dnl qt.m4

dnl Copyright (C) 2016 Intevation GmbH

dnl

dnl This file is part of gpgme and is provided under the same license as gpgme

dnl Autoconf macro to find either Qt4 or Qt5

dnl

dnl sets GPGME_QT_LIBS and GPGME_QT_CFLAGS

dnl

dnl if QT5 was found have_qt5_libs is set to yes

AC_DEFUN([FIND_QT],

[

  have_qt5_libs="no";

  PKG_CHECK_MODULES(GPGME_QT,

                    Qt5Core >= 5.0.0,

                    [have_qt5_libs="yes"],

                    [have_qt5_libs="no"])

  PKG_CHECK_MODULES(GPGME_QTTEST,

                    Qt5Test >= 5.0.0,

                    [have_qt5test_libs="yes"],

                    [have_qt5test_libs="no"])

  if ! test "$have_w32_system" = yes; then

    if "$PKG_CONFIG" --variable qt_config Qt5Core | grep -q "reduce_relocations"; then

      GPGME_QT_CFLAGS="$GPGME_QT_CFLAGS -fpic"

    fi

  fi

  if test "$have_qt5_libs" = "yes"; then

    AC_CHECK_TOOL(MOC, moc)

    AC_MSG_CHECKING([moc version])

    mocversion=`$MOC -v 2>&1`

    mocversiongrep=`echo $mocversion | grep -E "Qt 5|moc 5"`

    if test x"$mocversiongrep" != x"$mocversion"; then

      AC_MSG_RESULT([no])

      # moc was not the qt5 one, try with moc-qt5

      AC_CHECK_TOOL(MOC2, moc-qt5)

      mocversion=`$MOC2 -v 2>&1`

      mocversiongrep=`echo $mocversion | grep -E "Qt 5|moc-qt5 5|moc 5"`

      if test x"$mocversiongrep" != x"$mocversion"; then

        AC_CHECK_TOOL(QTCHOOSER, qtchooser)

        qt5tooldir=`QT_SELECT=qt5 qtchooser -print-env | grep QTTOOLDIR | cut -d '=' -f 2 | cut -d \" -f 2`

        mocversion=`$qt5tooldir/moc -v 2>&1`

        mocversiongrep=`echo $mocversion | grep -E "Qt 5|moc 5"`

        if test x"$mocversiongrep" != x"$mocversion"; then

          # no valid moc found

          have_qt5_libs="no";

        else

          MOC=$qt5tooldir/moc

        fi

      else

        MOC=$MOC2

      fi

    fi

    AC_MSG_RESULT([$mocversion])

    dnl Check that a binary can actually be build with this qt.

    dnl pkg-config may be set up in a way that it looks also for libraries

    dnl of the build system and not only for the host system. In that case

    dnl we check here that we can actually compile / link a qt application

    dnl for host.

    OLDCPPFLAGS=$CPPFLAGS

    CPPFLAGS=$GPGME_QT_CFLAGS

    OLDLIBS=$LIBS

    LIBS=$GPGME_QT_LIBS

    AC_LANG_PUSH(C++)

    AC_MSG_CHECKING([whether a simple qt program can be built])

    AC_LINK_IFELSE([AC_LANG_SOURCE([

    #include <QCoreApplication>

    int main (int argc, char **argv) {

    QCoreApplication app(argc, argv);

    app.exec();

    }])], [have_qt5_libs='yes'], [have_qt5_libs='no'])

    AC_MSG_RESULT([$have_qt5_libs])

    AC_LANG_POP()

    CPPFLAGS=$OLDCPPFLAGS

    LIBS=$OLDLIBS

  fi

])