uuid: detect if pkg-config knows about uuid lib

(cherry picked from commit 66fc01f)
(cherry picked from commit 21cb1bf)
(cherry picked from commit 0d40497)

modules/uuid/Makefile

@@ -6,12 +6,15 @@ auto_gen=
 NAME=uuid.so
 
 ifeq ($(CROSS_COMPILE),)
-	BUILDER = $(shell which pkg-config)
+BUILDER = $(shell \
+	if pkg-config --exists uuid; then \
+		echo 'pkg-config uuid'; \
+	fi)
 endif
 
 ifneq ($(BUILDER),)
-	DEFS += $(shell $(BUILDER) --cflags uuid)
-	LIBS += $(shell $(BUILDER) --libs uuid)
+	DEFS += $(shell $(BUILDER) --cflags)
+	LIBS += $(shell $(BUILDER) --libs)
 else
 	DEFS +=-I$(LOCALBASE)/include -I$(SYSBASE)/include
 	LIBS+=-L$(LOCALBASE)/lib -L$(SYSBASE)/lib -luuid