http_async_client: use pkg-config for libevent compile flags detection

- re-enable pkg-config for libcurl

(cherry picked from commit 88d8aabb748d2c0ab476cea9a4a17eb990b618f7)

modules/http_async_client/Makefile

@@ -5,24 +5,42 @@ include ../../Makefile.defs
 auto_gen=
 NAME=http_async_client.so
 
-#ifeq ($(CROSS_COMPILE),)
-#CURL_BUILDER=$(shell \
-#	if pkg-config --exists libcurl; then \
-#		echo 'pkg-config libcurl'; \
-#	else \
-#		which curl-config; \
-#	fi)
-#endif
+ifeq ($(CROSS_COMPILE),)
+CURL_BUILDER=$(shell \
+	if pkg-config --exists libcurl; then \
+		echo 'pkg-config libcurl'; \
+	else \
+		which curl-config; \
+	fi)
+endif
 
 
 ifneq ($(CURL_BUILDER),)
-	DEFS += $(shell $(CURL_BUILDER) --cflags)
-	LIBS += $(shell $(CURL_BUILDER) --libs)
-else	
-	DEFS+=-I$(LOCALBASE)/include -I$(SYSBASE)/include
-	LIBS+=-L$(LOCALBASE)/lib -L$(SYSBASE)/lib -lcurl -levent
+	CURLDEFS += $(shell $(CURL_BUILDER) --cflags)
+	CURLLIBS += $(shell $(CURL_BUILDER) --libs)
+else
+	CURLDEFS+=-I$(LOCALBASE)/include -I$(SYSBASE)/include
+	CURLLIBS+=-L$(LOCALBASE)/lib -L$(SYSBASE)/lib -lcurl -levent
+endif
+
+ifeq ($(CROSS_COMPILE),)
+LEVENT_BUILDER = $(shell \
+	if pkg-config --exists libevent; then \
+		echo 'pkg-config libevent'; \
+	fi)
 endif
 
+ifeq ($(LEVENT_BUILDER),)
+	LEVENTDEFS=-I$(LOCALBASE)/include -I$(SYSBASE)/include
+	LEVENTLIBS=-L$(LOCALBASE)/lib -levent
+else
+	LEVENTDEFS = $(shell $(LEVENT_BUILDER) --cflags)
+	LEVENTLIBS = $(shell $(LEVENT_BUILDER) --libs)
+endif
+
+DEFS+=$(CURLDEFS) $(LEVENTDEFS)
+LIBS=$(CURLLIBS) $(LEVENTLIBS)
+
 DEFS+=-DKAMAILIO_MOD_INTERFACE
 
 SERLIBPATH=../../lib