|author||Sam Ravnborg <firstname.lastname@example.org>||2006-08-08 21:35:14 +0200|
|committer||Sam Ravnborg <email@example.com>||2006-09-25 09:01:49 +0200|
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 <firstname.lastname@example.org> Cc: Milton Miller <email@example.com> Signed-off-by: Sam Ravnborg <firstname.lastname@example.org>
Diffstat (limited to 'Makefile')
1 files changed, 1 insertions, 0 deletions
@@ -1101,6 +1101,7 @@ help:
@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'