🚀 go-pugleaf

On Mon, 31 Jan 2005 12:32:25 +0800 "Dennis" <rwlin@avamax.com> wrote:
> Hello all,
>
>     I have several utilities sharing one makefile with common linking flags. 
> For example,
>
>             LFLAGS= -lpthread -lm -ljpeg
>
>            (BINPATH)%: %.c
>                            $(CC) $(CFLAGS) $(INCLUDE) -o $@ $< -L$(LIBPATH) 
> $(LFLAGS)
>
>     The executable is always linked with the 3 shared libraries even if they 
> are not necessary which produces the runtime loading error. Is it possible 
> for ld smart enough to check the real dependency and linked with them only?

As Paul said, your best bet is to write a correct Makefile.

Failing that, Solaris' ld supports '-z ignore' and '-z record'.

     -z ignore | record
           Ignores, or records, dynamic dependencies that are not
           referenced  as  part  of  the  link-edit.  Ignores, or
           records, unreferenced ELF sections from  the  relocat-
           able  objects  input  as  part  of  the  link-edit. By
           default, -z record is in effect.

           An ELF section will be ignored, and hence  eliminated,
           from the output file being generated if it contributes
           to an allocatable segment, if it  provides  no  global
           symbols,  and if no other section from any object that
           contributes to the link-edit makes reference to it.

GNU ld does not have this feature.  I don't know about other ld's.

/fc