initial buildroot for linux 5.15

package/synergy/Config.in

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+config BR2_PACKAGE_SYNERGY
+	bool "synergy"
+	depends on BR2_PACKAGE_XORG7
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR
+	depends on BR2_USE_MMU # fork()
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++14
+	select BR2_PACKAGE_XLIB_LIBX11
+	select BR2_PACKAGE_XLIB_LIBXTST
+	help
+	  Synergy lets you easily share a single mouse and
+	  keyboard between multiple computers with different
+	  operating systems, each with its own display,
+	  without special hardware.
+
+	  https://github.com/symless/synergy-core/
+
+comment "synergy needs a toolchain w/ C++, wchar, gcc >= 4.9"
+	depends on BR2_PACKAGE_XORG7
+	depends on BR2_USE_MMU
+	depends on !(BR2_INSTALL_LIBSTDCPP && BR2_USE_WCHAR && \
+		BR2_TOOLCHAIN_GCC_AT_LEAST_4_9)

package/synergy/synergy.hash

@@ -0,0 +1,3 @@
+# Locally computed:
+sha256 06d1cb1d43251b0b624212652e9c0ab2657d124ac4f7e7d0c7f3e448c953c2a8  synergy-2.0.12-beta.tar.gz
+sha256 4921009cd76e7d38a8e873c362b25dbaf032c320bbb36a40dec775ddbdcbe1d8  LICENSE

package/synergy/synergy.mk

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+################################################################################
+#
+# synergy
+#
+################################################################################
+
+SYNERGY_VERSION = 2.0.12-beta
+SYNERGY_SITE = $(call github,symless,synergy-core,v$(SYNERGY_VERSION))
+SYNERGY_LICENSE = GPL-2.0
+SYNERGY_LICENSE_FILES = LICENSE
+SYNERGY_CPE_ID_VENDOR = symless
+SYNERGY_DEPENDENCIES = xlib_libX11 xlib_libXtst
+
+# Avoid using buildroot commit hash inside cmake/Version.cmake
+# by setting SYNERGY_VERSION_STAGE != snapshot
+SYNERGY_CONF_ENV += SYNERGY_VERSION_STAGE="beta"
+
+ifeq ($(BR2_PACKAGE_XLIB_LIBXEXT),y)
+SYNERGY_DEPENDENCIES += xlib_libXext
+endif
+
+ifeq ($(BR2_PACKAGE_XLIB_LIBXI),y)
+SYNERGY_DEPENDENCIES += xlib_libXi
+endif
+
+ifeq ($(BR2_PACKAGE_XLIB_LIBXINERAMA),y)
+SYNERGY_DEPENDENCIES += xlib_libXinerama
+endif
+
+ifeq ($(BR2_PACKAGE_XLIB_LIBXRANDR),y)
+SYNERGY_DEPENDENCIES += xlib_libXrandr
+endif
+
+define SYNERGY_INSTALL_TARGET_CMDS
+	$(INSTALL) -D -m 0755 $(@D)/bin/synergyc $(TARGET_DIR)/usr/bin/synergyc
+	$(INSTALL) -D -m 0755 $(@D)/bin/synergys $(TARGET_DIR)/usr/bin/synergys
+endef
+
+$(eval $(cmake-package))