initial buildroot for linux 5.15

package/zeromq/Config.in

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+comment "zeromq needs a toolchain w/ C++, threads"
+	depends on !(BR2_INSTALL_LIBSTDCPP && BR2_TOOLCHAIN_HAS_THREADS)
+
+config BR2_PACKAGE_ZEROMQ
+	bool "zeromq"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	select BR2_PACKAGE_UTIL_LINUX
+	select BR2_PACKAGE_UTIL_LINUX_LIBUUID
+	help
+	  ØMQ (ZeroMQ, 0MQ, zmq) looks like an embeddable networking
+	  library but acts like a concurrency framework. It gives you
+	  sockets that carry whole messages across various transports
+	  like in-process, inter- process, TCP, and multicast. You can
+	  connect sockets N-to-N with patterns like fanout, pub-sub,
+	  task distribution, and request-reply. It's fast enough to
+	  be the fabric for clustered products. Its asynchronous I/O
+	  model gives you scalable multicore applications, built as
+	  asynchronous message-processing tasks. It has a score of
+	  language APIs and runs on most operating systems.
+
+	  ØMQ is from iMatix and is LGPL open source.
+
+	  http://www.zeromq.org/
+
+if BR2_PACKAGE_ZEROMQ
+
+comment "norm support needs a toolchain w/ dynamic library"
+	depends on BR2_STATIC_LIBS
+
+config BR2_PACKAGE_ZEROMQ_NORM
+	bool "NORM support"
+	depends on !BR2_STATIC_LIBS
+	select BR2_PACKAGE_NORM
+	help
+	  Add support for NACK-Oriented Reliable Multicast (RFC 5740)
+	  protocol.
+
+comment "PGM/EPGM support needs a toolchain w/ wchar"
+	depends on BR2_TOOLCHAIN_HAS_SYNC_2
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+	depends on !BR2_USE_WCHAR
+
+config BR2_PACKAGE_ZEROMQ_PGM
+	bool "PGM/EPGM support"
+	depends on BR2_TOOLCHAIN_HAS_SYNC_2
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+	depends on BR2_USE_WCHAR # openpgm
+	select BR2_PACKAGE_OPENPGM
+	help
+	  Add support for Pragmatic General Multicast protocol (RFC
+	  3208) implemented either over raw IP packets or UDP
+	  datagrams (encapsulated PGM).
+
+config BR2_PACKAGE_ZEROMQ_DRAFTS
+	bool "Draft APIs support"
+	help
+	  Enable unstable draft ZeroMQ APIs
+
+	  https://pyzmq.readthedocs.io/en/latest/draft.html
+
+config BR2_PACKAGE_ZEROMQ_WEBSOCKET
+	bool "WebSocket support"
+	help
+	  Enable WebSocket transport
+
+endif

package/zeromq/zeromq.hash

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+# From https://github.com/zeromq/libzmq/releases
+md5  c897d4005a3f0b8276b00b7921412379  zeromq-4.3.4.tar.gz
+sha1  47277a64749049123d1401600e8cfbab10a3ae28  zeromq-4.3.4.tar.gz
+# Locally computed
+sha256  c593001a89f5a85dd2ddf564805deb860e02471171b3f204944857336295c3e5  zeromq-4.3.4.tar.gz
+sha256  4fd86507c9b486764343065a9e035222869a27b5789efeb4fd93edc85412d7a3  COPYING
+sha256  83f32abe61ee58ffb1b007412c08415168c052501dbf56d7a47aaaac52b03ef6  COPYING.LESSER

package/zeromq/zeromq.mk

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+################################################################################
+#
+# zeromq
+#
+################################################################################
+
+ZEROMQ_VERSION = 4.3.4
+ZEROMQ_SITE = https://github.com/zeromq/libzmq/releases/download/v$(ZEROMQ_VERSION)
+ZEROMQ_INSTALL_STAGING = YES
+ZEROMQ_DEPENDENCIES = util-linux
+ZEROMQ_CONF_OPTS = --disable-Werror --without-documentation
+ZEROMQ_LICENSE = LGPL-3.0+ with exceptions
+ZEROMQ_LICENSE_FILES = COPYING COPYING.LESSER
+ZEROMQ_CPE_ID_VENDOR = zeromq
+ZEROMQ_CPE_ID_PRODUCT = libzmq
+
+# Assume these flags are always available. It is true, at least for
+# SOCK_CLOEXEC, since linux v2.6.27.
+# Note: the flag TCP_KEEPALIVE is NOT available so we do not include it.
+ZEROMQ_CONF_ENV = libzmq_cv_sock_cloexec=yes \
+	libzmq_cv_so_keepalive=yes \
+	libzmq_cv_tcp_keepcnt=yes \
+	libzmq_cv_tcp_keepidle=yes \
+	libzmq_cv_tcp_keepintvl=yes
+
+# Internal error, aborting at dwarf2cfi.c:2752 in connect_traces
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58864
+ifeq ($(BR2_m68k_cf),y)
+ZEROMQ_CONF_OPTS += CXXFLAGS="$(TARGET_CXXFLAGS) -fno-defer-pop"
+endif
+
+# Only tools/curve_keygen.c needs this, but it doesn't hurt to pass it
+# for the rest of the build as well (which automatically includes stdc++).
+ifeq ($(BR2_STATIC_LIBS),y)
+ZEROMQ_CONF_OPTS += LIBS=-lstdc++
+endif
+
+ifeq ($(BR2_PACKAGE_ZEROMQ_NORM),y)
+ZEROMQ_CONF_OPTS += --with-norm
+ZEROMQ_DEPENDENCIES += norm
+else
+ZEROMQ_CONF_OPTS += --without-norm
+endif
+
+ifeq ($(BR2_PACKAGE_ZEROMQ_PGM),y)
+ZEROMQ_DEPENDENCIES += host-pkgconf openpgm
+ZEROMQ_CONF_OPTS += --with-pgm
+else
+ZEROMQ_CONF_OPTS += --without-pgm
+endif
+
+ifeq ($(BR2_PACKAGE_ZEROMQ_DRAFTS),y)
+ZEROMQ_CONF_OPTS += --enable-drafts
+else
+ZEROMQ_CONF_OPTS += --disable-drafts
+endif
+
+ifeq ($(BR2_PACKAGE_ZEROMQ_WEBSOCKET),y)
+ZEROMQ_CONF_OPTS += --enable-ws
+else
+ZEROMQ_CONF_OPTS += --disable-ws
+endif
+
+ifeq ($(BR2_PACKAGE_GNUTLS),y)
+ZEROMQ_DEPENDENCIES += host-pkgconf gnutls
+ZEROMQ_CONF_OPTS += --with-tls
+else
+ZEROMQ_CONF_OPTS += --without-tls
+endif
+
+ifeq ($(BR2_PACKAGE_LIBBSD),y)
+ZEROMQ_DEPENDENCIES += host-pkgconf libbsd
+ZEROMQ_CONF_OPTS += --enable-libbsd
+else
+ZEROMQ_CONF_OPTS += --disable-libbsd
+endif
+
+ifeq ($(BR2_PACKAGE_LIBNSS),y)
+ZEROMQ_DEPENDENCIES += host-pkgconf libnss
+ZEROMQ_CONF_OPTS += --with-nss
+else
+ZEROMQ_CONF_OPTS += --without-nss
+endif
+
+# ZeroMQ uses libsodium if it's available.
+ifeq ($(BR2_PACKAGE_LIBSODIUM),y)
+ZEROMQ_DEPENDENCIES += libsodium
+ZEROMQ_CONF_OPTS += --with-libsodium="$(STAGING_DIR)/usr"
+else
+ZEROMQ_CONF_OPTS += --without-libsodium
+endif
+
+ifeq ($(BR2_PACKAGE_LIBUNWIND),y)
+ZEROMQ_DEPENDENCIES += libunwind
+ZEROMQ_CONF_OPTS += --enable-libunwind
+else
+ZEROMQ_CONF_OPTS += --disable-libunwind
+endif
+
+$(eval $(autotools-package))