extconf.rb in duckdb-0.3.2.0

- old
+ new
@@ -1,24 +1,33 @@
 require 'mkmf'
 
 dir_config('duckdb')
-if have_library('duckdb')
-  if have_func('duckdb_nparams(NULL)', 'duckdb.h')
-    $defs << '-DHAVE_DUCKDB_NPARAMS_029'
-  elsif have_func('duckdb_nparams(NULL, NULL)', 'duckdb.h')
-    $defs << '-DHAVE_DUCKDB_NPARAMS_028'
-  end
 
-  have_func('duckdb_value_blob', 'duckdb.h')
-  have_func('duckdb_bind_blob', 'duckdb.h')
-  have_func('duckdb_appender_create', 'duckdb.h')
-  have_func('duckdb_free', 'duckdb.h')
-  have_func('duckdb_create_config', 'duckdb.h')
-  have_func('duckdb_open_ext', 'duckdb.h')
-  have_func('duckdb_prepare_error', 'duckdb.h')
-  have_func('duckdb_append_date', 'duckdb.h')
-  have_func('duckdb_append_interval', 'duckdb.h')
-  have_func('duckdb_append_time', 'duckdb.h')
-  have_func('duckdb_append_timestamp', 'duckdb.h')
-  have_func('duckdb_append_hugeint', 'duckdb.h')
-  create_makefile('duckdb/duckdb_native')
+raise 'duckdb library is not found. Install duckdb library file and header file.' unless have_library('duckdb')
+
+raise 'duckdb >= 0.2.9 is required. Install duckdb >= 0.2.9' unless have_func('duckdb_value_is_null', 'duckdb.h')
+
+if have_func('duckdb_nparams(NULL)', 'duckdb.h')
+  $defs << '-DHAVE_DUCKDB_NPARAMS_029'
+elsif have_func('duckdb_nparams(NULL, NULL)', 'duckdb.h')
+  $defs << '-DHAVE_DUCKDB_NPARAMS_028'
 end
+
+have_func('duckdb_appender_create', 'duckdb.h')
+have_func('duckdb_free', 'duckdb.h')
+
+have_func('duckdb_create_config', 'duckdb.h')
+have_func('duckdb_open_ext', 'duckdb.h')
+have_func('duckdb_prepare_error', 'duckdb.h')
+
+have_func('duckdb_append_date', 'duckdb.h')
+have_func('duckdb_append_interval', 'duckdb.h')
+have_func('duckdb_append_time', 'duckdb.h')
+have_func('duckdb_append_timestamp', 'duckdb.h')
+have_func('duckdb_append_hugeint', 'duckdb.h')
+
+have_func('duckdb_bind_date', 'duckdb.h')
+have_func('duckdb_bind_time', 'duckdb.h')
+have_func('duckdb_bind_timestamp', 'duckdb.h')
+have_func('duckdb_bind_interval', 'duckdb.h')
+
+create_makefile('duckdb/duckdb_native')