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Build: add GZIP compression filter

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One typical usage of the pre-tool image filter is data compression,
and GZIP is one of the most commonly used compression methods.
I guess this is generic enough to be put in the common script instead
of platform.mk.

If you want to use this, you can add something like follows to your
platform.mk:

    BL32_PRE_TOOL_FILTER := GZIP
    BL33_PRE_TOOL_FILTER := GZIP

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2018-01-26 11:42:01 +09:00
parent 2da522bb4e
commit 14db8908bc
1 changed files with 13 additions and 0 deletions
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13
make_helpers/build_macros.mk
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@ -170,6 +170,19 @@ check_$(1):
$$(if $(wildcard $(value $(_V))),,$$(error '$(_V)=$(value $(_V))' was specified, but '$(value $(_V))' does not exist))
endef
################################################################################
# Generic image processing filters
################################################################################
# GZIP
define GZIP_RULE
$(1): $(2)
@echo " GZIP $$@"
$(Q)gzip -n -f -9 $$< --stdout > $$@
endef
GZIP_SUFFIX := .gz
################################################################################
# Auxiliary macros to build TF images from sources
################################################################################