initial buildroot for linux 5.15

package/belle-sip/Config.in

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+config BR2_PACKAGE_BELLE_SIP
+	bool "belle-sip"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_STATIC_LIBS # dlfcn.h
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 # bctoolbox
+	depends on BR2_USE_WCHAR
+	select BR2_PACKAGE_BCTOOLBOX
+	# needs crypto support in bctoolbox
+	select BR2_PACKAGE_MBEDTLS
+	help
+	  Belle-sip is a modern library implementing SIP (RFC 3261)
+	  transport, transaction and dialog layers.
+
+	  http://www.linphone.org/technical-corner/belle-sip
+
+comment "belle-sip needs a toolchain w/ threads, C++, dynamic library, wchar"
+	depends on !BR2_INSTALL_LIBSTDCPP || BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR
+
+comment "belle-sip needs a toolchain not affected by GCC bug 64735"
+	depends on BR2_TOOLCHAIN_HAS_GCC_BUG_64735

package/belle-sip/belle-sip.hash

@@ -0,0 +1,3 @@
+# Locally calculated
+sha256  eabba615c97080572c1b9d3c76f8f9cf6a7432eedf37482672e5fa178a688f72  belle-sip-4.4.8.tar.gz
+sha256  1b3782ccad7b8614100cda30d3faf42fc39f2e97932908c543005053b654ca68  LICENSE.txt

package/belle-sip/belle-sip.mk

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+################################################################################
+#
+# belle-sip
+#
+################################################################################
+
+BELLE_SIP_VERSION = 4.4.8
+BELLE_SIP_SITE = \
+	https://gitlab.linphone.org/BC/public/belle-sip/-/archive/$(BELLE_SIP_VERSION)
+BELLE_SIP_LICENSE = GPL-3.0+
+BELLE_SIP_LICENSE_FILES = LICENSE.txt
+BELLE_SIP_CPE_ID_VENDOR = linphone
+BELLE_SIP_INSTALL_STAGING = YES
+BELLE_SIP_DEPENDENCIES = \
+	bctoolbox \
+	$(if $(BR2_PACKAGE_ZLIB),zlib)
+BELLE_SIP_CONF_OPTS = \
+	-DENABLE_STRICT=OFF \
+	-DENABLE_TESTS=OFF
+
+ifeq ($(BR2_PACKAGE_AVAHI_LIBDNSSD_COMPATIBILITY),y)
+BELLE_SIP_CONF_OPTS += -DENABLE_MDNS=ON
+BELLE_SIP_DEPENDENCIES += avahi
+else
+BELLE_SIP_CONF_OPTS += -DENABLE_MDNS=OFF
+endif
+
+ifeq ($(BR2_STATIC_LIBS),y)
+BELLE_SIP_CONF_OPTS += -DENABLE_SHARED=OFF -DENABLE_STATIC=ON
+else ifeq ($(BR2_SHARED_STATIC_LIBS),y)
+BELLE_SIP_CONF_OPTS += -DENABLE_SHARED=ON -DENABLE_STATIC=ON
+else ifeq ($(BR2_SHARED_LIBS),y)
+BELLE_SIP_CONF_OPTS += -DENABLE_SHARED=ON -DENABLE_STATIC=OFF
+endif
+
+BELLE_SIP_CFLAGS = $(TARGET_CFLAGS)
+
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_99140),y)
+BELLE_SIP_CFLAGS += -O0
+endif
+
+BELLE_SIP_CONF_OPTS += -DCMAKE_C_FLAGS="$(BELLE_SIP_CFLAGS)"
+
+$(eval $(cmake-package))