diff options
| author | Lars Knoll <lars.knoll@digia.com> | 2013-10-01 12:34:20 +0200 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2013-10-31 22:01:40 +0100 |
| commit | d8bf317546bcfab0b6b50375218429fa9d470705 (patch) | |
| tree | 91bfee6bbf56d25002d819c46e5778e49d3c4679 /configure | |
| parent | e696bef863ba4cc21a36cbfdc0d6e811060916f7 (diff) | |
make qreal double by default on all platforms
On modern ARM CPUs there is no speed difference between
float and double anymore, so let's rather use double for
qreal to avoid rounding and precision issues. Like this
we also get much better compatibility with our desktop
OSes.
This is not binary compatible on ARM, but the old behavior
can be restored by passing -qreal float to configure.
Change-Id: I2a4b61e19a3dfa6b0bd76734cecf2634c97207fc
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'configure')
| -rwxr-xr-x | configure | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -1006,6 +1006,7 @@ QPA_PLATFORM_GUARD=yes CFG_CXX11=auto CFG_DIRECTWRITE=no CFG_WERROR=auto +CFG_QREAL=double OPT_MAC_SDK= # initalize variables used for installation @@ -1168,6 +1169,7 @@ while [ "$#" -gt 0 ]; do -mysql_config| \ -qpa| \ -qconfig| \ + -qreal| \ -android-sdk| \ -android-ndk| \ -android-ndk-platform| \ @@ -1419,6 +1421,9 @@ while [ "$#" -gt 0 ]; do qconfig) CFG_QCONFIG="$VAL" ;; + qreal) + CFG_QREAL="$VAL" + ;; sysroot) CFG_SYSROOT="$VAL" ;; @@ -3699,6 +3704,9 @@ Additional options: -qconfig local ...... Use src/corelib/global/qconfig-local.h rather than the default ($CFG_QCONFIG). + -qreal [double|float] typedef qreal to the specified type. The default is double. + Note that changing this flag affects binary compatibility. + -no-opengl .......... Do not support OpenGL. -opengl <api> ....... Enable OpenGL support With no parameter, this will attempt to auto-detect @@ -6356,6 +6364,10 @@ if [ "$CFG_LARGEFILE" = "yes" ] && [ "$XPLATFORM_MINGW" != "yes" ]; then echo "#define QT_LARGEFILE_SUPPORT 64" >>"$outpath/src/corelib/global/qconfig.h.new" fi +if [ "$CFG_QREAL" != double ]; then + echo "#define QT_COORD_TYPE $CFG_QREAL" >>"$outpath/src/corelib/global/qconfig.h.new" +fi + if [ "$CFG_FRAMEWORK" = "yes" ]; then echo "#define QT_MAC_FRAMEWORK_BUILD" >>"$outpath/src/corelib/global/qconfig.h.new" fi @@ -6960,6 +6972,10 @@ if [ "$ORIG_CFG_XKBCOMMON" != qt ] && [ "$CFG_XKBCOMMON" = qt ]; then echo "NOTE: libxkbcommon 0.2.0 (or higher) not found on the system, will use " echo "the bundled version from 3rd party directory." fi +if [ "$CFG_QREAL" = double ] && [ "$CFG_ARCH" = arm ]; then + echo "NOTE: Qt is using double for qreal on this system. This is binary incompatible against Qt 5.1." + echo "Configure with '-qreal float' to create a build that is binary compatible with 5.1." +fi exec 1>&3 3>&- # restore stdout cat $outpath/config.summary # display config feedback to user |