pua_json: better detection of paths for json-c library

src/modules/pua_json/Makefile

@@ -8,9 +8,28 @@ include ../../Makefile.defs
 
 auto_gen=
 NAME=pua_json.so
+LIBS=
+JLIB=json
 
-LIBS=-ljson-c
-DEFS+=-I$(LOCALBASE)/include -I/usr/local/include $(shell pkg-config --cflags json-c)
+BUILDER = $(shell which pkg-config)
+ifeq ($(BUILDER),)
+	JSONC=$(shell ls $(SYSBASE)/include/lib/libjson*.so $(LOCALBASE)/lib/libjson*.so 2>/dev/null | grep json-c)
+else
+	JSONC=$(shell pkg-config --libs json-c 2>/dev/null | grep json-c)
+endif
+
+ifneq ($(JSONC),)
+	JLIB=json-c
+endif
+
+ifeq ($(BUILDER),)
+	DEFS+=-I/usr/include/$(JLIB) -I$(LOCALBASE)/include/$(JLIB) \
+       -I$(LOCALBASE)/include
+	LIBS+=-L$(SYSBASE)/include/lib -L$(LOCALBASE)/lib -l$(JLIB)
+else
+	DEFS+= $(shell pkg-config --cflags $(JLIB))
+	LIBS+= $(shell pkg-config --libs $(JLIB))
+endif
 
 DEFS+=-DKAMAILIO_MOD_INTERFACE