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working around a gcc optimzation bug with gcc 4/5/6 gcc 7 seems to be

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o.k.
This commit is contained in:
Uwe Rathmann 2017-11-03 19:58:21 +01:00
parent a9d0628dcd
commit 4b20544cd6
1 changed files with 14 additions and 2 deletions
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16
src/controls/QskControl.cpp
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@ -1307,8 +1307,20 @@ void QskControl::updateImplicitSize()
const QSizeF hint = contentsSizeHint();
const auto w = ( hint.width() >= 0 ) ? dw + hint.width() : 0.0;
const auto h = ( hint.height() >= 0 ) ? dh + hint.height() : 0.0;
const qreal w = ( hint.width() >= 0 ) ? dw + hint.width() : 0.0;
const qreal h = ( hint.height() >= 0 ) ? dh + hint.height() : 0.0;
#ifdef __GNUC__
#if ( __GNUC__ * 100 + __GNUC_MINOR__) <= 700
/*
Certain gcc optimizer ( >= -O2 ) seem to be too motivated
( found with gcc 5.3.1/6.2.1, gcc 7.1.1 is o.k. ).
A volatile local variable prevents those versions from creating wrong code.
*/
const volatile qreal dummy = w;
(void)dummy;
#endif
#endif
setupImplicitSizeConnections( false );
setImplicitSize( w, h );