[Buildroot] Bug in "package: add generic support for lz archives" ?

[Thomas Petazzoni <thomas.petazzoni@free-electrons.com>]

Hello,

On Sun, 12 Feb 2017 22:15:39 +0200, Baruch Siach wrote:
> This commit teaches the generic package handling code how to extract .tar.lz
> archives. When lzip is not installed on the host, host-lzip gets built
> automatically.
> 
> Signed-off-by: Baruch Siach <baruch@tkos.co.il>

This patch causes a regression: it seems to build host-lzip
unconditionally on systems that lack it, even if host-lzip is not
needed at all to uncompress some tarballs.

Take for example:

BR2_x86_64=y
BR2_x86_atom=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_TOOLCHAIN_EXTERNAL_CUSTOM=y
BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD=y
BR2_TOOLCHAIN_EXTERNAL_URL="http://autobuild.buildroot.org/toolchains/tarballs/br-x86-64-musl-2017.02-rc1-2-g133c5ac.tar.bz2"
BR2_TOOLCHAIN_EXTERNAL_GCC_5=y
BR2_TOOLCHAIN_EXTERNAL_HEADERS_4_9=y
BR2_TOOLCHAIN_EXTERNAL_CUSTOM_MUSL=y
BR2_TOOLCHAIN_EXTERNAL_CXX=y
BR2_INIT_NONE=y
BR2_SYSTEM_BIN_SH_NONE=y
# BR2_PACKAGE_BUSYBOX is not set
BR2_PACKAGE_TCL=y
BR2_PACKAGE_EXPECT=y
# BR2_TARGET_ROOTFS_TAR is not set

Nothing is .lz compressed in there, and still, it builds host-lzip at
the beginning of the build:

>>> host-lzip 1.18 Extracting
>>> host-lzip 1.18 Patching
>>> host-lzip 1.18 Configuring
>>> host-lzip 1.18 Building
>>> host-lzip 1.18 Installing to host directory
>>> skeleton  Extracting
>>> skeleton  Patching
>>> skeleton  Configuring
>>> skeleton  Building
>>> skeleton  Installing to staging directory
>>> skeleton  Fixing libtool files
>>> skeleton  Installing to target

Could you have a look ?

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com