initial buildroot for linux 5.15

package/gensio/Config.in

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+config BR2_PACKAGE_GENSIO
+	bool "gensio"
+	depends on BR2_USE_MMU # fork()
+	help
+	  A library to abstract stream I/O like serial port, TCP,
+	  telnet, UDP, SSL, IPMI SOL, etc.
+
+	  https://github.com/cminyard/gensio

package/gensio/gensio.hash

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+# From https://sourceforge.net/projects/ser2net/files/ser2net/
+md5  45cd3a4d9058816e50351b0700a035ad  gensio-2.2.9.tar.gz
+sha1  4bb34517931f5be4dc5982f6e7a567cf6fdc41b8  gensio-2.2.9.tar.gz
+# Locally computed:
+sha256  3609f66e61c98cce181ec1b37508b727b636d7cfffdb6edd4c254d2f6097a000  gensio-2.2.9.tar.gz
+sha256  501f3108e6c03e5a0a5585ebaaa369171aead5319cd0a7a4dc1f66211c1f09f1  COPYING
+sha256  dcac7d447dd81ab96d28dce00a07a6486e623f7ded94e2a2a8e83312405cdf89  COPYING.LIB

package/gensio/gensio.mk

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+################################################################################
+#
+# gensio
+#
+################################################################################
+
+GENSIO_VERSION = 2.2.9
+GENSIO_SITE = http://downloads.sourceforge.net/project/ser2net/ser2net
+GENSIO_LICENSE = LGPL-2.1+ (library), GPL-2.0+ (tools)
+GENSIO_LICENSE_FILES = COPYING.LIB COPYING
+GENSIO_INSTALL_STAGING = YES
+GENSIO_CONF_OPTS = \
+	--without-openipmi \
+	--without-swig \
+	--without-python
+
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+GENSIO_DEPENDENCIES += host-pkgconf openssl
+GENSIO_CONF_OPTS += --with-openssl
+else
+GENSIO_CONF_OPTS += --without-openssl
+endif
+
+ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
+GENSIO_CONF_ENV += LIBS=-latomic
+endif
+
+ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
+GENSIO_CONF_OPTS += --with-pthreads
+else
+GENSIO_CONF_OPTS += --without-pthreads
+endif
+
+$(eval $(autotools-package))