dtc: Use pkg-config to locate libyaml
Using Makefile's wildcard with absolute path to detect the presence of libyaml results in false-positive detection when cross-compiling e.g. in yocto environment. The latter results in build error: | scripts/dtc/yamltree.o: In function `yaml_propval_int': | yamltree.c: undefined reference to `yaml_sequence_start_event_initialize' | yamltree.c: undefined reference to `yaml_emitter_emit' | yamltree.c: undefined reference to `yaml_scalar_event_initialize' ... Use pkg-config to locate libyaml to address this scenario. Signed-off-by: Pavel Modilaynen <pavel.modilaynen@axis.com> [robh: silence stderr] Signed-off-by: Rob Herring <robh@kernel.org>
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@ -11,7 +11,7 @@ dtc-objs += dtc-lexer.lex.o dtc-parser.tab.o
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# Source files need to get at the userspace version of libfdt_env.h to compile
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HOST_EXTRACFLAGS := -I $(srctree)/$(src)/libfdt
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ifeq ($(wildcard /usr/include/yaml.h),)
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ifeq ($(shell pkg-config --exists yaml-0.1 2>/dev/null && echo yes),)
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ifneq ($(CHECK_DTBS),)
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$(error dtc needs libyaml for DT schema validation support. \
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Install the necessary libyaml development package.)
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@ -19,7 +19,7 @@ endif
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HOST_EXTRACFLAGS += -DNO_YAML
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else
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dtc-objs += yamltree.o
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HOSTLDLIBS_dtc := -lyaml
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HOSTLDLIBS_dtc := $(shell pkg-config yaml-0.1 --libs)
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endif
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# Generated files need one more search path to include headers in source tree
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