added .cxx extension for C++ for completeness reasons

diff --git a/acinclude.m4 b/acinclude.m4
index a42edf661898dce6dd203b31adda9303ce2bdeed..82def04b9f22ec98ec9e17d3b4ac2935439cde55 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -258,7 +258,7 @@ dnl choose the right compiler/flags/etc. for the source-file
          *.c[)] ac_comp="$b_c_pre $3 $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $6$b_c_post" ;;
          *.s[)] ac_comp="$b_c_pre $3 $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $6$b_c_post" ;;
          *.S[)] ac_comp="$b_c_pre $3 $ac_inc $b_c_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $6$b_c_post" ;;
-         *.cpp|*.cc[)] ac_comp="$b_cxx_pre $3 $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $6$b_cxx_post" ;;
+         *.cpp|*.cc|*.cxx[)] ac_comp="$b_cxx_pre $3 $ac_inc $b_cxx_meta -c $ac_srcdir$ac_src -o $ac_bdir$ac_obj.$b_lo $6$b_cxx_post" ;;
       esac
 
 dnl create a rule for the object/source combo