[SOLVED] Latest mkvtoolnix and qt6

kgha · 01-03-2024, 03:43 AM

Trying to compile latest mkvtoolnix-82 which requires qt6.2.0 or higher. So I installed qt6.6.1 and the dependencies from
https://ponce.cc/slackware/qt6_and_deps/current/x86_64/
However, configure process ends with

Code:

checking for qmake6... no
checking for qmake-qt6... qmake-qt6
checking for qmake6's version... 6.6.1
checking for lconvert... /usr/lib64/qt6/bin/lconvert
checking for moc... /usr/lib64/qt6/libexec/moc
checking for rcc... /usr/lib64/qt6/libexec/rcc
checking for uic... /usr/lib64/qt6/libexec/uic
checking for Qt 6... no: could not compile a test program
configure: error: The Qt library version >=  is required for building MKVToolNix.

So I must have missed something, but what?

Thom1b · 01-03-2024, 03:55 AM

Same issue here except qmake6 is found at the first time, I still don't found how to fix that.

Code:

checking for qmake6... qmake6
checking for qmake6's version... 6.6.1
checking for lconvert... /usr/lib64/qt6/bin/lconvert
checking for moc... /usr/lib64/qt6/libexec/moc
checking for rcc... /usr/lib64/qt6/libexec/rcc
checking for uic... /usr/lib64/qt6/libexec/uic
checking for Qt 6... no: could not compile a test program
configure: error: The Qt library version >=  is required for building MKVToolNix.

ponce · 01-03-2024, 06:13 AM

what actually happens is that gcc errors because of an unrecognized option (-ccc-gcc-name, you can see it in the config.log file) probably because qt6 has been built using clang: just force using clang too for mkvtoolnix adding these two lines before the configure block

Code:

export CC=clang
export CXX=clang++

kgha · 01-03-2024, 08:58 AM

Thanks, ponce, a step forward - now building fails with

Code:

./configure: line 6425: clang++s: command not found
checking compiler type and version... gcc 
checking for lld... /usr/bin/lld
checking for support for the "-std=c++17" flag... no
checking for support for C++17 feature "attribute 'maybe_unused'"... no
checking for support for C++17 feature "nested namespace definition"... no
checking for support for C++17 feature "structured bindings"... no
checking for support for C++17 feature "std::optional"... no
checking for support for C++17 feature "std::gcd"... no
checking for support for C++17 feature "constexpr if"... no
checking for libraries to link against for the file system library... 
The following features of the C++17 standards are not supported by clang++s:
  * attribute 'maybe_unused' (C++17)
  * nested namespace definition (C++17)
  * structured bindings (C++17)
  * std::optional (C++17)
  * std::gcd (C++17)
  * constexpr if (C++17)
If you are using the GNU C compiler collection (gcc), you need
at least v8; for clang v7 and newer should work.
configure: error: support for required C++17 features incomplete

giomat · 01-03-2024, 09:03 AM

Check your slackbuild edit, seems there is a typo in how you spelled clang++

ponce · 01-03-2024, 09:19 AM

maybe there's a misunderstanding: I meant that this block

Code:

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --build=$ARCH-slackware-linux \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --mandir=/usr/man \
  --localstatedir=/var \
  --enable-gui="$GUI" \
  --disable-static \
  --disable-update-check \
  --docdir=/usr/$PRGNAM-$VERSION \
  --htmldir=/usr/$PRGNAM-$VERSION \
  --with-boost

must become this (with the two lines added before the original one)

Code:

export CC=clang
export CXX=clang++

CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
  --build=$ARCH-slackware-linux \
  --prefix=/usr \
  --libdir=/usr/lib${LIBDIRSUFFIX} \
  --sysconfdir=/etc \
  --mandir=/usr/man \
  --localstatedir=/var \
  --enable-gui="$GUI" \
  --disable-static \
  --disable-update-check \
  --docdir=/usr/$PRGNAM-$VERSION \
  --htmldir=/usr/$PRGNAM-$VERSION \
  --with-boost

kgha · 01-03-2024, 09:21 AM

Quote:

Originally Posted by giomat

Check your slackbuild edit, seems there is a typo in how you spelled clang++

Copy/pasted ponce's post, so hardly a typo.

Replaced ponce's Qt6 package with AlienBOB's from https://slackware.nl/alien-kde/current/6/x86_64/deps/

Compiling right now, takes a while but so far no issues.

EDIT: built successfully, seems to run OK (haven't tried all functions, of course).

I'll mark this as solved.

Thom1b · 01-03-2024, 09:36 AM

Thanks ponce, it works fine!

Quote:

Originally Posted by ponce

what actually happens is that gcc errors because of an unrecognized option (-ccc-gcc-name, you can see it in the config.log file) probably because qt6 has been built using clang: just force using clang too for mkvtoolnix adding these two lines before the configure block

Code:

export CC=clang
export CXX=clang++

kgha · 01-03-2024, 09:54 AM

Quote:

Originally Posted by ponce

maybe there's a misunderstanding:

Thanks again, ponce. Not so much a misunderstanding, more of a stupid mistake. I put the two lines not before the block but before the ./configure line.
After putting the lines in their proper place, mkvtoolnix compiles fine using clang.