initial buildroot for linux 5.15

package/flare-engine/Config.in

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+config BR2_PACKAGE_FLARE_ENGINE
+	bool "flare-engine"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_STATIC_LIBS # SDL2
+	select BR2_PACKAGE_LIBPNG # SDL2_IMAGE needs libpng support
+	select BR2_PACKAGE_SDL2
+	select BR2_PACKAGE_SDL2_IMAGE
+	select BR2_PACKAGE_SDL2_MIXER
+	select BR2_PACKAGE_SDL2_TTF
+	help
+	  Flare (Free Libre Action Roleplaying Engine) is a simple game
+	  engine built to handle a very specific kind of game:
+	  single-player 2D action RPGs.
+	  Flare is not a reimplementation of an existing game or engine.
+	  It is a tribute to and exploration of the action RPG genre.
+
+	  http://flarerpg.org
+
+comment "flare-engine needs a toolchain w/ C++, dynamic library"
+	depends on !BR2_INSTALL_LIBSTDCPP || BR2_STATIC_LIBS

package/flare-engine/flare-engine.hash

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+# Locally calculated
+sha256  035ffd936d9e120dc2eb792779a0b7ff64574d4a29a1124946deaf7946d1059d  flare-engine-1.11.tar.gz
+sha256  8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/flare-engine/flare-engine.mk

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+################################################################################
+#
+# flare-engine
+#
+################################################################################
+
+FLARE_ENGINE_VERSION = 1.11
+FLARE_ENGINE_SITE = $(call github,flareteam,flare-engine,v$(FLARE_ENGINE_VERSION))
+FLARE_ENGINE_LICENSE = GPL-3.0+
+FLARE_ENGINE_LICENSE_FILES = COPYING
+
+FLARE_ENGINE_DEPENDENCIES += sdl2 sdl2_image sdl2_mixer sdl2_ttf
+
+# Don't use /usr/games and /usr/share/games
+FLARE_ENGINE_CONF_OPTS += -DBINDIR=bin -DDATADIR=share/flare
+
+# CMAKE_BUILD_TYPE is only used to set optimization and debug flags, all of
+# which we want Buildroot to steer explicitly. Explicitly set a fake build type
+# to get this control.
+FLARE_ENGINE_CONF_OPTS += -DCMAKE_BUILD_TYPE=Buildroot
+
+ifeq ($(BR2_TOOLCHAIN_HAS_GCC_BUG_85180),y)
+FLARE_ENGINE_CONF_OPTS += -DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) -O0"
+endif
+
+$(eval $(cmake-package))