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| author | Sam Ravnborg <sam@mars.ravnborg.org> | 2006-08-08 21:35:14 +0200 |
|---|---|---|
| committer | Sam Ravnborg <sam@neptun.ravnborg.org> | 2006-09-25 09:01:49 +0200 |
| commit | 45d506bd65e2e35881d8276c111b647807823d19 (patch) | |
| tree | 8f53e4e58165fc2c7f62e17b31dfb77ef43d7dfc /Makefile | |
| parent | kbuild: modpost on vmlinux regardless of CONFIG_MODULES (diff) | |
| download | linux-45d506bd65e2e35881d8276c111b647807823d19.tar.xz linux-45d506bd65e2e35881d8276c111b647807823d19.zip | |
kbuild: make V=2 tell why a target is rebuild
tell why a a target got build
enabled by make V=2
Output (listed in the order they are checked):
(1) - due to target is PHONY
(2) - due to target missing
(3) - due to: file1.h file2.h
(4) - due to command line change
(5) - due to missing .cmd file
(6) - due to target not in $(targets)
(1) We always build PHONY targets
(2) No target, so we better build it
(3) Prerequisite is newer than target
(4) The command line stored in the file named dir/.target.cmd
differed from actual command line. This happens when compiler
options changes
(5) No dir/.target.cmd file (used to store command line)
(6) No dir/.target.cmd file and target not listed in $(targets)
This is a good hint that there is a bug in the kbuild file
This patch is inspired by a patch from: Milton Miller <miltonm@bga.com>
Cc: Milton Miller <miltonm@bga.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -1101,6 +1101,7 @@ help: echo '') @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' + @echo ' make V=2 [targets] 2 => give reason for rebuild of target' @echo ' make O=dir [targets] Locate all output files in "dir", including .config' @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse by default)' @echo ' make C=2 [targets] Force check of all c source with $$CHECK' |