Hello All
Just discovered something, wanted to share, might be that many out there will be knowing this, for the unknowns sharing this:
We do few source file change and then end up building the entire stuff using "make" command. Mid way through the build we see that a single annoying COMPILE ERROR and see its such a waste of time.
So the ideal thing is to just compile and link only the changed file which will be quick and rest assured FULL the build will succeed. So here's how it is to be done:
In my below example I am building the Sensor file which is in the path, kernel/drivers/hwmon: *The build command is:* make -C ../out/target/product/snowball/obj/kernel/ SUBDIRS=drivers/hwmon ARCH=arm CROSS_COMPILE=arm-eabi-
*Replace the "drivers/hwmon" to your location where the file you modified is present and it builds.*
For eg: venkatr@build1:~/snowball_board_branch_0.0.3/kernel$ vim drivers/hwmon/lsm303dlh_m.c venkatr@build1:~/snowball_board_branch_0.0.3/kernel$ make -C ../out/target/product/snowball/obj/kernel/ SUBDIRS=drivers/hwmon ARCH=arm CROSS_COMPILE=arm-eabi- make: Entering directory `/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel' make -C /u/home01/venkatr/snowball_board_branch_0.0.3/kernel O=/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel/.
CC drivers/hwmon/lsm303dlh_m.o LD drivers/hwmon/built-in.o Building modules, stage 2. MODPOST 0 modules make: Leaving directory `/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel' venkatr@build1:~/snowball_board_branch_0.0.3/kernel$
BR, Venkat.
Hi Sir,
Thanks for giving this solution. I used to waste lot of time building the entire stuff using make command.
I tried with your solution and it works and saves lot of time for us.
On Wed, May 16, 2012 at 9:47 AM, Venkat Raghavulu < venkat.raghavulu@asmaitha.com> wrote:
Hello All
Just discovered something, wanted to share, might be that many out there will be knowing this, for the unknowns sharing this:
We do few source file change and then end up building the entire stuff using "make" command. Mid way through the build we see that a single annoying COMPILE ERROR and see its such a waste of time.
So the ideal thing is to just compile and link only the changed file which will be quick and rest assured FULL the build will succeed. So here's how it is to be done:
In my below example I am building the Sensor file which is in the path, kernel/drivers/hwmon: *The build command is:* make -C ../out/target/product/snowball/obj/kernel/ SUBDIRS=drivers/hwmon ARCH=arm CROSS_COMPILE=arm-eabi-
*Replace the "drivers/hwmon" to your location where the file you modified is present and it builds.*
For eg: venkatr@build1:~/snowball_board_branch_0.0.3/kernel$ vim drivers/hwmon/lsm303dlh_m.c venkatr@build1:~/snowball_board_branch_0.0.3/kernel$ make -C ../out/target/product/snowball/obj/kernel/ SUBDIRS=drivers/hwmon ARCH=arm CROSS_COMPILE=arm-eabi- make: Entering directory `/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel' make -C /u/home01/venkatr/snowball_board_branch_0.0.3/kernel O=/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel/.
CC drivers/hwmon/lsm303dlh_m.o LD drivers/hwmon/built-in.o Building modules, stage 2. MODPOST 0 modules make: Leaving directory `/u/home01/venkatr/snowball_board_branch_0.0.3/out/target/product/snowball/obj/kernel' venkatr@build1:~/snowball_board_branch_0.0.3/kernel$
BR, Venkat.
kernel mailing list kernel@igloocommunity.org http://igloocommunity.org/cgi-bin/mailman/listinfo/kernel
On Wed, 2012-05-16 at 09:47 +0530, Venkat Raghavulu wrote:
Hello All
Just discovered something, wanted to share, might be that many out there will be knowing this, for the unknowns sharing this:
We do few source file change and then end up building the entire stuff using "make" command. Mid way through the build we see that a single annoying COMPILE ERROR and see its such a waste of time.
So the ideal thing is to just compile and link only the changed file which will be quick and rest assured FULL the build will succeed. So here's how it is to be done:
In my below example I am building the Sensor file which is in the path, kernel/drivers/hwmon: *The build command is:* make -C ../out/target/product/snowball/obj/kernel/ SUBDIRS=drivers/hwmon ARCH=arm CROSS_COMPILE=arm-eabi-
*Replace the "drivers/hwmon" to your location where the file you modified is present and it builds.*
Or specify the target object you want to make, so for a source file...
make ARCH=arm CROSS_COMPILE=arm-eabi- drivers/hwmon/lsm303dlh_m.o
or for a loadable module
make ARCH=arm CROSS_COMPILE=arm-eabi- drivers/foo/bar.ko
Though, once you've done a failed make once, and corrected the source code, I would have thought then next make would take next to no time for the objects it had already built and so wouldn't be worth doing these shortcuts. (Perhaps I just lucky to have a fast machine with a decent amount of RAM.)
-
Chetan C.R. -
Jon Medhurst (Tixy) -
Venkat Raghavulu