merge bitcoin#20471: use C++17 in depends

depends/packages/bdb.mk

@@ -12,7 +12,7 @@ $(package)_config_opts_mingw32=--enable-mingw
 $(package)_config_opts_linux=--with-pic
 $(package)_config_opts_android=--with-pic
 $(package)_cflags+=-Wno-error=implicit-function-declaration
-$(package)_cxxflags=-std=c++11
+$(package)_cxxflags=-std=c++17
 $(package)_cppflags_mingw32=-DUNICODE -D_UNICODE
 endef
 

depends/packages/boost.mk

@@ -23,7 +23,7 @@ else
 $(package)_toolset_$(host_os)=gcc
 endif
 $(package)_config_libraries=chrono,filesystem,system,thread,test
-$(package)_cxxflags=-std=c++11 -fvisibility=hidden
+$(package)_cxxflags=-std=c++17 -fvisibility=hidden
 $(package)_cxxflags_linux=-fPIC
 endef
 

depends/packages/qt.mk

@@ -25,9 +25,10 @@ $(package)_extra_sources += $($(package)_qttools_file_name)
 
 define $(package)_set_vars
 $(package)_config_opts_release = -release
+$(package)_config_opts_release += -silent
 $(package)_config_opts_debug = -debug
 $(package)_config_opts += -bindir $(build_prefix)/bin
-$(package)_config_opts += -c++std c++11
+$(package)_config_opts += -c++std c++1z
 $(package)_config_opts += -confirm-license
 $(package)_config_opts += -dbus-runtime
 $(package)_config_opts += -hostprefix $(build_prefix)
@@ -72,7 +73,6 @@ $(package)_config_opts += -qt-pcre
 $(package)_config_opts += -qt-harfbuzz
 $(package)_config_opts += -system-zlib
 $(package)_config_opts += -static
-$(package)_config_opts += -silent
 $(package)_config_opts += -v
 $(package)_config_opts += -no-feature-dial
 $(package)_config_opts += -no-feature-ftp

depends/packages/zeromq.mk

@@ -9,7 +9,7 @@ define $(package)_set_vars
   $(package)_config_opts += --without-libsodium --without-libgssapi_krb5 --without-pgm --without-norm --without-vmci
   $(package)_config_opts += --disable-libunwind --disable-radix-tree --without-gcov
   $(package)_config_opts_linux=--with-pic
-  $(package)_cxxflags=-std=c++11
+  $(package)_cxxflags=-std=c++17
 endef
 
 define $(package)_preprocess_cmds