Hello! The details are here: https://www.linuxquestions.org/questions/slackware-14/can%27t-compile-mlt-6-10-0-on-stable-4175636167/#post5890571
If you need to compile mlt with QT5 support, QT5 must be compile with C++11, and mlt needs added flag to tell configure about c++11. Otherwise compile/install mlt first (defaults to qt4) and then compile/install qt5. Attached are 2 diffs against today's SBo master to resolve this issue. Have fun. -Ed
diff --git a/libraries/qt5/qt5.SlackBuild b/libraries/qt5/qt5.SlackBuild
index 7b829ff5f3..7351494397 100644
--- a/libraries/qt5/qt5.SlackBuild
+++ b/libraries/qt5/qt5.SlackBuild
@@ -50,6 +50,14 @@ VERSION=${VERSION:-5.7.1}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
+if [ "${WITHC11:-no}" == "yes" ]; then
+ C11FLAG="-std=c++11"
+ C11CONF="-c++std c++11"
+else
+ C11FLAG=""
+ C11CONF=""
+fi
+
if [ -z "$ARCH" ]; then
case "$( uname -m )" in
i?86) ARCH=i586 ;;
@@ -128,7 +136,7 @@ fi
echo "$PRCOD" >> qtwebengine/.qmake.conf
export CFLAGS="$SLKCFLAGS"
-export CXXFLAGS="$SLKCFLAGS"
+export CXXFLAGS="$SLKCFLAGS $C11FLAG"
./configure -v \
-confirm-license \
-opensource \
@@ -159,6 +167,7 @@ export CXXFLAGS="$SLKCFLAGS"
-release \
-no-use-gold-linker \
-pulseaudio \
+ $C11CONF \
$RELOCATIONS \
$BUILD_EXAMPLES
diff --git a/multimedia/mlt/mlt.SlackBuild b/multimedia/mlt/mlt.SlackBuild
index f3d75a2073..1ac0615fb7 100644
--- a/multimedia/mlt/mlt.SlackBuild
+++ b/multimedia/mlt/mlt.SlackBuild
@@ -50,7 +50,8 @@
# 22-OCT-2016 add qt5 support, bug fixes/addenda (Larry Hajali)
# 29-JAN-2017 version update
# 16-APR-2017 Compiling with vdpau is no longer supported ffmpeg-3.x
-# 08-AUG-2018 verion update, remove qt5 patch
+# 08-AUG-2018 version update, remove qt5 patch
+# 18-AUG-2018 add -std=c++11 to allow compile with Qt5
PRGNAM=mlt
VERSION=${VERSION:-6.10.0}
@@ -82,9 +83,11 @@ if [ -f "$(which csharp)" ]; then csharp="csharp"; else csharp=""; fi
if [ -f "$(which ruby)" ]; then ruby="ruby"; else ruby=""; fi
# Use qt5 if present, otherwise system default
+QTCXX=""
if pkg-config --exists Qt5 ; then
qt="--qt-libdir=$(pkg-config Qt5 --variable=libdir)
--qt-includedir=$(pkg-config Qt5 --variable=headerdir)"
+ QTCXX="-std=c++11"
else
qt="--qt-libdir=$(pkg-config Qt --variable=libdir)
--qt-includedir=$(pkg-config Qt --variable=headerdir)"
@@ -120,7 +123,7 @@ find -L . \
-o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
CFLAGS="$SLKCFLAGS" \
-CXXFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS $QTCXX" \
./configure \
--disable-debug \
--prefix=/usr \
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