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authorArnout Vandecappelle (Essensium/Mind) <arnout@mind.be>2013-02-05 07:16:02 +0000
committerPeter Korsgaard <jacmet@sunsite.dk>2013-02-05 21:43:51 +0100
commit1ed4996346c6504241c7a2c7541fefc914790219 (patch)
tree9bb9783b406ea8ea76c915bd5ec2f2ff17d3eec1 /docs/manual/customize-store.txt
parentf026d3642d9ea3bcbc85f2f1ab302a3e35eaa0de (diff)
downloadbuildroot-novena-1ed4996346c6504241c7a2c7541fefc914790219.tar.gz
buildroot-novena-1ed4996346c6504241c7a2c7541fefc914790219.zip
Make savedefconfig save to a configured file.
Store BR2_DEFCONFIG in .config, and use it to update the original input defconfig file after updating the configuration. When a config is created by using the BR2_DEFCONFIG=... option, this is saved in the .config file; later runs of savedefconfig will update that same location. It is also possible to configure this place in the interactive configuration. The BR2_DEFCONFIG value itself is not saved into the generated defconfig, since Kconfig considers it at its default. This is intentional, to avoid hard-coding an absolute path in the defconfig. It will anyway be set again when the defconfig is used with the 'make BR2_DEFCONFIG=... defconfig' command. As a side-effect of this change, the *config options have been moved out of the BR2_HAVE_DOT_CONFIG condition. This doesn't make any functional difference, because the .config is still not read for the *config targets. However, the defconfig and savedefconfig targets do need to include .config now, which makes them slightly slower. [Peter: slightly tweak help text] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be> Acked-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Diffstat (limited to 'docs/manual/customize-store.txt')
-rw-r--r--docs/manual/customize-store.txt10
1 files changed, 6 insertions, 4 deletions
diff --git a/docs/manual/customize-store.txt b/docs/manual/customize-store.txt
index 298b5e96a..63ea82dcf 100644
--- a/docs/manual/customize-store.txt
+++ b/docs/manual/customize-store.txt
@@ -20,13 +20,15 @@ Buildroot configuration
^^^^^^^^^^^^^^^^^^^^^^^
For storing the buildroot configuration itself, buildroot offers the
-following command: +make savedefconfig+
+following command: +make savedefconfig+.
This strips the buildroot configuration down by removing configuration
options that are at their default value. The result is stored in a file
-called +defconfig+. Copy this file to +foo_defconfig+ in the +configs+
-directory. The configuration can then be rebuilt by running
-+make foo_defconfig+
+called +defconfig+. If you want to save it in another place, change
+the +BR2_DEFCONFIG+ option, or call make with +make savedefconfig
+BR2_DEFCONFIG=<path-to-defconfig>+. The usual place is
++configs/<boardname>_defconfig+. The configuration can then be rebuilt by
+running +make <boardname>_defconfig+.
Alternatively, you can copy the file to any other place and rebuild with
+make defconfig BR2_DEFCONFIG=<path-to-defconfig-file>+.