Disable deprecation warning in GTK at github validataion

Author: laeubi

.github/workflows/maven.yml

@@ -60,6 +60,8 @@ jobs:
       with:
         maven-version: 3.9.9
     - name: Build
+      env:
+        GTK_XCFLAGS: '-Wno-deprecated-declarations'
       run: >-
         ${{ contains(matrix.config.native, 'linux') && 'xvfb-run' || '' }}
         mvn --batch-mode -V -U -e

bundles/org.eclipse.swt/Eclipse SWT PI/gtk/library/build.sh

@@ -74,7 +74,7 @@ cd `dirname $0`
 
 MAKE_TYPE=make
 
-export CFLAGS='-O -Wall -fPIC'
+export CFLAGS="-O -Wall -fPIC ${GTK_XCFLAGS}"
 
 # Determine which OS we are on
 if [ "${OS}" = "" ]; then