qcom-base.inc: enable tarballs as additional image format

Enable `tar.gz` to be able to populate external media like microSD cards
a bit easier. OE-core has `tar.gz` as its default, but BSP layers tend
to overwrite that, so DISTROs need to use `:append` to ensure the
desired types get generated.

Gzip has been picked over xz because of its speed, both in compression
as in decompression. With `pigz` installed it scales linearly with the
number of CPU cores, removing it as the bottleneck.

Signed-off-by: Koen Kooi <[email protected]>

Author: koenkooi

conf/distro/include/qcom-base.inc

@@ -27,8 +27,10 @@ IMAGE_FSTYPES += "qcomflash"
 # Set a default package class to avoid surprises
 PACKAGE_CLASSES = "package_ipk"
 
-# Avoid to duplicate the rootfs tarball by generating both tar.gz/tar.xz
-IMAGE_FSTYPES:remove = "tar.gz"
+# Force tarballs being generated, some BSP layers overwrite
+# IMAGE_FSTYPES, so this appends 'tar.gz' regardless of what the BSP
+# tried to remove
+IMAGE_FSTYPES:append = " tar.gz"
 
 # Pull in the initrd image by default
 INITRAMFS_IMAGE_BUNDLE ?= "1"