qt5base-lts/mkspecs/features/static_runtime.prf

msvc {
    # -MD becomes -MT, -MDd becomes -MTd
    QMAKE_CFLAGS ~= s,^-MD(d?)$,-MT\1,g
    QMAKE_CXXFLAGS ~= s,^-MD(d?)$,-MT\1,g
} else: mingw {
    QMAKE_LFLAGS += -static
}
Windows: Add -static-runtime configure option Support statically linking the MSVC/mingw runtime libraries without manually tweaking mkspecs. This is helpful for projects like the installer framework. MSVC does not support mixing MT[d]/MD[d] flags in different compilation units. The static_runtime option is therefore added to both QT_CONFIG and CONFIG. Change-Id: Ifd6dc9c362090457de8e2c62477d0445f9479722 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com> 2015-02-20 10:07:09 +00:00			`msvc {`
			`# -MD becomes -MT, -MDd becomes -MTd`
qmake: Remove the extra space before -MT Removing the extra space before -MT ensures that the vcxproj generator gets valid input. Change-Id: Iccf88c5fc4473db406d714b646185a4fb60a3418 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io> 2018-10-02 12:02:01 +00:00			`QMAKE_CFLAGS ~= s,^-MD(d?)$,-MT\1,g`
			`QMAKE_CXXFLAGS ~= s,^-MD(d?)$,-MT\1,g`
Windows: Add -static-runtime configure option Support statically linking the MSVC/mingw runtime libraries without manually tweaking mkspecs. This is helpful for projects like the installer framework. MSVC does not support mixing MT[d]/MD[d] flags in different compilation units. The static_runtime option is therefore added to both QT_CONFIG and CONFIG. Change-Id: Ifd6dc9c362090457de8e2c62477d0445f9479722 Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com> 2015-02-20 10:07:09 +00:00			`} else: mingw {`
			`QMAKE_LFLAGS += -static`
			`}`