Re: debugging eval,call,foreach....

[Toomas Rosin]

Hello!

   For example, the manual has this example:

        PROGRAMS= client server

        define PROGRAM_template
         $(1): $$($(1)_OBJ) $$($(1)_LIBS:%=-l%)
         ALL_OBJS   += $$($(1)_OBJS)
        endef

        $(foreach prog,$(PROGRAMS),$(eval $(call PROGRAM_template,$(prog))))

   it would be nice have a way to produce:

   client: $(client_OBJS)
   ALL_OBJS+=$(client_OBJS)
   server: $(server_OBJS)
   ALL_OBJS+=$(server_OBJS)

   to help verify that all the quoting/escaping in PROGRAM_template and the
   $( ...) stuff is right.

Use `warning'.

Makefile:

   PROGRAMS    = server client
   
   server_OBJS = server.o server_priv.o server_access.o
   server_LIBS = priv protocol
   
   client_OBJS = client.o client_api.o client_mem.o
   client_LIBS = protocol
   
   # Everything after this is generic
   
   .PHONY: all
   all: $(PROGRAMS)

   # Add newlines to make the results stand out more clearly in output   
   define PROGRAM_template
   
   
   $(1): $$($(1)_OBJ) $$($(1)_LIBS:%=-l%)
   ALL_OBJS   += $$($(1)_OBJS)
   
   endef
   
   # $(foreach prog,$(PROGRAMS),$(eval $(call PROGRAM_template,$(prog))))
   
   # Replace `eval' with `warning':
   $(foreach prog,$(PROGRAMS),$(warning $(call PROGRAM_template,$(prog))))
   
   $(PROGRAMS):
           @echo $(LINK.o) $^ $(LDLIBS) -o $@

Sample session:

   address@hidden:~ $ make
   Makefile:24:
   
   server: $(server_OBJ) $(server_LIBS:%=-l%)
   ALL_OBJS   += $(server_OBJS)
   
   Makefile:24:
   
   client: $(client_OBJ) $(client_LIBS:%=-l%)
   ALL_OBJS   += $(client_OBJS)
   
   cc -o server
   cc -o client
   address@hidden:~ $

Peace,
Toomas