hc-gen: Add recipe for building OpenHarmony hc-gen tool

The hc-gen tool is used to convert HDF (Hardware Driver Foundation)
configuration source files (.hcs) to HDF configuration binary files (.hcb).

Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>

recipes-devtools/hc-gen/files/cxx-and-flags.patch

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+Use $CXX, $CXXFLAGS and $LDFLAGS environment variables, for proper Bitbake
+integration.
+
+Signed-off-by: Esben Haabendal <esben.haabendal@huawei.com>
+Upstream-Status: Inappropriate
+
+--- a/Makefile
++++ b/Makefile
+@@ -2,9 +2,9 @@ Q = @
+ BUILD_DIR := build
+ TARGET := $(BUILD_DIR)/hc-gen
+ 
+-CXX := c++
+-CXX_FLAGS := -std=gnu++14
+-CXX_LD_FLAGS := -lstdc++
++CXX ?= c++
++CXX_FLAGS := -std=gnu++14 $(CXXFLAGS)
++CXX_LD_FLAGS := -lstdc++ $(LDFLAGS)
+ 
+ SRCS := $(wildcard src/*.cpp)
+ OBJECTS := $(patsubst %.cpp,$(BUILD_DIR)/%.o,$(SRCS))

recipes-devtools/hc-gen/hc-gen_3.0.bb

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+SUMMARY = "Meta-build system that generates build files for Ninja"
+LICENSE = "GPL-2.0-or-later | BSD-3-Clause"
+LIC_FILES_CHKSUM = "file://../../LICENSE;md5=e97719e0c951ddc23a7d37facffdf32a"
+
+BBCLASSEXTEND = "native nativesdk"
+
+DEPENDS += "bison-native flex-native"
+
+SRC_URI = "git://gitee.com/openharmony/drivers_framework.git;protocol=https;branch=OpenHarmony-3.0-LTS"
+SRCREV = "9a26a7542281dcab90e7c0e9aa33c921171117cb"
+
+SRC_URI:append = " file://cxx-and-flags.patch"
+
+S = "${WORKDIR}/git/tools/hc-gen"
+
+EXTRA_OEMAKE += "CC='${CC}' CFLAGS='${CFLAGS}' LDFLAGS='${LDFLAGS}'"
+
+# Include debug symbols in build (bitbake will strip place them in -dbg package)
+EXTRA_OEMAKE += "BUILD_TYPE=debug"
+
+do_install () {
+    install -D -t ${D}${bindir} -m 755 ${S}/build/hc-gen
+}