[Buildroot] Forcing a kernel rebuild

[Buildroot] Forcing a kernel rebuild

[Brian Beattie]

I'm doing some kernel module development and need to rebuild the kernel
modules.  Now I can do this by setting the environment to use the
buildroot cross compiler and running make from within the
project_{ARCH}/${BOARD}/linux-2.4.24 directory, but I'd really like to
just run make from the buildroot directory and have all the cross
compile stuff taken care of.

If there is currently a way to force the kernel modules to be rebuilt I
have not found it, so I added some targets to target/linux/Makefile.in*
so that a "make linux26-touch" will touch .configured in the kernel
directory forcing a kernel and kernel modules recompile for the next
"make".  I have attached a patch for this and would be interested is
discussing this approach.  I'm open to any to get this functionality.

-- 
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting a bad thing?

Brian Beattie   LFS12947 | "Honor isn't about making the right choices.
beattie at beattie-home.net | It's about dealing with the consequences."
www.beattie-home.net     | -- Midori Koto

------------- Patch Follows ------------------
Index: target/linux/Makefile.in
===================================================================
--- target/linux/Makefile.in	(revision 22673)
+++ target/linux/Makefile.in	(working copy)
@@ -184,6 +184,9 @@
 	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) oldconfig
 	touch $@
 
+$(LINUX26_DIR)/.touch:
+	touch $(LINUX26_DIR)/.configured
+
 $(LINUX26_DIR)/.depend_done: $(LINUX26_DIR)/.configured
 	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) prepare
 	touch $@
@@ -230,6 +233,8 @@
 
 linux26-config: host-sed $(LINUX26_DIR)/.configured
 
+linux26-touch:	 $(LINUX26_DIR)/.touch
+
 linux26-update:
 	cp -dpf $(LINUX26_DIR)/.config $(LINUX26_KCONFIG)
 
Index: target/linux/Makefile.in.advanced
===================================================================
--- target/linux/Makefile.in.advanced	(revision 22673)
+++ target/linux/Makefile.in.advanced	(working copy)
@@ -378,6 +378,9 @@
 	$(MAKE) $(LINUX26_MAKE_FLAGS) -C $(LINUX26_DIR) prepare
 	touch $@
 
+$(LINUX26_DIR)/.touch:
+	touch $(LINUX26_DIR)/.configured
+
 $(LINUX26_DIR)/$(LINUX26_BINLOC): $(INITRAMFS_TARGET)
$(BB_INITRAMFS_TARGET) \
 		$(LINUX26_DIR)/.depend_done
 	$(MAKE) $(LINUX26_MAKE_FLAGS) \
@@ -451,6 +454,8 @@
 
 linux26-config: host-sed $(LINUX26_DIR)/.configured
 
+linux26-touch:	$(LINUX26_DIR)/.touch
+
 linux26-update:
 	cp -dpf $(LINUX26_DIR)/.config $(LINUX26_KCONFIG)
 

[Buildroot] Forcing a kernel rebuild

[Bernhard Fischer]

On Tue, Jul 08, 2008 at 11:42:37AM -0700, Brian Beattie wrote:
>I'm doing some kernel module development and need to rebuild the kernel
>modules.  Now I can do this by setting the environment to use the
>buildroot cross compiler and running make from within the
>project_{ARCH}/${BOARD}/linux-2.4.24 directory, but I'd really like to
>just run make from the buildroot directory and have all the cross
>compile stuff taken care of.
>
>If there is currently a way to force the kernel modules to be rebuilt I
>have not found it, so I added some targets to target/linux/Makefile.in*
>so that a "make linux26-touch" will touch .configured in the kernel
>directory forcing a kernel and kernel modules recompile for the next
>"make".  I have attached a patch for this and would be interested is
>discussing this approach.  I'm open to any to get this functionality.

I think you could simply
$ rm -f project_*/*/linux*/.modules_installed
$ make linux26-modules

Alternatively, i suggest to add a
index 22bbcb9..fd9844e 100644
--- a/target/linux/Makefile.in
+++ b/target/linux/Makefile.in
@@ -256,6 +256,9 @@ linux26-config: host-sed $(LINUX26_DIR)/.configured
 linux26-update:
        cp -dpf $(LINUX26_DIR)/.config $(LINUX26_KCONFIG)
 
+linux26-force:
+       touch $(LINUX26_DIR)/.configured
+
 # This has been renamed so we do _NOT_ by default run this on 'make
 # clean'
 linux26clean:
        rm -f $(LINUX26_KERNEL) $(LINUX26_DIR)/.configured


(which i did now) so you can
make linux26-force && make linux26

[Buildroot] Forcing a kernel rebuild

[Ulf Samuelsson]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Bernhard Fischer skrev:
> On Tue, Jul 08, 2008 at 11:42:37AM -0700, Brian Beattie wrote:
>> I'm doing some kernel module development and need to rebuild the kernel
>> modules.  Now I can do this by setting the environment to use the
>> buildroot cross compiler and running make from within the
>> project_{ARCH}/${BOARD}/linux-2.4.24 directory, but I'd really like to
>> just run make from the buildroot directory and have all the cross
>> compile stuff taken care of.
>>
>> If there is currently a way to force the kernel modules to be rebuilt I
>> have not found it, so I added some targets to target/linux/Makefile.in*
>> so that a "make linux26-touch" will touch .configured in the kernel
>> directory forcing a kernel and kernel modules recompile for the next
>> "make".  I have attached a patch for this and would be interested is
>> discussing this approach.  I'm open to any to get this functionality.
> 
> I think you could simply
> $ rm -f project_*/*/linux*/.modules_installed
> $ make linux26-modules
> 

Or you could ensure that the make modules inside
the linux26.mk has the "-B" switch.
I think this will force the rebuild of the modules,
without forcing the whole kernel to be rebuilt.
BR
Ulf Samuelsson



> Alternatively, i suggest to add a
> index 22bbcb9..fd9844e 100644
> --- a/target/linux/Makefile.in
> +++ b/target/linux/Makefile.in
> @@ -256,6 +256,9 @@ linux26-config: host-sed $(LINUX26_DIR)/.configured
>  linux26-update:
>         cp -dpf $(LINUX26_DIR)/.config $(LINUX26_KCONFIG)
>  
> +linux26-force:
> +       touch $(LINUX26_DIR)/.configured
> +
>  # This has been renamed so we do _NOT_ by default run this on 'make
>  # clean'
>  linux26clean:
>         rm -f $(LINUX26_KERNEL) $(LINUX26_DIR)/.configured
> 
> 
> (which i did now) so you can
> make linux26-force && make linux26
> _______________________________________________
> buildroot mailing list
> buildroot at uclibc.org
> http://busybox.net/mailman/listinfo/buildroot

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[Buildroot] Forcing a kernel rebuild

[Peter Korsgaard]

>>>>> "Bernhard" == Bernhard Fischer <rep.dot.nop@gmail.com> writes:

 Bernhard> (which i did now) so you can
 Bernhard> make linux26-force && make linux26

I've added it to svn as well (r22070) - Thanks.

-- 
Bye, Peter Korsgaard