diff -rupN grass-8.2.0/configure grass-8.2.0-new/configure
--- grass-8.2.0/configure	2023-01-16 20:04:03.407559870 +0100
+++ grass-8.2.0-new/configure	2023-01-16 20:07:17.445990464 +0100
@@ -9029,7 +9029,6 @@ fi
 
   if test "$PDAL_CONFIG" != "" ; then
     PDAL_LIBS=`"$PDAL_CONFIG" --libs`
-    PDAL_CPPFLAGS=`"$PDAL_CONFIG" --cxxflags`
     PDAL_INC=`"$PDAL_CONFIG" --includes`
     USE_PDAL=1
   fi
@@ -9037,10 +9036,8 @@ fi
   PDAL=
   ac_save_libs="$LIBS"
   ac_save_cflags="$CFLAGS"
-  ac_save_cppflags="$CPPFLAGS"
   LIBS="$LIBS $PDAL_LIBS"
   CFLAGS="$CFLAGS $PDAL_CFLAGS"
-  CPPFLAGS="$CPPFLAGS $PDAL_CPPFLAGS $PDAL_INC"
   ac_ext=cpp
 ac_cpp='$CXXCPP $CPPFLAGS'
 ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -9332,7 +9329,6 @@ rm -f core conftest.err conftest.$ac_obj
     conftest$ac_exeext conftest.$ac_ext
   LIBS=${ac_save_libs}
   CFLAGS=${ac_save_cflags}
-  CPPFLAGS=${ac_save_cppflags}
 
 
 $as_echo "#define HAVE_PDAL 1" >>confdefs.h
diff -rupN grass-8.2.0/configure.ac grass-8.2.0-new/configure.ac
--- grass-8.2.0/configure.ac	2023-01-16 20:04:03.407559870 +0100
+++ grass-8.2.0-new/configure.ac	2023-01-16 20:07:17.445990464 +0100
@@ -998,7 +998,6 @@ else
 
   if test "$PDAL_CONFIG" != "" ; then
     PDAL_LIBS=`"$PDAL_CONFIG" --libs`
-    PDAL_CPPFLAGS=`"$PDAL_CONFIG" --cxxflags`
     PDAL_INC=`"$PDAL_CONFIG" --includes`
     USE_PDAL=1
   fi
@@ -1006,10 +1005,8 @@ else
   PDAL=
   ac_save_libs="$LIBS"
   ac_save_cflags="$CFLAGS"
-  ac_save_cppflags="$CPPFLAGS"
   LIBS="$LIBS $PDAL_LIBS"
   CFLAGS="$CFLAGS $PDAL_CFLAGS"
-  CPPFLAGS="$CPPFLAGS $PDAL_CPPFLAGS $PDAL_INC"
   AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pdal/PointTable.hpp>
   #include <pdal/Streamable.hpp>
   class St:public pdal::Streamable {};]], [[pdal::PointTable table;]])],[],[
@@ -1021,7 +1018,6 @@ else
   ])
   LIBS=${ac_save_libs}
   CFLAGS=${ac_save_cflags}
-  CPPFLAGS=${ac_save_cppflags}
 
   AC_DEFINE(HAVE_PDAL, 1, [define if PDAL exists])
 fi