initial buildroot for linux 5.15

package/timescaledb/Config.in

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+config BR2_PACKAGE_TIMESCALEDB
+	bool "timescaledb"
+	depends on BR2_PACKAGE_POSTGRESQL
+	help
+	  TimescaleDB is an open-source database designed
+	  to make SQL scalable for time-series data.
+	  It is engineered up from PostgreSQL and packaged
+	  as a PostgreSQL extension, providing automatic
+	  partitioning across time and space (partitioning key),
+	  as well as full SQL support.
+
+	  https://www.timescale.com/

package/timescaledb/timescaledb.hash

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+# Locally calculated
+sha256  b206a376251259eb745eee819e7a853b3fbab9dc8443303714484a0fef89a2a4  timescaledb-2.4.2.tar.gz
+sha256  0378e0948feefd85f579319c74d6e2b671194037f550c7176ef26649d94c895b  LICENSE

package/timescaledb/timescaledb.mk

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+################################################################################
+#
+# timescaledb
+#
+################################################################################
+
+TIMESCALEDB_VERSION = 2.4.2
+TIMESCALEDB_SITE = $(call github,timescale,timescaledb,$(TIMESCALEDB_VERSION))
+TIMESCALEDB_LICENSE = Apache-2.0
+TIMESCALEDB_LICENSE_FILES = LICENSE
+
+TIMESCALEDB_DEPENDENCIES = postgresql
+
+# The PG_CPPFLAGS, PG_CFLAGS, PG_LDFLAGS and PG_LIBS variables must be
+# non-empty, otherwise CMake will call the pg_config script, and our
+# pg_config replacement doesn't implement --cppflags --cflags
+# --ldflags and --libs.
+TIMESCALEDB_CONF_OPTS = \
+	-DTAP_CHECKS=OFF \
+	-DREGRESS_CHECKS=OFF \
+	-DWARNINGS_AS_ERRORS=OFF \
+	-DPG_PKGLIBDIR=lib/postgresql \
+	-DPG_SHAREDIR=share/postgresql \
+	-DPG_BINDIR=bin \
+	-DPG_CPPFLAGS="$(TARGET_CPPFLAGS) " \
+	-DPG_CFLAGS="$(TARGET_CFLAGS) " \
+	-DPG_LDFLAGS="$(TARGET_LDFLAGS) " \
+	-DPG_LIBS=" "
+
+# There's no dependency on the OpenSSL package, because USE_OPENSSL
+# only tells if postgresql was built with OpenSSL support or not.
+ifeq ($(BR2_PACKAGE_OPENSSL),y)
+TIMESCALEDB_CONF_OPTS += -DUSE_OPENSSL=1
+else
+TIMESCALEDB_CONF_OPTS += -DUSE_OPENSSL=0
+endif
+
+$(eval $(cmake-package))