add rudimentary location support

The function dbfp_query_location_name performs the location.name query
and returns a list of all stations that match the search term.  The
implementation has two flaws:  there is no URL encoding, and
malformatted query results will not lead to a meaningful error message.

There are two new test cases:  basic tests some basic functionality, as
setting the API key and accessing the API.  location adds a simple test
for the location.name query.

1 files changed, 6 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index 7b67ed2..e802cd4 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,8 @@ endif
 
 CHECK_CFLAGS = $(shell pkg-config check --cflags)
 CHECK_LDLIBS = $(shell pkg-config check --libs)
+CURL_LDLIBS = -lcurl
+EXPAT_LDLIBS = -lexpat
 
 .PHONY: all check clean
 
@@ -24,9 +26,11 @@ clean:
 	$(RM) dbfp_check
 	$(RM) dbfp.o dbfp_check.o
 
-libdbfp.so: LDFLAGS = -shared
+libdbfp.so: LDFLAGS += -shared
+libdbfp.so: LDLIBS += $(CURL_LDLIBS)
+libdbfp.so: LDLIBS += $(EXPAT_LDLIBS)
 libdbfp.so: dbfp.o
-	$(CC) $(LDFLAGS) -o $@ $^
+	$(CC) $(LDFLAGS) -o $@ $^ $(LDLIBS)
 
 dbfp_check: LDLIBS += $(CHECK_LDLIBS)
 dbfp_check: LDLIBS += -ldbfp -L.