Sam,
This piece of the top-level Makefile in current git causes an
out-of-tree driver Makefile to fail.
101 ifdef O
102 ifeq ("$(origin O)", "command line")
103 KBUILD_OUTPUT := $(O)
104 endif
105 endif
The out-of-tree driver Makefile contains an O=... directive that
(correctly) does _not_ specify the kernel source dir, and apparently
isn't overridden by the command line either. If in the above Makefile
snippet I change "command line" to "file", my out-of-tree make
succeeds. What do you think about allowing O= to come from a file in
addition to the command line?
Here are my attempts:
[jcliburn@osprey atl1-2.0.7-20071202]$ make
make -C /lib/modules/2.6.24-rc3/source O=/lib/modules/2.6.24-rc3/build SUBDIRS=/home/jcliburn/atl1/atl1-2.0.7-20071202 modules
make[1]: Entering directory `/home/jcliburn/kernel-work/netdev/netdev-2.6.git'
Makefile:119: *** Output directory (O=...) specifies kernel src dir. Stop.
make[1]: Leaving directory `/home/jcliburn/kernel-work/netdev/netdev-2.6.git'
make: *** [default] Error 2
[jcliburn@osprey atl1-2.0.7-20071202]$ make O=/lib/modules/2.6.24-rc3/build
make -C /lib/modules/2.6.24-rc3/source O=/lib/modules/2.6.24-rc3/build SUBDIRS=/home/jcliburn/atl1/atl1-2.0.7-20071202 modules
make[1]: Entering directory `/home/jcliburn/kernel-work/netdev/netdev-2.6.git'
Makefile:119: *** Output directory (O=...) specifies kernel src dir. Stop.
make[1]: Leaving directory `/home/jcliburn/kernel-work/netdev/netdev-2.6.git'
make: *** [default] Error 2
Thanks for your help.
Jay
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