package/libsigc: needs C++17

C++17 is mandatory since bump to version 3.0.7 in commit
d676c0e494ff75f00402f8bbd4afa90d27cea89b and
https://github.com/libsigcplusplus/libsigcplusplus/commit/617276cf47db463159263c359f7db09fcb6aaa9e

Fixes:
 - http://autobuild.buildroot.org/results/6753fc9dce030a7d8be9afd202a5e27bc09a0041

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/atkmm/Config.in

@@ -1,7 +1,7 @@
 config BR2_PACKAGE_ATKMM
 	bool "atkmm"
 	depends on BR2_INSTALL_LIBSTDCPP # glibmm
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # libsigc
 	depends on BR2_TOOLCHAIN_HAS_THREADS # atk/glibmm -> libglib2
 	depends on BR2_USE_MMU # atk/glibmm -> libglib2
 	depends on BR2_USE_WCHAR # atk/glibmm -> libglib2
@@ -14,7 +14,7 @@ config BR2_PACKAGE_ATKMM
 
 	  http://www.gtkmm.org/
 
-comment "atkmm needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+comment "atkmm needs a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS

package/cairomm/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_CAIROMM
 	bool "cairomm"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # libsigc
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
 	depends on BR2_USE_WCHAR # libglib2
 	depends on BR2_USE_MMU # libglib2
@@ -13,7 +13,7 @@ config BR2_PACKAGE_CAIROMM
 
 	  http://www.gtkmm.org/
 
-comment "cairomm needs a toolchain w/ C++, wchar, threads, gcc >= 4.8"
+comment "cairomm needs a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP

package/glibmm/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_GLIBMM
 	bool "glibmm"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # regex_replace
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # libsigc
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR # libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
@@ -12,7 +12,7 @@ config BR2_PACKAGE_GLIBMM
 
 	  http://www.gtkmm.org/
 
-comment "glibmm needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+comment "glibmm needs a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS

package/gstreamer1/gstreamer1-mm/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_GSTREAMER1_MM
 	bool "gstreamer1-mm"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # glibmm
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # glibmm -> libsigc
 	depends on BR2_INSTALL_LIBSTDCPP # glibmm
 	depends on BR2_USE_WCHAR # glibmm -> libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
@@ -23,7 +23,7 @@ config BR2_PACKAGE_GSTREAMER1_MM
 
 	  https://gstreamer.freedesktop.org/bindings/cplusplus.html
 
-comment "gstreamer1-mm needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+comment "gstreamer1-mm needs a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS

package/gtkmm3/Config.in

@@ -1,7 +1,7 @@
-comment "gtkmm3 needs libgtk3 and a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+comment "gtkmm3 needs libgtk3 and a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_INSTALL_LIBSTDCPP || !BR2_PACKAGE_LIBGTK3 \
 		|| !BR2_TOOLCHAIN_HAS_THREADS
 
@@ -14,7 +14,7 @@ config BR2_PACKAGE_GTKMM3
 	depends on !BR2_nios2
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # pangomm, libgtk3 -> pango -> harfbuzz
 	depends on BR2_INSTALL_LIBSTDCPP # glibmm, libpangomm -> glibmm/pango
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # libsigc
 	depends on BR2_TOOLCHAIN_HAS_THREADS # *mm/libgtk3 -> libglib2
 	depends on BR2_USE_MMU # *mm/libgtk3 -> libglib2
 	depends on BR2_USE_WCHAR # *mm/libgtk3 -> libglib2

package/libsigc/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_LIBSIGC
 	bool "libsigc++"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # C++17
 	depends on BR2_INSTALL_LIBSTDCPP
 	help
 	  libsigc++ implements a typesafe callback system for standard
@@ -10,5 +10,5 @@ config BR2_PACKAGE_LIBSIGC
 
 	  https://libsigcplusplus.github.io/libsigcplusplus/
 
-comment "libsigc++ needs a toolchain w/ C++, gcc >= 4.8"
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+comment "libsigc++ needs a toolchain w/ C++, gcc >= 7"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_7

package/libsigrok/Config.in

@@ -25,16 +25,16 @@ if BR2_PACKAGE_LIBSIGROK
 config BR2_PACKAGE_LIBSIGROKCXX
 	bool "build C++ bindings"
 	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # glibmm
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # glibmm -> libsigc
 	depends on BR2_HOST_GCC_AT_LEAST_4_9 # host-doxygen
 	select BR2_PACKAGE_GLIBMM
 	select BR2_PACKAGE_HOST_DOXYGEN
 	help
 	  Build libsigrok C++ bindings as well.
 
-comment "C++ bindings need a toolchain w/ C++, gcc >= 4.9, host gcc >= 4.9"
+comment "C++ bindings need a toolchain w/ C++, gcc >= 7, host gcc >= 4.9"
 	depends on !BR2_INSTALL_LIBSTDCPP || \
-		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_7 || \
 		!BR2_HOST_GCC_AT_LEAST_4_9
 
 endif

package/libxmlpp/Config.in

@@ -1,6 +1,6 @@
 config BR2_PACKAGE_LIBXMLPP
 	bool "libxml++"
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # glibmm -> libsigc
 	depends on BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_WCHAR # glibmm -> libglib2
 	depends on BR2_TOOLCHAIN_HAS_THREADS # glibmm -> libglib2
@@ -12,7 +12,7 @@ config BR2_PACKAGE_LIBXMLPP
 
 	  https://libxmlplusplus.github.io/libxmlplusplus/
 
-comment "libxml++ needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+comment "libxml++ needs a toolchain w/ C++, wchar, threads, gcc >= 7"
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		||!BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP
 	depends on BR2_USE_MMU

package/pangomm/Config.in

@@ -2,7 +2,7 @@ config BR2_PACKAGE_PANGOMM
 	bool "pangomm"
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # pango -> harfbuzz
 	depends on BR2_INSTALL_LIBSTDCPP # glibmm/pango
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7 # libsigc
 	depends on BR2_TOOLCHAIN_HAS_THREADS # *mm/pango -> libglib2
 	depends on BR2_USE_MMU # *mm/pango -> libglib2
 	depends on BR2_USE_WCHAR # *mm/pango -> libglib2
@@ -15,8 +15,8 @@ config BR2_PACKAGE_PANGOMM
 
 	  http://www.gtkmm.org/
 
-comment "pangomm needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+comment "pangomm needs a toolchain w/ C++, wchar, threads, gcc >= 7"
 	depends on BR2_USE_MMU
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS

package/pulseview/Config.in

@@ -10,7 +10,7 @@ config BR2_PACKAGE_PULSEVIEW
 	# libsigrok->libzip
 	depends on !BR2_STATIC_LIBS
 	# libsigrok
-	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_7
 	depends on BR2_HOST_GCC_AT_LEAST_4_9
 	depends on BR2_ENABLE_LOCALE
 	select BR2_PACKAGE_LIBSIGROK
@@ -30,11 +30,11 @@ config BR2_PACKAGE_PULSEVIEW
 
 	  http://sigrok.org/wiki/PulseView
 
-comment "pulseview needs a toolchain w/ locale, wchar, threads, dynamic library, C++, gcc >= 4.9, host gcc >= 4.9"
+comment "pulseview needs a toolchain w/ locale, wchar, threads, dynamic library, C++, gcc >= 7, host gcc >= 4.9"
 	depends on BR2_USE_MMU
 	depends on BR2_PACKAGE_QT5
 	depends on BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
-	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7 || !BR2_USE_WCHAR \
 		|| !BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP \
 		|| BR2_STATIC_LIBS || !BR2_ENABLE_LOCALE || \
 		!BR2_HOST_GCC_AT_LEAST_4_9