| diff --git a/configure.ac b/configure.ac | |
| index 0c23831..b851e96 100644 | |
| --- a/configure.ac | |
| +++ b/configure.ac | |
| @@ -150,7 +150,7 @@ AC_CHECK_DECL([__amd64], [AMD64_ABI="yes"], [AMD64_ABI="no"]) | |
| # if we're using Sun Studio and neither the user nor a config.site | |
| # has set CFLAGS. | |
| if test $SUNCC = yes && \ | |
| - test "$test_CFLAGS" == "" && \ | |
| + test "x$test_CFLAGS" = "x" && \ | |
| test "$CFLAGS" = "-g" | |
| then | |
| CFLAGS="-O -g" |