Fixed path to pg_config

Author: Dmitry Vasilyev

Makefile

@@ -15,7 +15,7 @@ EXTRA_CLEAN = y.tab.c y.tab.h \
 				jsquery_gram.c jsquery_scan.c jsquery_gram.h
 
 ifdef USE_PGXS
-PG_CONFIG = pg_config
+PG_CONFIG ?= pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
 include $(PGXS)
 else

README.md

@@ -49,7 +49,7 @@ Before build and install you should ensure following:
    PostgreSQL from source.
  * You have flex and bison installed on your system. JsQuery was tested on
    flex 2.5.37-2.5.39, bison 2.7.12.
- * Your PATH variable is configured so that pg\_config command available.
+ * Your PATH variable is configured so that pg\_config command available, or set PG_CONFIG variable.
 
 Typical installation procedure may look like this: