try to build poco inside openhd

external/buildroot/package/openhd/Config.in

@@ -1,11 +1,9 @@
 config BR2_PACKAGE_OPENHD
     bool "openhd"
     select BR2_PACKAGE_LIBPCAP
-    select BR2_PACKAGE_POCO
     select BR2_PACKAGE_LIBSODIUM
     select BR2_PACKAGE_GSTREAMER1
     select BR2_PACKAGE_GST1_PLUGINS_BASE
     select BR2_PACKAGE_GST1_PLUGINS_BASE_PLUGIN_APP
-    depends on BR2_PACKAGE_POCO_VERSION_1_13_2
     help
-      OpenHD package
+      OpenHD is an open-source platform for low-latency, high-definition digital video transmission.

external/buildroot/package/openhd/openhd.mk

@@ -22,17 +22,65 @@ OPENHD_SUBDIR = OpenHD
 OPENHD_INSTALL_STAGING = YES
 OPENHD_INSTALL_TARGET = YES
 
-# List of dependencies that must be built before OpenHD
-OPENHD_DEPENDENCIES = poco libsodium gstreamer1 gst1-plugins-base libpcap host-pkgconf
+# Dependencies that are needed by OpenHD
+OPENHD_DEPENDENCIES = libsodium gstreamer1 gst1-plugins-base libpcap host-pkgconf
 
-# Additional configuration options for the CMake build
+# Poco version to build from source
+POCO_VERSION = 1.13.2
+POCO_SITE = https://github.com/pocoproject/poco/archive/refs/tags/poco-$(POCO_VERSION)-release.tar.gz
+
+# Define the steps for downloading and extracting poco
+define OPENHD_EXTRACT_POCO
+	$(call step_start,extract)
+	$(call host-wget,$(POCO_SITE),$(BUILD_DIR))
+	tar -xvf $(BUILD_DIR)/poco-$(POCO_VERSION)-release.tar.gz -C $(BUILD_DIR)
+	$(call step_end,extract)
+endef
+
+# Define the steps to configure poco with CMake
+define OPENHD_CONFIGURE_POCO
+	$(call step_start,configure)
+	cd $(BUILD_DIR)/poco-poco-$(POCO_VERSION)-release && \
+	cmake \
+		-DCMAKE_BUILD_TYPE=Release \
+		-DCMAKE_INSTALL_PREFIX=$(STAGING_DIR)/usr \
+		-DCMAKE_SYSROOT=$(STAGING_DIR) \
+		-DPOCO_UNBUNDLED=ON \
+		-DENABLE_TESTS=OFF
+	$(call step_end,configure)
+endef
+
+# Define the steps to build poco
+define OPENHD_BUILD_POCO
+	$(call step_start,build)
+	cd $(BUILD_DIR)/poco-poco-$(POCO_VERSION)-release && \
+	$(MAKE)
+	$(call step_end,build)
+endef
+
+# Define the steps to install poco
+define OPENHD_INSTALL_POCO
+	$(call step_start,install)
+	cd $(BUILD_DIR)/poco-poco-$(POCO_VERSION)-release && \
+	$(MAKE) install
+	$(call step_end,install)
+endef
+
+# Integrate poco's steps into the OpenHD package build process
+OPENHD_POST_EXTRACT_HOOKS += OPENHD_EXTRACT_POCO
+OPENHD_POST_CONFIGURE_HOOKS += OPENHD_CONFIGURE_POCO
+OPENHD_POST_BUILD_HOOKS += OPENHD_BUILD_POCO
+OPENHD_POST_INSTALL_TARGET_HOOKS += OPENHD_INSTALL_POCO
+
+# Additional configuration options for the CMake build of OpenHD
 OPENHD_CONF_OPTS = \
-    -DENABLE_USB_CAMERAS=OFF \
-    -DCMAKE_TOOLCHAIN_FILE=$(BR2_TOOLCHAIN_FILE) \
-    -DCMAKE_SYSROOT=$(STAGING_DIR) \
-    -DCMAKE_PREFIX_PATH=$(STAGING_DIR)/usr \
-    -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_INSTALL_PREFIX=/usr
+	-DENABLE_USB_CAMERAS=OFF \
+	-DCMAKE_TOOLCHAIN_FILE=$(BR2_TOOLCHAIN_FILE) \
+	-DCMAKE_SYSROOT=$(STAGING_DIR) \
+	-DCMAKE_PREFIX_PATH=$(STAGING_DIR)/usr \
+	-DCMAKE_BUILD_TYPE=Release \
+	-DCMAKE_INSTALL_PREFIX=/usr \
+	-DPOCO_DIR=$(STAGING_DIR)/usr/lib/cmake/Poco
 
 # Use Buildroot's CMake package infrastructure to handle the build
 $(eval $(cmake-package))