tAdd experimental support for GTK4 - vaccinewars - be a doctor and try to vaccinate the world
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       ---
 (DIR) commit 23d277d41e6577856ff102654fe776e310e60b65
 (DIR) parent 73a0da4f8a1d63dbb703e7523af9aae0b58319d7
 (HTM) Author: Ben Webb <ben@salilab.org>
       Date:   Mon, 28 Dec 2020 23:58:49 -0800
       
       Add experimental support for GTK4
       
       Diffstat:
         M configure.ac                        |      44 +++++++++++++++++++------------
       
       1 file changed, 27 insertions(+), 17 deletions(-)
       ---
 (DIR) diff --git a/configure.ac b/configure.ac
       t@@ -52,6 +52,10 @@ AC_ARG_ENABLE(gui-server,
        [  --enable-gui-server     use a simple GTK+/Win32 GUI for the server],
        [ GUI_SERVER="$enableval" ],[ GUI_SERVER="probe" ])
        
       +AC_ARG_ENABLE(gtk4,
       +[  --enable-gtk4           use GTK 4 if available (experimental)],
       +[ USE_GTK4="$enableval" ],[ USE_GTK4="no" ])
       +
        AC_ARG_ENABLE(gtk3,
        [  --disable-gtk3          use GTK+ 2.x, even if 3.x is found],
        [ USE_GTK3="$enableval" ],[ USE_GTK3="yes" ])
       t@@ -174,24 +178,30 @@ else
           gtk2_found="probe"
           if test "$GUI_CLIENT" != "no" -o "$GUI_SERVER" != "no"; then
              PKG_PROG_PKG_CONFIG()
       -      gtk3_found="no"
       -      if test "$USE_GTK3" = "yes" ; then
       -        PKG_CHECK_MODULES([GTK], [gtk+-3.0], gtk3_found="yes", gtk3_found="no")
       -        if test "$gtk3_found" = "yes" ; then
       -          # We use GtkTable a lot so don't clutter the compiler output with
       -          # recommendations to use GtkGrid instead
       -          CPPFLAGS="$CPPFLAGS -DGDK_DISABLE_DEPRECATION_WARNINGS"
       -        fi
       +      gtk4_found="no"
       +      if test "$USE_GTK4" = "yes" ; then
       +        PKG_CHECK_MODULES([GTK], [gtk4], gtk4_found="yes", gtk4_found="no")
              fi
       -      if test "$gtk3_found" = "no" ; then
       -        AM_PATH_GTK_2_0(2.0.0,gtk2_found="yes",gtk2_found="no")
       -        if test "$gtk2_found" = "no" ; then
       -          if test "$GUI_CLIENT" = "yes" -o "$GUI_SERVER" = "yes" ; then
       -             AC_MSG_ERROR(Cannot find GTK+)
       -          else
       -             AC_MSG_WARN(Cannot find GTK+; not building GUI client or server)
       -             GUI_CLIENT="no"
       -             GUI_SERVER="no"
       +      if test "$gtk4_found" = "no" ; then
       +        gtk3_found="no"
       +        if test "$USE_GTK3" = "yes" ; then
       +          PKG_CHECK_MODULES([GTK], [gtk+-3.0], gtk3_found="yes", gtk3_found="no")
       +          if test "$gtk3_found" = "yes" ; then
       +            # We use GtkTable a lot so don't clutter the compiler output with
       +            # recommendations to use GtkGrid instead
       +            CPPFLAGS="$CPPFLAGS -DGDK_DISABLE_DEPRECATION_WARNINGS"
       +          fi
       +        fi
       +        if test "$gtk3_found" = "no" ; then
       +          AM_PATH_GTK_2_0(2.0.0,gtk2_found="yes",gtk2_found="no")
       +          if test "$gtk2_found" = "no" ; then
       +            if test "$GUI_CLIENT" = "yes" -o "$GUI_SERVER" = "yes" ; then
       +               AC_MSG_ERROR(Cannot find GTK+)
       +            else
       +               AC_MSG_WARN(Cannot find GTK+; not building GUI client or server)
       +               GUI_CLIENT="no"
       +               GUI_SERVER="no"
       +            fi
                  fi
                fi
              fi