Avoid referencing Z_DEFAULT_COMPRESSION outside HAVE_LIBZ.

Because that's bad.

Discussion: http://postgr.es/m/20220127174545.GV23027@telsasoft.com

diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index 851f03ca81a73c8b81b0f3ee63b0231e874883d8..c351084db31e1f9e6e321ee0e3a568d96d811886 100644 (file)
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -1919,7 +1919,7 @@ BaseBackup(void)
        }
        AppendStringCommandOption(&buf, use_new_option_syntax,
                                  "COMPRESSION", compressmethodstr);
-       if (compresslevel != 0 && compresslevel != Z_DEFAULT_COMPRESSION)
+       if (compresslevel >= 1) /* not 0 or Z_DEFAULT_COMPRESSION */
            AppendIntegerCommandOption(&buf, use_new_option_syntax,
                                       "COMPRESSION_LEVEL", compresslevel);
    }