[Buildroot] [PATCH 6/7] Makefile: add check that $(HOST_DIR)/usr is not a directory
thomas.petazzoni at free-electrons.com
Mon Jul 10 16:02:40 UTC 2017
On Mon, 10 Jul 2017 01:21:22 +0200, Arnout Vandecappelle
> We create a compatibility symlink for $(HOST_DIR)/usr. However, if
> that exists already as a directory, the link can't be created. Make
> will not even try since it exists already and has no dependencies. If
> it exists as a directory, any post-build script that is still using
> $(HOST_DIR)/usr will fail to find what it needs. Therefore, add a
> check that it is not a directory.
> This check has to be made as part of some PHONY target. We can reuse
> the dirs target, on which all packages depend.
> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout at mind.be>
> Cc: Yann E. MORIN <yann.morin.1998 at free.fr>
> Personally I don't think it's important enough to add such a check.
> If someone ends up in this situation, they'll be motivated to fix
> their post-build scripts :-)
I also don't like very much adding such checks. In which situation can
our users fall into this problem?
They have an existing Buildroot tree, they do "git pull" and do a
partial rebuild ?
> diff --git a/Makefile b/Makefile
> index 188ce9adc7..a94555d130 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -542,6 +542,11 @@ endif
> .PHONY: dirs
> dirs: $(BUILD_DIR) $(STAGING_DIR) $(TARGET_DIR) \
> $(HOST_DIR) $(HOST_DIR)/usr $(BINARIES_DIR)
> + @if [ -d "$(HOST_DIR)/usr" -a ! -L "$(HOST_DIR)/usr" ]; then \
> + printf '%s is not allowed to be a directory\n' "$(HOST_DIR)/usr" 1>&2; \
> + printf 'Please remove this directory and rebuild\n' 1>&2; \
What about saying "Please run make clean all" ?
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
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