c++ - Writing dependencies in makefile, with makefile -


based on questions -- , further reference found --, i'm trying build makefile able to:

  • find, given directories in $(src), .cpp files compiled;
  • compile .cpp, producing .o objects;
  • generate .so shared objects each .o formerly compiled.

what make file supposed achieve is:

  • find, given directories in $(src), .cpp files compiled;
  • build dependency list each .cpp using -mm compiler's flag;
  • annotate/add each dependency using $(eval ...);
  • evaluate/solve each dependency found, producing both .o , .so files.

what have far: i've been able quite whole thing, except making work (: error i'm getting states there is, somehow, empty label '' dependency:

$ make make: * no rule make target ', needed /home/rubens/bin/label.o'. stop.

so, here makefile i'm yet not able run:

# directories src := process init bin := $(home)/bin  lib := watershed libpath := $(watershed)/lib inc := $(watershed)/include $(xerces)/include  # paths mpicpp := mpic++ sources := $(shell find $(src) -name '*.cpp') objects := $(addprefix $(bin)/, $(notdir $(sources:.cpp=.o))) shared := $(objects:.o=.so)  # flags  cflags := -std=c++0x -o2 -wall -fpic cflags += $(foreach inc, $(inc), -i $(inc)) lflags := lflags += $(foreach lib, $(lib), -l $(lib)) lflags += $(foreach path, $(libpath), -l $(lib))  # rules $(shared): | bindir %.o:         @echo $@ -- [$<][$^][$*]         @echo $(mpicpp) $(cflags) -c $< -o $@  %.so: %.o         @echo $(mpicpp) $(lflags) -shared $< -o $@  bindir:         @mkdir -p $(bin)  # utilities .phony: clean all: $(shared) clean:         @rm -f $(objects) $(shared)  # dependencies define dependencies $(addprefix $(bin)/, $(notdir $(1:.cpp=.o))): \         $(shell $(mpicpp) $(cflags) -mm $(1) | sed 's/^.*\.o:[ ]*//') endef $(foreach src, $(sources), $(eval $(call dependencies, $(src))))

where seems error: seems caused dependency generation step, as, when remove empty lines , piping output grep, follows:

define dependencies $(addprefix $(bin)/, $(notdir $(1:.cpp=.o))): \         $(shell $(mpicpp) $(cflags) -mm $(1) | sed 's/^.*\.o:[ ]*//' | \         grep -v ^$) endef

the error somehow digivolves empty list of dependencies; i'm able see list empty echo's in rule %.o: -- variables not empty $@ , $*.

/home/rubens/bin/label.o -- [][][/home/rubens/bin/label]

mpic++ -std=c++0x -o2 -wall -fpic -i /home/rubens/libwatershed/include -i /home/rubens/xerces-c-3.1.1/include -c -o /home/rubens/bin/label.o

mpic++ -l watershed -l -shared /home/rubens/bin/label.o -o /home/rubens/bin/label.so

any advice on better ways solve very, welcome; yet, finish writing makefile, before use cmake or scons.

-mm generate dependencies on makefile format simplify generating dependencies each .cpp same file, doing "-include $(deps_file)". that's more maintainable using eval.


Comments

Post a Comment

Popular posts from this blog

php - Why I am getting the Error "Commands out of sync; you can't run this command now" -

the documentation of error mentioned in title says if commands out of sync; can't run command now in client code, calling client functions in wrong order. this can happen, example, if using mysql_use_result() , try execute new query before have called mysql_free_result(). can happen if try execute 2 queries return data without calling mysql_use_result() or mysql_store_result() in between. from here: http://dev.mysql.com/doc/refman/5.0/en/commands-out-of-sync.html but in first query not fetching data mysql database, inserting. , in second query getting data database. here code $connection = mysqli_connect("localhost","username","password","tbl_msgs"); if(mysqli_connect_errno($connection)) { die("failed connect mysql: " . mysqli_connect_error()); } $query = "insert users (total_comments, total_views) values ({$total_comments}, {$total_views});"; $query .= "insert msgs (no...
Read more

linux - Does gcc have any options to add version info in ELF binary file? -

i mean whether gcc can insert source code version infor elf binary section or similar. not want change source file, add info gcc option in makefile. you can emit version info text file, turn text file object file statically link executable. the first step simple have write code: script or write version info in format plain text file. write makefile rule produce version.o version.txt, using objcopy . you'll have object file 2 useful symbols defined in it: beginning , end of textual version info. add generated object executable, , you'll able access version 2 ways: running strings on binary, or writing code in application print version string (you'll need declare start , end symbols variables in header file).
Read more

java - Are there any classes that implement javax.persistence.Parameter<T>? -

i'm using named queries fetch entities database using jpa , hibernate , came across puzzling me: how come there no default implementations of javax.persistence.parameter interface? i rather impressed how @staticmetamodel used criteriabuilder in jpa2 meaning type safety , don't have mess around setting string names. wanted apply similar of jpa1 ejb's i'm working on: dealergroup_.class: public dealergroup_ { public parameter<integer> id = new parameterimpl<integer>("id"); /// etc... } dealergroupfacade.class: // ... public dealergroup fetch(integer id) { typedquery<dealergroup> query = em.createnamedquery("dealergroup.fetchbyid", dealergroup.class); query.setparameter(dealergroup_.id, query); return query.getsingleresult(); } // ... i surprised find there no implementations of parameter interface - of course, implement myself absence makes me suspicious may mistake using in way? should implementing parameter...
Read more