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| author | Simon Glass <sjg@chromium.org> | 2016-11-13 14:25:52 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-12-02 10:37:47 -0700 |
| commit | 94d2ebe5bcbbbd15e879ee2204e037f321d66b68 (patch) | |
| tree | 4bf0da7e889d3018699701682a5f85e2bea31ce2 /tools/buildman/README | |
| parent | b50113f373a95d28cf001eb20adc6ef56f8ba14c (diff) | |
buildman: Add documentation for CONFIG checking
The -K option is not mentioned in the README at present. Add some notes
to describe how this is used.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'tools/buildman/README')
| -rw-r--r-- | tools/buildman/README | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tools/buildman/README b/tools/buildman/README index 514bebc9f8..89df94db73 100644 --- a/tools/buildman/README +++ b/tools/buildman/README @@ -968,6 +968,43 @@ of the source tree, thus allowing rapid tested evolution of the code. SOURCE_DATE_EPOCH=0 ./tools/buildman/buildman -I -P tegra +Checking configuration +====================== + +A common requirement when converting CONFIG options to Kconfig is to check +that the effective configuration has not changed due to the conversion. +Buildman supports this with the -K option, used after a build. This shows +differences in effective configuration between one commit and the next. + +For example: + + $ buildman -b kc4 -sK + ... + 43: Convert CONFIG_SPL_USBETH_SUPPORT to Kconfig + arm: + + u-boot.cfg: CONFIG_SPL_ENV_SUPPORT=1 CONFIG_SPL_NET_SUPPORT=1 + + u-boot-spl.cfg: CONFIG_SPL_MMC_SUPPORT=1 CONFIG_SPL_NAND_SUPPORT=1 + + all: CONFIG_SPL_ENV_SUPPORT=1 CONFIG_SPL_MMC_SUPPORT=1 CONFIG_SPL_NAND_SUPPORT=1 CONFIG_SPL_NET_SUPPORT=1 + am335x_evm_usbspl : + + u-boot.cfg: CONFIG_SPL_ENV_SUPPORT=1 CONFIG_SPL_NET_SUPPORT=1 + + u-boot-spl.cfg: CONFIG_SPL_MMC_SUPPORT=1 CONFIG_SPL_NAND_SUPPORT=1 + + all: CONFIG_SPL_ENV_SUPPORT=1 CONFIG_SPL_MMC_SUPPORT=1 CONFIG_SPL_NAND_SUPPORT=1 CONFIG_SPL_NET_SUPPORT=1 + 44: Convert CONFIG_SPL_USB_HOST_SUPPORT to Kconfig + ... + +This shows that commit 44 enabled three new options for the board +am335x_evm_usbspl which were not enabled in commit 43. There is also a +summary for 'arm' showing all the changes detected for that architecture. +In this case there is only one board with changes, so 'arm' output is the +same as 'am335x_evm_usbspl'/ + +The -K option uses the u-boot.cfg, spl/u-boot-spl.cfg and tpl/u-boot-tpl.cfg +files which are produced by a build. If all you want is to check the +configuration you can in fact avoid doing a full build, using -D. This tells +buildman to configuration U-Boot and create the .cfg files, but not actually +build the source. This is 5-10 times faster than doing a full build. + + Other options ============= |