Detect and use abiflags during Python 3 detection

because these are used as part of the library name.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

acinclude.m4.in

@@ -4468,7 +4468,13 @@ else
   version="$1"
 fi
 
-AC_MSG_CHECKING([for Python$version])
+AC_PATH_PROG([PYTHON],[python$version])
+
+if test -n "$PYTHON"; then
+  abiflags=$($PYTHON -c 'import sys; print(sys.abiflags)')
+else
+  abiflags=""
+fi
 
 python_incdirs="$ac_python_dir/include /usr/include /usr/local/include/ $kde_extra_includes"
 AC_FIND_FILE(Python.h, $python_incdirs, python_incdir)
@@ -4484,13 +4490,13 @@ PYTHONINC=-I$python_incdir
 
 python_multiarch_libdirs="`find /usr/lib/ -maxdepth 1 -type d | xargs echo`"
 python_libdirs="$ac_python_dir/lib$tdelibsuff /usr/lib$tdelibsuff /usr/local /usr/lib$tdelibsuff $python_multiarch_libdirs $kde_extra_libs"
-AC_FIND_FILE(libpython$version.so, $python_libdirs, python_libdir)
-if test ! -r $python_libdir/libpython$version.so; then
-  AC_FIND_FILE(libpython$version.a, $python_libdirs, python_libdir)
-  if test ! -r $python_libdir/libpython$version.a; then
-    AC_FIND_FILE(python$version/config/libpython$version.a, $python_libdirs, python_libdir)
+AC_FIND_FILE(libpython$version$abiflags.so, $python_libdirs, python_libdir)
+if test ! -r $python_libdir/libpython$version$abiflags.so; then
+  AC_FIND_FILE(libpython$version$abiflags.a, $python_libdirs, python_libdir)
+  if test ! -r $python_libdir/libpython$version$abiflags.a; then
+    AC_FIND_FILE(python$version/config/libpython$version$abiflags.a, $python_libdirs, python_libdir)
     python_libdir=$python_libdir/python$version/config
-    if test ! -r $python_libdir/libpython$version.a; then
+    if test ! -r $python_libdir/libpython$version$abiflags.a; then
       python_libdir=no
     fi
   fi
@@ -4499,7 +4505,7 @@ fi
 PYTHONLIB=-L$python_libdir
 kde_orig_LIBPYTHON=$LIBPYTHON
 if test -z "$LIBPYTHON"; then
-  LIBPYTHON=-lpython$version
+  LIBPYTHON=-lpython$version$abiflags
 fi
 
 AC_FIND_FILE(python$version/copy.py, $python_libdirs, python_moddir)
@@ -4510,7 +4516,10 @@ fi
 
 PYTHONMODDIR=$python_moddir
 
-AC_MSG_RESULT(header $python_incdir library $python_libdir modules $python_moddir)
+AC_MSG_RESULT([\
+             header $python_incdir,
+             library $python_libdir,
+             modules $python_moddir])
 
 if test x$python_incdir = xno ||  test x$python_libdir = xno ||  test x$python_moddir = xno; then
    LIBPYTHON=$kde_orig_LIBPYTHON