C++ Qt - How to add "-std=c++11" to the makefile which is generated by qmake?
Solution 1:
You can add the following to the Qt .pro for C++11: -
CONFIG += c++11
As of Qt 5.4, C++14 can be enabled with
CONFIG += c++14
Solution 2:
You can change CXX flags :
QMAKE_CXXFLAGS += -std=c++11
I usually set it as :
QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -pedantic
Solution 3:
You may find it tempting to insert the specific flag (which you mention)
QMAKE_CXXFLAGS += -std=c++11
in your .pro file, but this will insert just that flag on your behalf.
That's insufficient. The right way is to insert instead
CONFIG += c++11
in your .pro file. Two or three necessary changes are then made by qmake
:
-
-std=c++11
is inserted. -
-stdlib=libc++
is inserted. - If you're on a Mac,
-mmacosx-version-min=10.6
becomes-mmacosx-version-min=10.7
. (Perhaps some similar change is necessary on other OSes or OS versions.)
(A similar issue at 1 and 2.)
Solution 4:
I'm using Snow Leopad 10.6.8 and gcc 4.9, I had to use
CONFIG += c++11
instead of
QMAKE_CXXFLAGS += -std=c++11
The latter was simply not recognized.