1 files changed, 82 insertions, 0 deletions
diff --git a/m4/qt6.m4 b/m4/qt6.m4
new file mode 100644
index 00000000..6e864fb1
--- /dev/null
+++ b/m4/qt6.m4
@@ -0,0 +1,82 @@
+dnl qt6.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 Qt6
+dnl
+dnl sets GPGME_QT6_LIBS and GPGME_QT6_CFLAGS
+dnl
+dnl if QT6 was found have_qt6_libs is set to yes
+
+AC_DEFUN([FIND_QT6],
+[
+  have_qt6_libs="no";
+
+  PKG_CHECK_MODULES(GPGME_QT6,
+                    Qt6Core >= 6.4.0,
+                    [have_qt6_libs="yes"],
+                    [have_qt6_libs="no"])
+
+  PKG_CHECK_MODULES(GPGME_QT6TEST,
+                    Qt6Test >= 6.4.0,
+                    [have_qt6test_libs="yes"],
+                    [have_qt6test_libs="no"])
+
+  if ! test "$have_w32_system" = yes; then
+    if "$PKG_CONFIG" --variable qt_config Qt6Core | grep -q "reduce_relocations"; then
+      GPGME_QT6_CFLAGS="$GPGME_QT6_CFLAGS -fpic"
+    fi
+  fi
+  if test "$have_qt6_libs" = "yes"; then
+    # Qt6 moved moc to libexec
+    qt6libexecdir=$($PKG_CONFIG --variable=libexecdir 'Qt6Core >= 6.4.0')
+    AC_PATH_TOOL(MOC, moc, [], [$qt6libexecdir])
+    AC_MSG_CHECKING([moc version])
+    mocversion=`$MOC -v 2>&1`
+    mocversiongrep=`echo $mocversion | grep -E "Qt 6|moc 6"`
+    if test x"$mocversiongrep" != x"$mocversion"; then
+      AC_MSG_RESULT([no])
+      # moc was not the qt6 one, try with moc-qt6
+      AC_CHECK_TOOL(MOC2, moc-qt6)
+      mocversion=`$MOC2 -v 2>&1`
+      mocversiongrep=`echo $mocversion | grep -E "Qt 6|moc-qt6 6|moc 6"`
+      if test x"$mocversiongrep" != x"$mocversion"; then
+        AC_CHECK_TOOL(QTCHOOSER, qtchooser)
+        qt6tooldir=`QT_SELECT=qt6 qtchooser -print-env | grep QTTOOLDIR | cut -d '=' -f 2 | cut -d \" -f 2`
+        mocversion=`$qt6tooldir/moc -v 2>&1`
+        mocversiongrep=`echo $mocversion | grep -E "Qt 6|moc 6"`
+        if test x"$mocversiongrep" != x"$mocversion"; then
+          # no valid moc found
+          have_qt6_libs="no";
+        else
+          MOC=$qt6tooldir/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_QT6_CFLAGS
+    OLDLIBS=$LIBS
+    LIBS=$GPGME_QT6_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_qt6_libs='yes'], [have_qt6_libs='no'])
+    AC_MSG_RESULT([$have_qt6_libs])
+    AC_LANG_POP()
+    CPPFLAGS=$OLDCPPFLAGS
+    LIBS=$OLDLIBS
+  fi
+])