initial buildroot for linux 5.15

package/glm/Config.in

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+config BR2_PACKAGE_GLM
+	bool "glm"
+	depends on BR2_INSTALL_LIBSTDCPP
+	help
+	  OpenGL Mathematics (GLM)
+
+	  http://glm.g-truc.net
+
+comment "glm needs a toolchain w/ C++"
+	depends on !BR2_INSTALL_LIBSTDCPP

package/glm/glm.hash

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+# Locally calculated
+sha256 5e33b6131cea6a904339734b015110d4342b7dc02d995164fdb86332d28a5aa4  glm-0.9.9.5.tar.gz
+sha256 337130631a714eeae017556cad101d5324c2961214120b6214741d3d43667086  manual.md

package/glm/glm.mk

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+################################################################################
+#
+# glm
+#
+################################################################################
+
+GLM_VERSION = 0.9.9.5
+GLM_SITE = $(call github,g-truc,glm,$(GLM_VERSION))
+GLM_LICENSE = MIT
+GLM_LICENSE_FILES = manual.md
+
+# GLM is a header-only library, it only makes sense
+# to have it installed into the staging directory.
+GLM_INSTALL_STAGING = YES
+GLM_INSTALL_TARGET = NO
+
+# Don't build libraries as GLM is header-only
+GLM_CONF_OPTS = \
+	-DGLM_TEST_ENABLE=OFF \
+	-DBUILD_SHARED_LIBS=OFF \
+	-DBUILD_STATIC_LIBS=OFF
+
+$(eval $(cmake-package))