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authorSam Ravnborg <sam@ravnborg.org>2009-09-20 12:24:55 +0200
committerSam Ravnborg <sam@ravnborg.org>2009-09-20 12:24:55 +0200
commit575543347b5baed0ca927cb90ba8807396fe9cc9 (patch)
tree2ca85e5c092edef5a779562ebf227b6449e21f6f /usr/Makefile
parentcaa27b66bd7188fd063769eaf4b33533ef0709e6 (diff)
downloadlinux-stericsson-575543347b5baed0ca927cb90ba8807396fe9cc9.tar.gz
kbuild: save ARCH & CROSS_COMPILE when building a kernel
When building a kernel for a different architecture kbuild requires the user always to specify ARCH and CROSS_COMPILE on the command-line. We use the asm symlink to detect if user forgets to specify the correct ARCH value - but that symlink is about to die. And we do now want to loose this check. This patch save the settings of ARCH and CROSS_COMPILE in two files named: include/generated/kernel.arch include/generated/kernel.cross The settings are saved during "make *config" time and always read. If user try to change the settings we error out. This works both for plain builds and for O=... builds. So now you can do: $ mkdir sparc64 $ make O=sparc64 ARCH=sparc64 CROSS_COMPILE=sparc64-linux- defconfig $ cd sparc64 $ make Notice that you no longer need to tell kbuild the settings of ARCH and CROSS_COMPILE when you type make in the output directory. Likewise for plain builds where you do not use O=... Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roland McGrath <roland@redhat.com>
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