initial buildroot for linux 5.15

package/qhull/Config.in

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+config BR2_PACKAGE_QHULL
+	bool "qhull"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_4 # needs gcc >= 4.4
+	help
+	  Qhull computes the convex hull, Delaunay triangulation,
+	  Voronoi diagram, halfspace intersection about a point,
+	  furthest-site Delaunay triangulation, and furthest-site
+	  Voronoi diagram. The source code runs in 2-d, 3-d, 4-d, and
+	  higher dimensions. Qhull implements the Quickhull algorithm
+	  for computing the convex hull. It handles roundoff errors
+	  from floating point arithmetic. It computes volumes, surface
+	  areas, and approximations to the convex hull.
+
+	  http://www.qhull.org
+
+comment "qhull needs a toolchain w/ C++, gcc >= 4.4"
+	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_4

package/qhull/qhull.hash

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+# From http://www.qhull.org/download/qhull-2020-src-8.0.2-tgz.md5sum
+md5  ed767244864488d5e9a22dfa788663a9  qhull-2020-src-8.0.2-tgz
+# Locally computed
+sha256  b5c2d7eb833278881b952c8a52d20179eab87766b00b865000469a45c1838b7e  qhull-2020-src-8.0.2.tgz
+sha256  106d55c931fd6a84822e5345d900273d059f1c27310d02567ccb313c5d18c55d  COPYING.txt

package/qhull/qhull.mk

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+################################################################################
+#
+# qhull
+#
+################################################################################
+
+QHULL_VERSION = 8.0.2
+QHULL_SITE = http://www.qhull.org/download
+QHULL_SOURCE = qhull-2020-src-$(QHULL_VERSION).tgz
+QHULL_INSTALL_STAGING = YES
+QHULL_LICENSE = BSD-Style
+QHULL_LICENSE_FILES = COPYING.txt
+
+# Force Release mode to always build qhull_r instead of qhull_rd
+QHULL_CONF_OPTS = -DCMAKE_BUILD_TYPE=Release
+
+# BUILD_SHARED_LIBS is handled in pkg-cmake.mk as it is a generic cmake variable
+# although BUILD_STATIC_LIBS=ON is default, make it explicit,
+# cmake and static/shared libs is confusing enough already.
+ifeq ($(BR2_STATIC_LIBS),y)
+QHULL_CONF_OPTS += -DBUILD_STATIC_LIBS=ON
+else ifeq ($(BR2_SHARED_STATIC_LIBS),y)
+QHULL_CONF_OPTS += -DBUILD_STATIC_LIBS=ON
+else ifeq ($(BR2_SHARED_LIBS),y)
+QHULL_CONF_OPTS += -DBUILD_STATIC_LIBS=OFF
+endif
+
+$(eval $(cmake-package))