Require c++17 standardfeat/use-c++17-standard

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

55 files changed, 55 insertions, 55 deletions

diff --git a/mkspecs/aix-g++-64/qmake.conf b/mkspecs/aix-g++-64/qmake.conf
index 2f4594dd5..6e417654d 100644
--- a/mkspecs/aix-g++-64/qmake.conf
+++ b/mkspecs/aix-g++-64/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_THREAD	= -D_THREAD_SAFE
 
 QMAKE_CXX		= g++
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/aix-g++/qmake.conf b/mkspecs/aix-g++/qmake.conf
index 87ef9098b..d407038c1 100644
--- a/mkspecs/aix-g++/qmake.conf
+++ b/mkspecs/aix-g++/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_THREAD	= -D_THREAD_SAFE
 
 QMAKE_CXX		= g++
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/aix-xlc-64/qmake.conf b/mkspecs/aix-xlc-64/qmake.conf
index 89bef22c6..27eb8cb65 100644
--- a/mkspecs/aix-xlc-64/qmake.conf
+++ b/mkspecs/aix-xlc-64/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_THREAD	= -qthreaded
 
 QMAKE_CXX		= xlC
 QMAKE_CXX_THREAD	= xlC_r
-QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/aix-xlc/qmake.conf b/mkspecs/aix-xlc/qmake.conf
index a026de205..6d4f0e03f 100644
--- a/mkspecs/aix-xlc/qmake.conf
+++ b/mkspecs/aix-xlc/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_THREAD	= -qthreaded
 
 QMAKE_CXX		= xlC
 QMAKE_CXX_THREAD	= xlC_r
-QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/bsdi-g++/qmake.conf b/mkspecs/bsdi-g++/qmake.conf
index d4909e7dd..37ee2f12c 100644
--- a/mkspecs/bsdi-g++/qmake.conf
+++ b/mkspecs/bsdi-g++/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/cygwin-g++/qmake.conf b/mkspecs/cygwin-g++/qmake.conf
index bb8ba5dd0..3a7fa7f9f 100644
--- a/mkspecs/cygwin-g++/qmake.conf
+++ b/mkspecs/cygwin-g++/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/darwin-g++/qmake.conf b/mkspecs/darwin-g++/qmake.conf
index 350f1fdfe..695a73c0b 100644
--- a/mkspecs/darwin-g++/qmake.conf
+++ b/mkspecs/darwin-g++/qmake.conf
@@ -29,7 +29,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= c++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/dilos-g++/qmake.conf b/mkspecs/dilos-g++/qmake.conf
index 8574f9bfb..f4d347dba 100644
--- a/mkspecs/dilos-g++/qmake.conf
+++ b/mkspecs/dilos-g++/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/freebsd-clang/qmake.conf b/mkspecs/freebsd-clang/qmake.conf
index 639052d9a..4a112e4b1 100644
--- a/mkspecs/freebsd-clang/qmake.conf
+++ b/mkspecs/freebsd-clang/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread -D_THREAD_SAFE
 
 QMAKE_CXX		= clang++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/freebsd-g++/qmake.conf b/mkspecs/freebsd-g++/qmake.conf
index 0dee3070c..0d85dbc89 100644
--- a/mkspecs/freebsd-g++/qmake.conf
+++ b/mkspecs/freebsd-g++/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread -D_THREAD_SAFE
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/freebsd-g++34/qmake.conf b/mkspecs/freebsd-g++34/qmake.conf
index 758994fd7..52be529a0 100644
--- a/mkspecs/freebsd-g++34/qmake.conf
+++ b/mkspecs/freebsd-g++34/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread -D_THREAD_SAFE
 
 QMAKE_CXX		= g++34
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/freebsd-icc/qmake.conf b/mkspecs/freebsd-icc/qmake.conf
index 4e108492a..e7348faa2 100644
--- a/mkspecs/freebsd-icc/qmake.conf
+++ b/mkspecs/freebsd-icc/qmake.conf
@@ -41,7 +41,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_THREAD_SAFE
 
 QMAKE_CXX		= icpc
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpux-acc-64/qmake.conf b/mkspecs/hpux-acc-64/qmake.conf
index 4a47ed6e7..b39d66ffa 100644
--- a/mkspecs/hpux-acc-64/qmake.conf
+++ b/mkspecs/hpux-acc-64/qmake.conf
@@ -65,7 +65,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= aCC
-QMAKE_CXXFLAGS		= -Aa +DA2.0W -w -D__STRICT_ANSI__ -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= -Aa +DA2.0W -w -D__STRICT_ANSI__ -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= +M
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpux-acc-o64/qmake.conf b/mkspecs/hpux-acc-o64/qmake.conf
index 906092ac6..d95ee620f 100644
--- a/mkspecs/hpux-acc-o64/qmake.conf
+++ b/mkspecs/hpux-acc-o64/qmake.conf
@@ -65,7 +65,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= aCC
-QMAKE_CXXFLAGS		= +DA2.0 -w -D__STRICT_ANSI__ -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= +DA2.0 -w -D__STRICT_ANSI__ -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/hpux-acc/qmake.conf b/mkspecs/hpux-acc/qmake.conf
index d9ca7fe9c..25604dae9 100644
--- a/mkspecs/hpux-acc/qmake.conf
+++ b/mkspecs/hpux-acc/qmake.conf
@@ -44,7 +44,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= aCC
-QMAKE_CXXFLAGS		= +DAportable -w -D__STRICT_ANSI__ -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= +DAportable -w -D__STRICT_ANSI__ -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= +M
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpux-cc/qmake.conf b/mkspecs/hpux-cc/qmake.conf
index 0f217e459..9e5c78383 100644
--- a/mkspecs/hpux-cc/qmake.conf
+++ b/mkspecs/hpux-cc/qmake.conf
@@ -44,7 +44,7 @@ QMAKE_CFLAGS_SHLIB	= +Z
 QMAKE_CFLAGS_YACC	=
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= +DA1.1e -w +a1 -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= +DA1.1e -w +a1 -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/hpux-g++-64/qmake.conf b/mkspecs/hpux-g++-64/qmake.conf
index 519ad3bb4..971501a8c 100644
--- a/mkspecs/hpux-g++-64/qmake.conf
+++ b/mkspecs/hpux-g++-64/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpux-g++/qmake.conf b/mkspecs/hpux-g++/qmake.conf
index bd08469f8..6b1316259 100644
--- a/mkspecs/hpux-g++/qmake.conf
+++ b/mkspecs/hpux-g++/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpuxi-acc-32/qmake.conf b/mkspecs/hpuxi-acc-32/qmake.conf
index dcb213008..9ab50cd88 100644
--- a/mkspecs/hpuxi-acc-32/qmake.conf
+++ b/mkspecs/hpuxi-acc-32/qmake.conf
@@ -65,7 +65,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= aCC
-QMAKE_CXXFLAGS		= +DD32 +DSitanium -w -D__STRICT_ANSI__ -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= +DD32 +DSitanium -w -D__STRICT_ANSI__ -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= +M
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hpuxi-acc-64/qmake.conf b/mkspecs/hpuxi-acc-64/qmake.conf
index c5e913c15..92eda14e5 100644
--- a/mkspecs/hpuxi-acc-64/qmake.conf
+++ b/mkspecs/hpuxi-acc-64/qmake.conf
@@ -65,7 +65,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_POSIX_C_SOURCE=199506L -D_HPUX_SOURCE
 
 QMAKE_CXX		= aCC
-QMAKE_CXXFLAGS		= +DD64 +DSitanium -w -D__STRICT_ANSI__ -D_HPUX_SOURCE
+QMAKE_CXXFLAGS		= +DD64 +DSitanium -w -D__STRICT_ANSI__ -D_HPUX_SOURCE -std=c++17
 QMAKE_CXXFLAGS_DEPS	= +M
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/hurd-g++/qmake.conf b/mkspecs/hurd-g++/qmake.conf
index ed7fe2c15..e83a0922c 100644
--- a/mkspecs/hurd-g++/qmake.conf
+++ b/mkspecs/hurd-g++/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/irix-cc-64/qmake.conf b/mkspecs/irix-cc-64/qmake.conf
index 4f167c254..6141313de 100644
--- a/mkspecs/irix-cc-64/qmake.conf
+++ b/mkspecs/irix-cc-64/qmake.conf
@@ -55,7 +55,7 @@ QMAKE_CFLAGS_YACC	= -woff 1110,1174,3262
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= -64 -signed -woff 1021,1209,1233,1314,1355,1375,1424,1506,1681,1682,3496
+QMAKE_CXXFLAGS		= -64 -signed -woff 1021,1209,1233,1314,1355,1375,1424,1506,1681,1682,3496 -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/irix-cc-o32/qmake.conf b/mkspecs/irix-cc-o32/qmake.conf
index ffd8124a4..2c6c2a5df 100644
--- a/mkspecs/irix-cc-o32/qmake.conf
+++ b/mkspecs/irix-cc-o32/qmake.conf
@@ -29,7 +29,7 @@ QMAKE_CFLAGS_YACC	= -woff 3203,3262
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/irix-cc/qmake.conf b/mkspecs/irix-cc/qmake.conf
index b2978fd24..39af78b96 100644
--- a/mkspecs/irix-cc/qmake.conf
+++ b/mkspecs/irix-cc/qmake.conf
@@ -55,7 +55,7 @@ QMAKE_CFLAGS_YACC	= -woff 1110,1174,3262
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= -n32 -signed -woff 1021,1209,1233,1314,1355,1375,1424,1506,1681,1682,3496
+QMAKE_CXXFLAGS		= -n32 -signed -woff 1021,1209,1233,1314,1355,1375,1424,1506,1681,1682,3496 -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/irix-g++/qmake.conf b/mkspecs/irix-g++/qmake.conf
index 03da1bc91..9b605a543 100644
--- a/mkspecs/irix-g++/qmake.conf
+++ b/mkspecs/irix-g++/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-clang/qmake.conf b/mkspecs/linux-clang/qmake.conf
index 2e2296744..d014a1e9f 100644
--- a/mkspecs/linux-clang/qmake.conf
+++ b/mkspecs/linux-clang/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= clang++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-cxx/qmake.conf b/mkspecs/linux-cxx/qmake.conf
index c12a9efbb..ff1d89c6a 100644
--- a/mkspecs/linux-cxx/qmake.conf
+++ b/mkspecs/linux-cxx/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_SHLIB	=
 QMAKE_CFLAGS_YACC	= -Olimit 1000
 
 QMAKE_CXX		= cxx
-QMAKE_CXXFLAGS		= -w
+QMAKE_CXXFLAGS		= -w -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-ecc-64/qmake.conf b/mkspecs/linux-ecc-64/qmake.conf
index 6261a1869..f8738176f 100644
--- a/mkspecs/linux-ecc-64/qmake.conf
+++ b/mkspecs/linux-ecc-64/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= ecpc
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-g++-32/qmake.conf b/mkspecs/linux-g++-32/qmake.conf
index cc18f1b11..6408ed414 100644
--- a/mkspecs/linux-g++-32/qmake.conf
+++ b/mkspecs/linux-g++-32/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-g++-64/qmake.conf b/mkspecs/linux-g++-64/qmake.conf
index 05015e547..d083d3d04 100644
--- a/mkspecs/linux-g++-64/qmake.conf
+++ b/mkspecs/linux-g++-64/qmake.conf
@@ -30,7 +30,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-g++-sparc/qmake.conf b/mkspecs/linux-g++-sparc/qmake.conf
index 4c39abcb3..fe62f5803 100644
--- a/mkspecs/linux-g++-sparc/qmake.conf
+++ b/mkspecs/linux-g++-sparc/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-g++/qmake.conf b/mkspecs/linux-g++/qmake.conf
index f717e6feb..dc910aa72 100644
--- a/mkspecs/linux-g++/qmake.conf
+++ b/mkspecs/linux-g++/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-icc/qmake.conf b/mkspecs/linux-icc/qmake.conf
index b2b2aff27..c5d483779 100644
--- a/mkspecs/linux-icc/qmake.conf
+++ b/mkspecs/linux-icc/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= icpc
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-kcc/qmake.conf b/mkspecs/linux-kcc/qmake.conf
index 53e292134..072a5a765 100644
--- a/mkspecs/linux-kcc/qmake.conf
+++ b/mkspecs/linux-kcc/qmake.conf
@@ -32,7 +32,7 @@ QMAKE_CFLAGS_YACC	= --diag_suppress 111,177
 QMAKE_CFLAGS_THREAD	= --thread_safe
 
 QMAKE_CXX		= KCC
-QMAKE_CXXFLAGS		= --display_error_number --diag_suppress 611,1142 --backend -pipe
+QMAKE_CXXFLAGS		= --display_error_number --diag_suppress 611,1142 --backend -pipe -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-kylix/qmake.conf b/mkspecs/linux-kylix/qmake.conf
index c727d5bab..68ee83007 100644
--- a/mkspecs/linux-kylix/qmake.conf
+++ b/mkspecs/linux-kylix/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= bc++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -P
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -P -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/linux-pgcc/qmake.conf b/mkspecs/linux-pgcc/qmake.conf
index f6a396f11..5a49d4301 100644
--- a/mkspecs/linux-pgcc/qmake.conf
+++ b/mkspecs/linux-pgcc/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= pgCC
-QMAKE_CXXFLAGS		= --display_error_number $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= --display_error_number $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/lynxos-g++/qmake.conf b/mkspecs/lynxos-g++/qmake.conf
index ae3b23912..1825b047c 100644
--- a/mkspecs/lynxos-g++/qmake.conf
+++ b/mkspecs/lynxos-g++/qmake.conf
@@ -26,7 +26,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/macx-g++/qmake.conf b/mkspecs/macx-g++/qmake.conf
index f90d2af19..61d1d6252 100644
--- a/mkspecs/macx-g++/qmake.conf
+++ b/mkspecs/macx-g++/qmake.conf
@@ -28,7 +28,7 @@ QMAKE_EXTENSION_SHLIB	= dylib
 QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 
 QMAKE_CXX		= c++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/macx-pbuilder/qmake.conf b/mkspecs/macx-pbuilder/qmake.conf
index 0699a9c2e..6402ec481 100644
--- a/mkspecs/macx-pbuilder/qmake.conf
+++ b/mkspecs/macx-pbuilder/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_EXTENSION_SHLIB	= dylib
 QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 
 QMAKE_CXX		= 
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/macx-xlc/qmake.conf b/mkspecs/macx-xlc/qmake.conf
index b7e9d789a..477fc14b9 100644
--- a/mkspecs/macx-xlc/qmake.conf
+++ b/mkspecs/macx-xlc/qmake.conf
@@ -24,7 +24,7 @@ QMAKE_CFLAGS_THREAD	= -qthreaded
 
 QMAKE_CXX		= xlc++
 QMAKE_CXX_THREAD	= xlc++_r
-QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= -+ $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/netbsd-g++/qmake.conf b/mkspecs/netbsd-g++/qmake.conf
index 985455998..a15a8f09e 100644
--- a/mkspecs/netbsd-g++/qmake.conf
+++ b/mkspecs/netbsd-g++/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/openbsd-g++/qmake.conf b/mkspecs/openbsd-g++/qmake.conf
index 434bb7318..9a98f95be 100644
--- a/mkspecs/openbsd-g++/qmake.conf
+++ b/mkspecs/openbsd-g++/qmake.conf
@@ -23,7 +23,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -pthread
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -fvisibility-inlines-hidden -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/qnx-g++/qmake.conf b/mkspecs/qnx-g++/qmake.conf
index a7c5800b2..be1edf019 100644
--- a/mkspecs/qnx-g++/qmake.conf
+++ b/mkspecs/qnx-g++/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses -fno-inline -fno-pack-struct
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/solaris-cc-64/qmake.conf b/mkspecs/solaris-cc-64/qmake.conf
index a00af10fd..6d20fe67e 100644
--- a/mkspecs/solaris-cc-64/qmake.conf
+++ b/mkspecs/solaris-cc-64/qmake.conf
@@ -42,7 +42,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -mt
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/solaris-cc/qmake.conf b/mkspecs/solaris-cc/qmake.conf
index 8dd0ee31b..7b6120423 100644
--- a/mkspecs/solaris-cc/qmake.conf
+++ b/mkspecs/solaris-cc/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	=
 QMAKE_CFLAGS_THREAD	= -mt
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/solaris-g++-64/qmake.conf b/mkspecs/solaris-g++-64/qmake.conf
index 7c1df3942..ce6000cb5 100644
--- a/mkspecs/solaris-g++-64/qmake.conf
+++ b/mkspecs/solaris-g++-64/qmake.conf
@@ -46,7 +46,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/solaris-g++/qmake.conf b/mkspecs/solaris-g++/qmake.conf
index 63d23d27a..a31d3daab 100644
--- a/mkspecs/solaris-g++/qmake.conf
+++ b/mkspecs/solaris-g++/qmake.conf
@@ -29,7 +29,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	= -D_REENTRANT
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/unixware-cc/qmake.conf b/mkspecs/unixware-cc/qmake.conf
index d120e64c1..e88feb3c1 100644
--- a/mkspecs/unixware-cc/qmake.conf
+++ b/mkspecs/unixware-cc/qmake.conf
@@ -27,7 +27,7 @@ QMAKE_CFLAGS_YACC	= -Wf,--diag_suppress,111 -Wf,--diag_suppress,177
 QMAKE_CFLAGS_THREAD	= -Kthread
 
 QMAKE_CXX		= CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -Wf,--display_error_number -Wf,--diag_suppress,838
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -Wf,--display_error_number -Wf,--diag_suppress,838 -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE -Tused
diff --git a/mkspecs/unixware-g++/qmake.conf b/mkspecs/unixware-g++/qmake.conf
index fb76b053b..5405f0922 100644
--- a/mkspecs/unixware-g++/qmake.conf
+++ b/mkspecs/unixware-g++/qmake.conf
@@ -25,7 +25,7 @@ QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
 QMAKE_CFLAGS_THREAD	=
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/win32-g++/qmake.conf b/mkspecs/win32-g++/qmake.conf
index bef50fa70..b5232ab1d 100644
--- a/mkspecs/win32-g++/qmake.conf
+++ b/mkspecs/win32-g++/qmake.conf
@@ -33,7 +33,7 @@ QMAKE_CFLAGS_EXCEPTIONS_ON = -fexceptions
 QMAKE_CFLAGS_EXCEPTIONS_OFF = -fno-exceptions
 
 QMAKE_CXX		= g++
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_DEPS	= $$QMAKE_CFLAGS_DEPS
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
diff --git a/mkspecs/win32-icc/qmake.conf b/mkspecs/win32-icc/qmake.conf
index 27590c3ef..de4b9df51 100644
--- a/mkspecs/win32-icc/qmake.conf
+++ b/mkspecs/win32-icc/qmake.conf
@@ -37,7 +37,7 @@ QMAKE_CFLAGS_EXCEPTIONS_ON = -GX
 QMAKE_CFLAGS_EXCEPTIONS_OFF =
 
 QMAKE_CXX		= $$QMAKE_CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/win32-msvc.net/qmake.conf b/mkspecs/win32-msvc.net/qmake.conf
index eefcbe09a..f95c9f751 100644
--- a/mkspecs/win32-msvc.net/qmake.conf
+++ b/mkspecs/win32-msvc.net/qmake.conf
@@ -37,7 +37,7 @@ QMAKE_CFLAGS_EXCEPTIONS_ON = -GX
 QMAKE_CFLAGS_EXCEPTIONS_OFF =
 
 QMAKE_CXX		= $$QMAKE_CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON -w34100 -w34189
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/win32-msvc/qmake.conf b/mkspecs/win32-msvc/qmake.conf
index d824b958b..a98d8f09b 100644
--- a/mkspecs/win32-msvc/qmake.conf
+++ b/mkspecs/win32-msvc/qmake.conf
@@ -37,7 +37,7 @@ QMAKE_CFLAGS_EXCEPTIONS_ON = -GX
 QMAKE_CFLAGS_EXCEPTIONS_OFF =
 
 QMAKE_CXX		= $$QMAKE_CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/win32-msvc2005/qmake.conf b/mkspecs/win32-msvc2005/qmake.conf
index 141657e02..7e7e1f541 100644
--- a/mkspecs/win32-msvc2005/qmake.conf
+++ b/mkspecs/win32-msvc2005/qmake.conf
@@ -39,7 +39,7 @@ QMAKE_CFLAGS_EXCEPTIONS_ON = -EHsc
 QMAKE_CFLAGS_EXCEPTIONS_OFF =
 
 QMAKE_CXX		= $$QMAKE_CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON -w34100 -w34189
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE
diff --git a/mkspecs/win32-watcom/qmake.conf b/mkspecs/win32-watcom/qmake.conf
index cc4d0021d..99ed69f51 100644
--- a/mkspecs/win32-watcom/qmake.conf
+++ b/mkspecs/win32-watcom/qmake.conf
@@ -21,7 +21,7 @@ QMAKE_CFLAGS_DEBUG	= -d2
 QMAKE_CFLAGS_YACC	=
 
 QMAKE_CXX		= $$QMAKE_CC
-QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS
+QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS -std=c++17
 QMAKE_CXXFLAGS_WARN_ON	= $$QMAKE_CFLAGS_WARN_ON
 QMAKE_CXXFLAGS_WARN_OFF	= $$QMAKE_CFLAGS_WARN_OFF
 QMAKE_CXXFLAGS_RELEASE	= $$QMAKE_CFLAGS_RELEASE