~ s/"/\\"/g ; $$config
=~ s/\n/\\n"\n"/g ; while(<STDIN>) { $$_ =~ s/CONFIG/$$config/; print $$_ }'
+targets += config.c
-quiet_cmd_quote = QUOTE $@
-cmd_quote = $(PERL) -e $(QUOTE) < $< > $@
+# Be careful with the below Sed code - sed is pitfall-rich!
+# We use sed to lower build requirements, for "embedded" builders for instance.
-targets += config.c
-$(obj)/config.c : $(src)/config.c.in $(TOPDIR)/.config FORCE
- $(call if_changed,quote)
+$(obj)/config.tmp: $(objtree)/.config FORCE
+ $(call if_changed,quote1)
+
+quiet_cmd_quote1 = QUOTE $@
+ cmd_quote1 = sed -e 's/"/\\"/g' -e 's/^/"/' -e 's/$$/\\n"/' \
+ $< > $@
+
+$(obj)/config.c: $(src)/config.c.in $(obj)/config.tmp FORCE
+ $(call if_changed,quote2)
+
+quiet_cmd_quote2 = QUOTE $@
+ cmd_quote2 = sed -e '/CONFIG/{' \
+ -e 's/"CONFIG"\;/""/' \
+ -e 'r $(obj)/config.tmp' \
+ -e 'a""\;' \
+ -e '}' \
+ $< > $@
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