+ dnl Check if it possible to do a pkg-config
+ PKG_PROG_PKG_CONFIG
+ dnl Not possible with Qt6 (QTBUG-86080)
+ if test x$USE_QT6 = xno ; then
+ if test -n "$PKG_CONFIG" ; then
+ QT_DO_PKG_CONFIG
+ fi
+ if test "$pkg_failed" != "no" ; then
+ QT_DO_MANUAL_CONFIG
+ fi
+ else
+ QT6_QMAKE_CONFIG
+ if test -z "$QT_LIB"; then
+ QT_DO_MANUAL_CONFIG
+ fi
+ fi
+
+ if test -z "$QT_LIB"; then
+ dnl Try again with Qt5 and if configuring for Qt6/5 fails
+ if test x$USE_QT6 = xyes ; then
+ USE_QT6=no
+ AC_SUBST([USE_QT6])
+ if test -n "$PKG_CONFIG" ; then
+ QT_DO_PKG_CONFIG
+ fi
+ if test "$pkg_failed" != "no" ; then
+ QT_DO_MANUAL_CONFIG
+ fi
+ if test -z "$QT_LIB"; then
+ AC_MSG_ERROR([cannot find qt libraries.])
+ fi
+ else
+ AC_MSG_ERROR([cannot find qt libraries.])
+ fi
+ fi
+
+ dnl Check qt version
+ AS_VERSION_COMPARE($QTLIB_VERSION, $1,
+ [AC_MSG_ERROR([LyX requires at least version $1 of Qt. Only version $QTLIB_VERSION has been found.])
+ ])
+
+ case $QTLIB_VERSION in
+ 6.*) if test $enable_stdlib_debug = "yes" ; then
+ LYX_WARNING([Compiling LyX with stdlib-debug and Qt6 library may lead to
+ crashes. Consider dropping --enable-stdlib-debug.])
+ fi;;
+ esac
+
+
+ save_CPPFLAGS=$CPPFLAGS
+ CPPFLAGS="$save_CPPFLAGS $QT_CORE_INCLUDES"
+ AC_CHECK_HEADER(QtGui/qtgui-config.h,
+ [lyx_qt5_config=QtGui/qtgui-config.h],
+ [lyx_qt5_config=qconfig.h])
+ AC_CHECK_HEADER(QtGui/private/qtgui-config_p.h,
+ [lyx_qt6_config=QtGui/private/qtgui-config_p.h],
+ [lyx_qt6_config=qconfig.h])
+ AC_MSG_CHECKING([whether Qt uses the X Window system])
+ if test x$USE_QT6 = xyes ; then
+ dnl FIXME: Check whether defining QPA_XCB makes sense with Qt6
+ AC_PREPROC_IFELSE([AC_LANG_SOURCE([
+ [#include <$lyx_qt6_config>]
+ [#if !defined(QT_FEATURE_xcb) || QT_FEATURE_xcb < 0]
+ [#error Fail]
+ [#endif]])],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE(QPA_XCB, 1, [Define if Qt uses the X Window System])],
+ [AC_MSG_RESULT(no)])
+ else
+ AC_EGREP_CPP(xcb,
+ [#include <$lyx_qt5_config>
+ QT_QPA_DEFAULT_PLATFORM_NAME],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE(QPA_XCB, 1, [Define if Qt uses the X Window System])],
+ [AC_MSG_RESULT(no)])
+ fi
+ CPPFLAGS=$save_CPPFLAGS
+
+ QT_FIND_TOOL([QT_MOC], [moc])
+ QT_FIND_TOOL([QT_UIC], [uic])
+ QT_FIND_TOOL([QT_RCC], [rcc])
+
+ dnl Safety check
+ mocqtver=`$QT_MOC -v 2>&1 | sed -e 's/.*\([[0-9]]\.[[0-9]]*\.[[0-9]]*\).*/\1/'`
+ if test "x$mocqtver" != "x$QTLIB_VERSION"; then
+ LYX_WARNING([The found moc compiler is for Qt $mocqtver but the Qt library version is $QTLIB_VERSION.])
+ fi
+])
+
+AC_DEFUN([QT_DO_PKG_CONFIG],
+[
+ dnl tell pkg-config to look also in $qt_cv_dir/lib.
+ save_PKG_CONFIG_PATH=$PKG_CONFIG_PATH
+ if test -n "$qt_cv_dir" ; then
+ PKG_CONFIG_PATH=$qt_cv_dir/lib:$qt_cv_dir/lib/pkgconfig:$PKG_CONFIG_PATH
+ export PKG_CONFIG_PATH
+ fi
+ qt_corelibs="Qt5Core"
+ qt_guilibs="Qt5Core Qt5Concurrent Qt5Gui Qt5Svg Qt5Widgets"
+ lyx_use_x11extras=false
+ PKG_CHECK_EXISTS(Qt5X11Extras, [lyx_use_x11extras=true], [])
+ if $lyx_use_x11extras; then
+ qt_guilibs="$qt_guilibs Qt5X11Extras xcb"
+ AC_DEFINE(HAVE_QT5_X11_EXTRAS, 1,
+ [Define if you have the Qt5X11Extras module])
+ fi
+ lyx_use_winextras=false
+ PKG_CHECK_EXISTS(Qt5WinExtras, [lyx_use_winextras=true], [])
+ if $lyx_use_winextras; then
+ qt_guilibs="$qt_guilibs Qt5WinExtras"
+ fi
+ lyx_use_macextras=false
+ PKG_CHECK_EXISTS(Qt5MacExtras, [lyx_use_macextras=true], [])
+ if $lyx_use_macextras; then
+ qt_guilibs="$qt_guilibs Qt5MacExtras"