c++ - How to export directly in a Makefile? -


i want export directly in makefile did rule 1 :

export: export ld_library_path=./smthing/here

and call rule in $(name)

$(name): $(objs)         $(cxx) -o $(name) $(objs) $(cxxflags) $(ldflags)         $(export)

$(objs) simple rule convert .cpp .o.

$(cxxflags) compiling flags : -wall -werror -wextra

and on $(ldflags) got point..

the problem here export rule done didn't exported expected. why ? can me ?

i got if don't export hand in terminal :

./cutom_prog: error while loading shared libraries: custom_lib.so: cannot open shared object file: no such file or directory

if want handle exporting makefile, try:

$(name): $(objs)         @export my_env_var=my_value; \         $(cxx) -o $(name) $(objs) $(cxxflags) $(ldflags)

exporting work if called in same subshell command itself.

however, solution not going work ld_library_path, because intention update parent process make, not possible.

the workaround create wrapper script would:

  • build application calling make
  • set ld_library_path
  • launch application

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