package/libsigc2: new package

This is the version of libsigc needed for gtkmm3.

Signed-off-by: Daniel Lang <d.lang@abatec.at>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

DEVELOPERS

@@ -642,6 +642,7 @@ F:	package/dacapo/
 N:	Daniel Lang <d.lang@abatec.at>
 F:	package/dbus-cxx/
 F:	package/libsigc/
+F:	package/libsigc2/
 F:	package/paho-mqtt-cpp/
 
 N:	Damien Lanson <damien@kal-host.com>

package/Config.in

@@ -2095,6 +2095,7 @@ menu "Other"
 	source "package/libseccomp/Config.in"
 	source "package/libshdata/Config.in"
 	source "package/libsigc/Config.in"
+	source "package/libsigc2/Config.in"
 	source "package/libsigsegv/Config.in"
 	source "package/libsolv/Config.in"
 	source "package/libspatialindex/Config.in"

package/libsigc/Config.in

@@ -1,5 +1,5 @@
 config BR2_PACKAGE_LIBSIGC
-	bool "libsigc++"
+	bool "libsigc++ (latest)"
 	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # C++17
 	depends on BR2_INSTALL_LIBSTDCPP
 	help

package/libsigc2/Config.in

@@ -0,0 +1,17 @@
+config BR2_PACKAGE_LIBSIGC2
+	bool "libsigc++ (2.x.x)"
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_INSTALL_LIBSTDCPP
+	help
+	  libsigc++ implements a typesafe callback system for standard
+	  C++. It allows you to define signals and to connect those
+	  signals to any callback function, either global or a member
+	  function, regardless of whether it is static or virtual.
+
+	  This is the last version before the API and ABI change
+	  introduced in 3.0.0 which requires C++17.
+
+	  https://libsigcplusplus.github.io/libsigcplusplus/
+
+comment "libsigc++ (2.x.x) needs a toolchain w/ C++, gcc >= 4.9"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9

package/libsigc2/libsigc2.hash

@@ -0,0 +1,5 @@
+# From https://download.gnome.org/sources/libsigc++/2.12/libsigc++-2.12.0.sha256sum
+sha256  1c466d2e64b34f9b118976eb21b138c37ed124d0f61497df2a90ce6c3d9fa3b5  libsigc++-2.12.0.tar.xz
+
+# Locally calculated
+sha256  5bbcbb737e60fe9deba08ecbd00920cfcc3403ba2e534c64fdeea49d6bb87509  COPYING

package/libsigc2/libsigc2.mk

@@ -0,0 +1,19 @@
+################################################################################
+#
+# libsigc2
+#
+################################################################################
+
+LIBSIGC2_VERSION_MAJOR = 2.12
+LIBSIGC2_VERSION = $(LIBSIGC2_VERSION_MAJOR).0
+LIBSIGC2_SOURCE = libsigc++-$(LIBSIGC2_VERSION).tar.xz
+LIBSIGC2_SITE = https://download.gnome.org/sources/libsigc++/$(LIBSIGC2_VERSION_MAJOR)
+LIBSIGC2_INSTALL_STAGING = YES
+LIBSIGC2_LICENSE = LGPL-2.1+
+LIBSIGC2_LICENSE_FILES = COPYING
+LIBSIGC2_CONF_OPTS = \
+	-Dbuild-examples=false \
+	-Dbuild-tests=false \
+	-Dvalidation=false
+
+$(eval $(meson-package))