[Buildroot] [PATCHv2] Makefile: make $(BUILD_DIR)/.root rule idempotent

[Peter Korsgaard]

>>>>> "Thomas" == Thomas Petazzoni <thomas.petazzoni at free-electrons.com> writes:

 Thomas> The $(BUILD_DIR)/.root rule is executed as part of the 'dirs'
 Thomas> target. The 'dirs' target is re-executed at every execution of 'make
 Thomas> external-deps', and make external-deps explicitly tells make to ignore
 Thomas> targets that have already been made (through the -B option). This
 Thomas> means that the $(BUILD_DIR)/.root rule has to be idempotant, which was
 Thomas> not the case this the introduction of the lib32/lib64 symbolic link.

 Thomas> Running 'make external-deps' three times in a row was sufficient to
 Thomas> trigger an error due to symbolic links being incorrectly created. This
 Thomas> patch fixes that.

 Thomas> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
 Thomas> ---
 Thomas> This should probably be taken for 2013.08.1 as a fix of 'make
 Thomas> external-deps'.

 Thomas> Changes since v1:

 Thomas>  * Posted separately from the toolchain source patch set
 Thomas>  * Use ln -snf instead of if tests.

Committed, thanks.

-- 
Bye, Peter Korsgaard