some delegates require C++

configure

@@ -5137,7 +5137,7 @@ MAGICK_PATCHLEVEL_VERSION=0
 
 MAGICK_VERSION=6.9.13-0
 
-MAGICK_GIT_REVISION=0da597543:20231122
+MAGICK_GIT_REVISION=e172d00e1:20231122
 
 
 # Substitute library versioning
@@ -36775,6 +36775,47 @@ fi
 
 
 
+#
+# Need C++ for { FPX, JXL}.
+#
+if test "$have_jxl" != 'no' || test "$with_fpx" != 'no'; then
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -x option" >&5
+printf %s "checking whether the compiler supports -x option... " >&6; }
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+
+      #include <stdio.h>
+
+int
+main (void)
+{
+
+      int main() {
+        return 0;
+      }
+
+  ;
+  return 0;
+}
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+    CFLAGS="$CFLAGS -x c++"
+
+else $as_nop
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
 #
 # Handle case where user doesn't want frozen paths
 #

configure.ac

@@ -3370,6 +3370,28 @@ AC_SUBST([windows_font_dir])
 
 AC_SUBST([type_include_files])
 
+# 
+# Need C++ for { FPX, JXL}.
+# 
+if test "$have_jxl" != 'no' || test "$with_fpx" != 'no'; then
+  AC_MSG_CHECKING([whether the compiler supports -x option])
+  AC_COMPILE_IFELSE([
+    AC_LANG_PROGRAM([
+      #include <stdio.h>
+    ],
+    [
+      int main() {
+        return 0;
+      }
+    ])
+  ], [
+    AC_MSG_RESULT([yes])
+    CFLAGS="$CFLAGS -x c++"
+  ], [
+    AC_MSG_RESULT([no])
+  ])
+fi
+
 #
 # Handle case where user doesn't want frozen paths
 #