We have build errors, seems related to JDK-8354415 :

=== Output from failing command(s) repeated here ===
* For target support_native_java.desktop_libawt_xawt_awt_GraphicsEnv.o:
/priv/jenkins/client-home/workspace/openjdk-jdk-aix_ppc64-opt/jdk/src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c:1751:43: error: unknown type name 'XRRModeInfo'
1751 | static jint refreshRateFromModeInfo(const XRRModeInfo *modeInfo) {
      | ^
/priv/jenkins/client-home/workspace/openjdk-jdk-aix_ppc64-opt/jdk/src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c:1758:31: error: use of undeclared identifier 'RR_Interlace'
1758 | if (modeInfo->modeFlags & RR_Interlace) {
      | ^
/priv/jenkins/client-home/workspace/openjdk-jdk-aix_ppc64-opt/jdk/src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c:1762:31: error: use of undeclared identifier 'RR_DoubleScan'
1762 | if (modeInfo->modeFlags & RR_DoubleScan) {
      | ^
/priv/jenkins/client-home/workspace/openjdk-jdk-aix_ppc64-opt/jdk/src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c:1769:43: error: unknown type name 'XRRCrtcInfo'
1769 | static inline Bool isLandscapeOrientation(XRRCrtcInfo* info) {
      | ^
/priv/jenkins/client-home/workspace/openjdk-jdk-aix_ppc64-opt/jdk/src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c:1773:30: error: use of undeclared identifier 'RR_Rotate_0'
1773 | return info->rotation == RR_Rotate_0 || info->rotation == RR_Rotate_180;
      | ^
   ... (rest of output omitted)