initial buildroot for linux 5.15

package/quickjs/Config.in

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+config BR2_PACKAGE_QUICKJS
+	bool "quickjs"
+	depends on !BR2_nios2 # fenv.h lacks FE_{DOWN,UP}WARD on nios2
+	depends on !BR2_STATIC_LIBS
+	# No way to check for fenv support.
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C11/stdatomic.h
+	depends on BR2_HOST_GCC_AT_LEAST_4_9 # C11/stdatomic.h
+	depends on BR2_USE_MMU # fork()
+	help
+	  QuickJS is a small and embeddable Javascript engine.
+	  It supports the ES2020 specification including modules,
+	  asynchronous generators, proxies and BigInt.
+
+	  https://bellard.org/quickjs/
+
+comment "quickjs needs a glibc or musl toolchain w/ gcc >= 4.9, host gcc >= 4.9, dynamic library"
+	depends on !BR2_nios2
+	depends on BR2_USE_MMU
+	depends on BR2_STATIC_LIBS || BR2_TOOLCHAIN_USES_UCLIBC || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_HOST_GCC_AT_LEAST_4_9

package/quickjs/quickjs.hash

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+# Locally calculated
+sha256  a45bface4c3379538dea8533878d694e289330488ea7028b105f72572fe7fe1a  quickjs-2021-03-27.tar.xz
+sha256  f41baf09eef895d468d18c23055d74f711e4b8b2641cef279b5d71285c07bfe8  LICENSE

package/quickjs/quickjs.mk

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+################################################################################
+#
+# quickjs
+#
+################################################################################
+
+QUICKJS_VERSION = 2021-03-27
+QUICKJS_SOURCE = quickjs-$(QUICKJS_VERSION).tar.xz
+QUICKJS_SITE = https://bellard.org/quickjs
+QUICKJS_LICENSE = MIT
+QUICKJS_LICENSE_FILES = LICENSE
+QUICKJS_INSTALL_STAGING = YES
+
+ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
+QUICKJS_EXTRA_LIBS += -latomic
+endif
+
+define QUICKJS_BUILD_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) \
+		CROSS_PREFIX="$(TARGET_CROSS)" \
+		EXTRA_LIBS="$(QUICKJS_EXTRA_LIBS)" \
+		all
+endef
+
+define QUICKJS_INSTALL_STAGING_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) \
+		CROSS_PREFIX="$(TARGET_CROSS)" \
+		EXTRA_LIBS="$(QUICKJS_EXTRA_LIBS)" \
+		DESTDIR=$(STAGING_DIR) \
+		STRIP=/bin/true \
+		prefix=/usr \
+		install
+endef
+
+define QUICKJS_INSTALL_TARGET_CMDS
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) \
+		CROSS_PREFIX="$(TARGET_CROSS)" \
+		EXTRA_LIBS="$(QUICKJS_EXTRA_LIBS)" \
+		DESTDIR=$(TARGET_DIR) \
+		STRIP=/bin/true \
+		prefix=/usr \
+		install
+endef
+
+$(eval $(generic-package))