initial buildroot for linux 5.15

package/armadillo/Config.in

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+comment "armadillo needs a toolchain w/ C++"
+	depends on BR2_PACKAGE_OPENBLAS_ARCH_SUPPORTS
+	depends on !BR2_INSTALL_LIBSTDCPP
+
+comment "armadillo needs a toolchain w/ fortran, C++"
+	depends on !BR2_PACKAGE_OPENBLAS_ARCH_SUPPORTS # otherwise, see comment above
+	depends on BR2_PACKAGE_LAPACK_ARCH_SUPPORTS
+	depends on !BR2_TOOLCHAIN_HAS_FORTRAN || !BR2_INSTALL_LIBSTDCPP
+
+config BR2_PACKAGE_ARMADILLO
+	bool "armadillo"
+	depends on BR2_PACKAGE_OPENBLAS_ARCH_SUPPORTS || \
+		(BR2_PACKAGE_LAPACK_ARCH_SUPPORTS && BR2_TOOLCHAIN_HAS_FORTRAN)
+	depends on BR2_INSTALL_LIBSTDCPP
+	help
+	  Armadillo: An Open Source C++ Linear Algebra Library for
+	  Fast Prototyping and Computationally Intensive Experiments.
+
+	  http://arma.sourceforge.net/
+
+if BR2_PACKAGE_ARMADILLO
+
+choice
+	prompt "BLAS implementation"
+
+config BR2_PACKAGE_ARMADILLO_OPENBLAS
+	bool "openblas"
+	depends on BR2_PACKAGE_OPENBLAS_ARCH_SUPPORTS
+	select BR2_PACKAGE_OPENBLAS
+
+config BR2_PACKAGE_ARMADILLO_LAPACK
+	bool "lapack"
+	depends on BR2_PACKAGE_LAPACK_ARCH_SUPPORTS && BR2_TOOLCHAIN_HAS_FORTRAN
+	select BR2_PACKAGE_LAPACK
+
+endchoice
+
+endif

package/armadillo/armadillo.hash

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+# Locally computed:
+sha256  d78658c9442addf7f718eb05881150ee3ec25604d06dd3af4942422b3ce26d05  armadillo-9.900.2.tar.xz
+# License files, locally calculated
+sha256  3ddf9be5c28fe27dad143a5dc76eea25222ad1dd68934a047064e56ed2fa40c5  LICENSE.txt

package/armadillo/armadillo.mk

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+################################################################################
+#
+# armadillo
+#
+################################################################################
+
+ARMADILLO_VERSION = 9.900.2
+ARMADILLO_SOURCE = armadillo-$(ARMADILLO_VERSION).tar.xz
+ARMADILLO_SITE = https://downloads.sourceforge.net/project/arma
+ARMADILLO_INSTALL_STAGING = YES
+ARMADILLO_LICENSE = Apache-2.0
+ARMADILLO_LICENSE_FILES = LICENSE.txt
+
+ARMADILLO_CONF_OPTS = -DDETECT_HDF5=false
+
+# blas support may be provided by lapack (libblas.a) or openblas (libopenblas.a)
+ARMADILLO_CONF_OPTS += -DBLAS_FOUND=ON
+ifeq ($(BR2_PACKAGE_ARMADILLO_OPENBLAS),y)
+ARMADILLO_CONF_OPTS += -DBLAS_LIBRARIES=-lopenblas
+ARMADILLO_DEPENDENCIES += openblas
+else
+# Since BR2_PACKAGE_LAPACK is selected in this case, the dependency on it is
+# added below.
+ARMADILLO_CONF_OPTS += -DBLAS_LIBRARIES=-lblas
+endif
+
+# lapack support is optional and can only be provided by lapack, not openblas
+ifeq ($(BR2_PACKAGE_LAPACK),y)
+ARMADILLO_CONF_OPTS += -DLAPACK_FOUND=ON
+ARMADILLO_DEPENDENCIES += lapack
+endif
+
+$(eval $(cmake-package))