don't try to build func_odbc when ODBC headers/libraries are not present

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@7589 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/Makefile

@@ -25,7 +25,13 @@ BUILTINS=func_md5.o \
          func_language.o \
          func_moh.o
 
-STANDALONE_FUNCS=$(filter-out $(BUILTINS),$(patsubst %.c,%.o,$(wildcard func*.c)))
+AVAILABLE_FUNCS=$(filter-out $(BUILTINS),$(patsubst %.c,%.o,$(wildcard func*.c)))
+
+ifeq ($(wildcard $(CROSS_COMPILE_TARGET)/usr/include/odbcinst.h)$(wildcard $(CROSS_COMPILE_TARGET)/usr/local/include/odbcinst.h),)
+  STANDALONE_FUNCS=$(filter-out func_odbc.o,$(AVAILABLE_FUNCS))
+else
+  STANDALONE_FUNCS=$(AVAILABLE_FUNCS)
+endif
 
 FUNCS+=$(STANDALONE_FUNCS:.o=.so)