configure: error: Qt library not found

Justin

Which Qt library?

mts19

It doesn't really say. This from the config.ac
I was presuming it to be qt4.

dnl Check for QTDIR environment variable.
AC_MSG_CHECKING([whether QTDIR environment variable is set])
if test "x$QTDIR" = "x"; then
AC_MSG_RESULT([no])
AC_MSG_ERROR([QTDIR must be properly set.])
else
AC_MSG_RESULT([$QTDIR])
fi

dnl Checks for Qt library.
AC_CACHE_CHECK([for Qt library],
ac_qtlib, [
for X in qt-mt qt; do
if test "x$ac_qtlib" = "x"; then
if test -f $QTDIR/lib/lib$X.so -o -f $QTDIR/lib/lib$X.a; then
ac_qtlib=$X
fi
fi
done
])
if test "x$ac_qtlib" = "x"; then
AC_MSG_ERROR([Qt library not found. Maybe QTDIR isn't properly set.])
fi

mts19

found this as well.
AC_CACHE_CHECK([for Qt library version >= 3.1.1],
ac_qtlib_version, [
AC_TRY_LINK([#include "qglobal.h"], [
#if QT_VERSION < 0x030101
#error Qt library 3.1.1 or greater required.
#endif

Justin

If it has one, run the ./configure, it'll tell you what it wants.

mts19

checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking how to run the C preprocessor... gcc -E
checking whether QTDIR environment variable is set... /usr/share/qt4
checking for Qt library...
configure: error: Qt library not found. Maybe QTDIR isn't properly set.

mts19

Tried to set QTDIR as found on one post but that does not work.
I am somewhat of a noob when it comes to compiling.

kyrios

sudo eopkg it qt4-devel (but be warned Qt4 is dying)

mts19

Qt4-devel is already installed.

mts19

Still trying to work out why configure cannot find the Qt libraries.
This from configure:
checking whether QTDIR environment variable is set... /usr/lib64/qt5
checking for Qt library...
configure: error: Qt library not found. Maybe QTDIR isn't properly set.

In configure.ac it has the section below.
dnl Checks for Qt library.
AC_CACHE_CHECK([for Qt library],
ac_qtlib, [
for X in qt-mt qt; do
if test "x$ac_qtlib" = "x"; then
if test -f $QTDIR/lib/lib$X.so -o -f $QTDIR/lib/lib$X.a; then
ac_qtlib=$X
fi
fi
done
])
It seems from my searching on the web that solus uses a different folder structure to Ubuntu/Mint Fedora.
It appears that configure is trying to find the Qt libraries in a sub-folder /lib of the QT install.
The libraries are in /usr/lib.

How can I change the config.ac to have it find the Qt libraries.
Will attach the configure.ac if someone wants to look at it.
Says files of this type cannot be uploaded.
Will paste it below.

`dnl Process this file with autoconf to produce a configure script.

AC_INIT([src/main.cpp]) dnl a source file from your sub dir

dnl This ksh/zsh feature conflicts with cd blah ; pwd
unset CDPATH

dnl Perform program name transformation
AC_ARG_PROGRAM

dnl Automake doc recommends to do this only here. (Janos)
AM_INIT_AUTOMAKE(qtuneroid, 0.9) dnl searches for some needed programs

AC_PROG_CC
AC_PROG_CXX
AC_PROG_CPP

dnl generate the config header
AM_CONFIG_HEADER(config.h) dnl at the distribution this done

if test "$prefix" = "NONE"; then

prefix=$ac_default_prefix

ac_configure_args="$ac_configure_args --prefix $prefix"

fi

#define package directory
eval eval eval sharedir=${datadir}
AC_DEFINE_UNQUOTED(QTUNEROID_DATADIR,
"$sharedir/$PACKAGE",
[location of arch-independent files])

dnl Some needed compiler options
CPPFLAGS="$CXXFLAGS $USE_EXCEPTIONS $USE_RTTI -DQT_NO_COMPAT -DQT_CLEAN_NAMESPACE -D_REENTRANT"

dnl Checks for programs.
#AC_CHECK_COMPILERS
AC_ENABLE_SHARED(yes)
AC_ENABLE_STATIC(no)

dnl Check for Qt multi-thread support.
if test "x$ac_qtlib" = "xqt-mt"; then
ac_thread="thread"
fi
AC_SUBST(ac_thread)

CPPFLAGS="$CPPFLAGS -I$QTDIR/include"
LIBS="-L$QTDIR/lib -L/usr/X11R6/lib"

AC_CACHE_CHECK([for Qt library version >= 3.1.1],
ac_qtlib_version, [
AC_TRY_LINK([#include "qglobal.h"], [
#if QT_VERSION < 0x030101
#error Qt library 3.1.1 or greater required.
#endif
],
ac_qtlib_version="yes", [
echo "no; Qt 3.1.1 or greater is required"
exit
])
])

dnl A common error message:
ac_qtdir_errmsg="not found in current PATH. Maybe QT development environment isn't available (qt3-devel)."

dnl Check for Qt moc utility.
AC_PATH_PROG(ac_moc, moc, [no], $QTDIR/bin:${PATH})
if test "x$ac_moc" = "xno"; then
AC_MSG_ERROR([moc $ac_qtdir_errmsg])
fi
AC_SUBST(ac_moc)

dnl Checks for libraries.
AC_CHECK_LIB(m, main)
AC_CHECK_LIB(X11, main)
AC_CHECK_LIB(Xext, main)
AC_CHECK_LIB($ac_qtlib, main)
AC_CHECK_LIB(asound, main)

dnl Check for ALSA libraries.
AC_CHECK_LIB(asound, main, [ac_alsa_lib="yes"], [ac_alsa_lib="no"])
if test "x$ac_alsa_lib" = "xno"; then
AC_MSG_ERROR([ALSA library not found.])
fi

dnl Check for ALSA headers.
AC_CHECK_HEADER(alsa/asoundlib.h, [ac_alsa_h="yes"], [ac_alsa_h="no"])
if test "x$ac_alsa_h" = "xno"; then
AC_MSG_ERROR([ALSA headers not found.])
fi

AC_CONFIG_FILES([ Makefile ])
#AC_CONFIG_FILES([ doc/Makefile ])
#AC_CONFIG_FILES([ doc/en/Makefile ])
#AC_CONFIG_FILES([ po/Makefile ])
AC_CONFIG_FILES([ src/Makefile ])
AC_CONFIG_FILES([ src/pics/Makefile ])
AC_CONFIG_FILES([ src/i18n/Makefile ])
AC_OUTPUT
if test "$all_tests" = "bad"; then
if test ! "$cache_file" = "/dev/null"; then
echo ""

echo "Please remove the file $cache_file after changing your setup"
echo "so that configure will find the changes next time."
echo ""
fi
else
echo ""
echo "Good - your configure finished. Start make now"
echo ""
fi`

Justin

Wondering if it's looking for Qt3, what is this software?

Edit: "not found in current PATH. Maybe QT development environment isn't available (qt3-devel)."

Wow, it's looking for Qt3..

mts19

Hi Justin, and thanks for your help.
I thought it might be looking for Qt3.
It is a QT port of a KDE instrument tuner.
Searching for an instrument tuner on Linux the options are few.
I really would like to build this somehow as I have tried a couple of others and failed.
Qt3 is not available in Solus repos.
Does this mean I am so out of luck.
Contacting the person who ported it (QTuneroid) is not possible.

Justin

mts19 What's the name of the application? It may be able to be compiled by forcing Qt4 or 5 libraries. Or a snap/flatpak/appimage might be available.

mts19

It is called Qtuneroid. I found it on sourceforge but have no way to contact the person who ported it.
https://sourceforge.net/projects/qtuneroid/
How would it be possible to compile it with Qt4 or Qt5 libraries?
I struggle with compiling things. It is a huge learning curve.

mts19

Hi Justin,
I just tried once more to compile another tuner and at the end of the build process I get the following error.
/usr/bin/ld: cannot find -lQt5Svg
collect2: error: ld returned 1 exit status
When I check for the file this is what is returned so not sure what the problem is.

mts19

Just ran make with prefix=/usr (as solus doesn't seem to use /usr/local)
Also made a symlink of libQt5Svg.so to LibQt5Svg.so.5.12.2 and didn't get the
/usr/bin/ld: cannot find -lQt5Sv error. I guess all my trials and errors are teaching me something.
Will clone the drive before installing just in case I messed something up.
It was a large build process which is why I was trying to compile the first tuner mentioned.
Thanks again for your help.:

kyrios

Perhaps it would help if you could give the link to the scripts you downloaded and the exact command you execute. Because at this stage it is just a big soup... In some places I see Qt4, in some others Qt5 so which one do you need exactly ? I have the feeling that you don't even know yourself.

mts19

Hi Kyrios, thanks for your reply.
The first tuner I was trying to compile is at:

https://sourceforge.net/projects/qtuneroid/

Requirements:

alsa-lib >= 0.9.1 <www.alsa-project.org>
qt toolkit >= 3.1.0 <www.trolltech.com>

Compilation and installation:

See INSTALL file for (unneeded) details.
Basically you have to type:
% ./configure
% make
% make install
When I run configure it uses the configure.ac which I included in a previous post.
This is the output of configure.
malcolm@solus _{/Install/qtuneroid-0.9} $ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking for gcc... gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking dependency style of g++... gcc3
checking how to run the C preprocessor... gcc -E
checking whether QTDIR environment variable is set... no
configure: error: QTDIR must be properly set.

Hope that helps.

Justin

I'd suggest looking for an alternative that was made this decade.

kyrios

Okay your application is so old that it requires qt3 because there is no libqt-mt.so or libqt.so in Qt 4 and above.

  for X in qt-mt qt; do
    if test "x$ac_qtlib" = "x"; then
      if test -f $QTDIR/lib/lib$X.so -o -f $QTDIR/lib/lib$X.a; then
        ac_qtlib=$X
      fi
    fi
  done