Linux: Add script to build GTK3 based generic installer

src/Build/build_veracrypt_linux_gtk3.sh

@@ -0,0 +1,47 @@
+#
+# Copyright (c) 2013-2021 IDRIX
+# Governed by the Apache License 2.0 the full text of which is contained
+# in the file License.txt included in VeraCrypt binary and source
+# code distribution packages.
+#
+
+# Absolute path to this script
+SCRIPT=$(readlink -f "$0")
+# Absolute path this script is in
+SCRIPTPATH=$(dirname "$SCRIPT")
+# source directory which contains the Makefile
+SOURCEPATH=$(readlink -f "$SCRIPTPATH/..")
+# directory where the VeraCrypt has been checked out
+PARENTDIR=$(readlink -f "$SCRIPTPATH/../../..")
+
+# Make sure only root can run our script
+if [ "$(id -u)" != "0" ]; then
+   echo "VeraCrypt must be built by root" 1>&2
+   exit 1
+fi
+
+# the sources of wxWidgets 3.0.5 must be extracted to the parent directory
+export WX_ROOT=$PARENTDIR/wxWidgets-3.0.5
+echo "Using wxWidgets sources in $WX_ROOT"
+
+cd $SOURCEPATH
+
+echo "Building GUI version of VeraCrypt"
+
+# this will be the temporary wxWidgets directory
+export WX_BUILD_DIR=$PARENTDIR/wxBuildGui
+
+# make WXSTATIC=1 WITHGTK3=1 wxbuild && make WXSTATIC=1 clean && make WXSTATIC=1 && make WXSTATIC=1 package
+
+# Uncomment below and comment line above to reuse existing wxWidgets build
+make WXSTATIC=1 clean && make WXSTATIC=1 && make WXSTATIC=1 package
+
+echo "Building console version of VeraCrypt"
+
+# this will be the temporary wxWidgets directory
+export WX_BUILD_DIR=$PARENTDIR/wxBuildConsole
+
+#make WXSTATIC=1 WITHGTK3=1 NOGUI=1 wxbuild && make WXSTATIC=1 NOGUI=1 clean && make WXSTATIC=1 NOGUI=1 && make WXSTATIC=1 NOGUI=1 package
+
+# Uncomment below and comment line above to reuse existing wxWidgets build
+make WXSTATIC=1 NOGUI=1 clean && make WXSTATIC=1 NOGUI=1 && make WXSTATIC=1 NOGUI=1 package