initial buildroot for linux 5.15

package/avrdude/Config.in

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+config BR2_PACKAGE_AVRDUDE
+	bool "avrdude"
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_USE_WCHAR # elfutils
+	depends on !BR2_STATIC_LIBS # elfutils
+	depends on BR2_TOOLCHAIN_USES_UCLIBC || BR2_TOOLCHAIN_USES_GLIBC # elfutils
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # libusb
+	select BR2_PACKAGE_ELFUTILS
+	select BR2_PACKAGE_LIBUSB
+	select BR2_PACKAGE_LIBUSB_COMPAT
+	select BR2_PACKAGE_NCURSES
+	help
+	  avrdude is a programmer for Atmel AVR microcontrollers
+	  this package provides a version with new linuxspi driver
+
+	  https://github.com/kcuzner/avrdude
+
+if BR2_PACKAGE_AVRDUDE
+
+config BR2_PACKAGE_AVRDUDE_SPI
+	bool "SPI support"
+	default y # Backward compatibility
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
+
+comment "SPI support needs a toolchain w/ linux headers >= 4.6"
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
+
+endif
+
+comment "avrdude needs a uClibc or glibc toolchain w/ threads, wchar, dynamic library, gcc >= 4.9"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS || !BR2_USE_WCHAR \
+		|| BR2_STATIC_LIBS || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 \
+		|| !(BR2_TOOLCHAIN_USES_UCLIBC || BR2_TOOLCHAIN_USES_GLIBC)

package/avrdude/avrdude.hash

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+# Locally computed
+sha256  2a09913450c6457c3fe8d43d5141de579d4e57d67e593e7399a4cd3768cc60f9  avrdude-r1450-br2.tar.gz
+sha256  201babc7da198873304a77a30dbfc7ca449c9bba52df2dffa4cca0009dbdfcb2  avrdude/COPYING

package/avrdude/avrdude.mk

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+################################################################################
+#
+# avrdude
+#
+################################################################################
+
+AVRDUDE_VERSION = r1450
+AVRDUDE_SITE_METHOD = svn
+AVRDUDE_SITE = http://svn.savannah.nongnu.org/svn/avrdude/trunk
+AVRDUDE_LICENSE = GPL-2.0+
+AVRDUDE_LICENSE_FILES = avrdude/COPYING
+AVRDUDE_SUBDIR = avrdude
+# Sources coming from svn, without generated configure and Makefile.in
+# files.
+AVRDUDE_AUTORECONF = YES
+AVRDUDE_CONF_OPTS = --enable-linuxgpio
+AVRDUDE_DEPENDENCIES = elfutils libusb libusb-compat ncurses \
+	host-flex host-bison
+
+ifeq ($(BR2_PACKAGE_AVRDUDE_SPI),y)
+AVRDUDE_CONF_OPTS += --enable-linuxspi
+else
+AVRDUDE_CONF_OPTS += --disable-linuxspi
+endif
+
+ifeq ($(BR2_PACKAGE_LIBFTDI1),y)
+AVRDUDE_DEPENDENCIES += libftdi1
+else ifeq ($(BR2_PACKAGE_LIBFTDI),y)
+AVRDUDE_DEPENDENCIES += libftdi
+endif
+
+# if /etc/avrdude.conf exists, the installation process creates a
+# backup file, which we do not want in the context of Buildroot.
+define AVRDUDE_REMOVE_BACKUP_FILE
+	$(RM) -f $(TARGET_DIR)/etc/avrdude.conf.bak
+endef
+
+AVRDUDE_POST_INSTALL_TARGET_HOOKS += AVRDUDE_REMOVE_BACKUP_FILE
+
+$(eval $(autotools-package))