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yaml: Depend on libyaml >= 0.2.3

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libyaml before 0.2.3 expects non-const string parameters. Supporting
both variants would require either cpp magic or ignoring
"discarded-qualifiers" compiler warnings. For the sake of simplicity
just support libyaml 0.2.3 and newer.

Note that NO_YAML can be overwritten on the make command line.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
This commit is contained in:
Uwe Kleine-König 2023-04-28 11:35:50 +02:00 • committed by David Gibson
parent f1657b2fb5
commit 0ac8b30ba5
3 changed files with 7 additions and 3 deletions
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6
Makefile
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@ -55,7 +55,11 @@ else
CFLAGS += $(shell $(PKG_CONFIG) --cflags valgrind)
endif
NO_YAML := $(shell $(PKG_CONFIG) --exists yaml-0.1; echo $$?)
# libyaml before version 0.2.3 expects non-const string parameters. Supporting
# both variants would require either cpp magic or passing
# -Wno-error=discarded-qualifiers to the compiler. For the sake of simplicity
# just support libyaml >= 0.2.3.
NO_YAML := $(shell $(PKG_CONFIG) --atleast-version 0.2.3 yaml-0.1; echo $$?)
ifeq ($(NO_YAML),1)
CFLAGS += -DNO_YAML
else