Re: build -->/usr/src/linux

[Miquel van Smoorenburg]

In article <[e-mail]>,
Jamie Lokier  <[e-mail]> wrote:
>Miquel van Smoorenburg wrote:
>> .. but there should be a cleaner way to get at the CFLAGS used
>> to compile the kernel.
>
>There is a way though I'd not call it clean.  Here is an extract from

Do you think something like this is the correct approach? If it
was part of the official kernel you could write a Makefile like this:

KSRC = /lib/modules/`uname -r`/build
include $(KSRC)/include/config.mak

CFLAGS := $(CFLAGS) $(MODFLAGS)

module.c:  module.h

--- linux-2.2.19.orig/Makefile	Mon Apr  9 13:01:37 2001
+++ linux-2.2.19/Makefile	Mon Apr  9 13:20:21 2001
@@ -325,7 +325,8 @@
 MODFLAGS += -DMODVERSIONS -include $(HPATH)/linux/modversions.h
 endif
 
-modules: include/config/MARKER $(patsubst %, _mod_%, $(SUBDIRS))  
+modules: include/config/MARKER $(patsubst %, _mod_%, $(SUBDIRS))  \
+		include/linux/config.mak
 
 $(patsubst %, _mod_%, $(SUBDIRS)) : include/linux/version.h
 	$(MAKE) -C $(patsubst _mod_%, %, $@) CFLAGS="$(CFLAGS) $(MODFLAGS)" MAKING_MODULES=1 modules
@@ -380,6 +381,31 @@
 	@exit 1
 endif
 
+include/linux/config.mak: ./Makefile
+	@echo "VERSION		= $(VERSION)" > .mak
+	@echo "PATCHLEVEL	= $(PATCHLEVEL)" >> .mak
+	@echo "SUBLEVEL	= $(SUBLEVEL)" >> .mak
+	@echo "EXTRAVERSION	= $(EXTRAVERSION)" >> .mak
+	@echo "ARCH		= $(ARCH)" >> .mak
+	@echo "HOSTCC		= $(HOSTCC)" >> .mak
+	@echo "HOSTCFLAGS	= $(HOSTCFLAGS)" >> .mak
+	@echo "CROSS_COMPILE	= $(CROSS_COMPILE)" >> .mak
+	@echo "AS		= $(AS)" >> .mak
+	@echo "LD		= $(LD)" >> .mak
+	@echo "CC		= $(CC)" >> .mak
+	@echo "CPP		= $(CPP)" >> .mak
+	@echo "AR		= $(AR)" >> .mak
+	@echo "NM		= $(NM)" >> .mak
+	@echo "STRIP		= $(STRIP)" >> .mak
+	@echo "OBJCOPY		= $(OBJCOPY)" >> .mak
+	@echo "OBJDUMP		= $(OBJDUMP)" >> .mak
+	@echo "MAKE		= $(MAKE)" >> .mak
+	@echo "GENKSYMS	= $(GENKSYMS)" >> .mak
+	@echo "CFLAGS		= $(CFLAGS)" >> .mak
+	@echo "AFLAGS		= $(AFLAGS)" >> .mak
+	@echo "MODFLAGS	= $(MODFLAGS)" >> .mak
+	@mv -f .mak $@
+
 clean:	archclean
 	rm -f kernel/ksyms.lst include/linux/compile.h
 	rm -f core `find . -name '*.[oas]' ! \( -regex '.*lxdialog/.*' \
@@ -398,6 +424,7 @@
 
 mrproper: clean archmrproper
 	rm -f include/linux/autoconf.h include/linux/version.h
+	rm -f include/linux/config.mak
 	rm -f drivers/net/hamradio/soundmodem/sm_tbl_{afsk1200,afsk2666,fsk9600}.h
 	rm -f drivers/net/hamradio/soundmodem/sm_tbl_{hapn4800,psk4800}.h
 	rm -f drivers/net/hamradio/soundmodem/sm_tbl_{afsk2400_7,afsk2400_8}.h

Mike.