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| author | Denys Vlasenko | 2009-11-26 05:25:24 +0100 |
|---|---|---|
| committer | Denys Vlasenko | 2009-11-26 05:25:24 +0100 |
| commit | fa1e7177fbd442f15e31cf96113b582753764de7 (patch) | |
| tree | 71034a6be4a50fbe63a6a5421223c5c4f337c3ec /scripts | |
| parent | b2e5fc35ebc127e2a1ac03c7ff0719b1e6b6cd6b (diff) | |
| download | busybox-fa1e7177fbd442f15e31cf96113b582753764de7.zip busybox-fa1e7177fbd442f15e31cf96113b582753764de7.tar.gz | |
build system: fix for coarse mtime problem
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/kconfig/Makefile | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index f56863f..b5708e2 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -17,11 +17,28 @@ menuconfig: $(obj)/mconf config: $(obj)/conf $< Config.in +# Mtime granularity problem. +# It was observed that these commands: +# make allnoconfig; sed -i -e '/CONFIG_TRUE/s/.*/CONFIG_TRUE=y/' .config; make +# sometimes produce busybox with "true" applet still disabled. +# This is caused by .config updated by sed having mtime which is still +# equal to (not bigger than) include/autoconf.h's mtime, +# and thus 2nd make does not regenerate include/autoconf.h. +# Waiting for 1 second after non-interactive "make XXXXconfig" +# prevents this from happening. +# +# We'd like to detect whether filesystem we are on has coarse mtimes, +# but can't do it yet, bbox ls hasn't got --full-time. +#MTIME_IS_COARSE:=@ls --full-time -ld | grep -F .000 >/dev/null +MTIME_IS_COARSE:=@true + oldconfig: $(obj)/conf $< -o Config.in + $(MTIME_IS_COARSE) && sleep 1 silentoldconfig: $(obj)/conf $< -s Config.in + $(MTIME_IS_COARSE) && sleep 1 update-po-config: $(obj)/kxgettext xgettext --default-domain=linux \ @@ -46,15 +63,19 @@ PHONY += randconfig allyesconfig allnoconfig allmodconfig defconfig randconfig: $(obj)/conf $< -r Config.in + $(MTIME_IS_COARSE) && sleep 1 allyesconfig: $(obj)/conf $< -y Config.in + $(MTIME_IS_COARSE) && sleep 1 allnoconfig: $(obj)/conf $< -n Config.in + $(MTIME_IS_COARSE) && sleep 1 allmodconfig: $(obj)/conf $< -m Config.in + $(MTIME_IS_COARSE) && sleep 1 defconfig: $(obj)/conf ifeq ($(KBUILD_DEFCONFIG),) @@ -63,9 +84,11 @@ else @echo *** Default configuration is based on '$(KBUILD_DEFCONFIG)' $(Q)$< -D $(KBUILD_DEFCONFIG) Config.in endif + $(MTIME_IS_COARSE) && sleep 1 %_defconfig: $(obj)/conf $(Q)$< -D $@ Config.in + $(MTIME_IS_COARSE) && sleep 1 # Help text used by make help help: |