Hi Mohammad, The --gc-sections remove unwanted section. But I think it is implemented only for ELF for some targets. For hms it does not work. Try with h8300-elf-ld. Regards, Anita Kulkarni
----- Original Message ----- From: Mohammad Saleem <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Sunday, November 18, 2001 5:25 PM Subject: Re: linking application with a library > Hi David, > > Thanks for your input. > > I tried with the flags you mentioned in your mail like: > > # how to compile C source > %.o: %.c > @echo compiling $< > $(CC) -ffunction-sections -fdata-sections $(CFLAGS) $(INCLUDE) $< > -o $@ > > Even with link I tried with a flag --gc-sections (found by searching in > mail archives) like: > > test.srec: $(OBJ) appcon.o > $(LD) --gc-sections $(LDFLAGS) $^ mylib.a $(LIBS) -o $@ > > > > But still I get the same size of srec as before, i.e my application is > increased by the size of mylib.a even without any function call from > mylib.a, along with a number of warnings like: > > ******************************************** > compiling appcon.c > h8300-hitachi-hms-ld: warning: no memory region specified for section > `._init' > h8300-hitachi-hms-ld: warning: no memory region specified for section > `.configu' > h8300-hitachi-hms-ld: warning: no memory region specified for section > `.timerIn' > ************************************************* > > What am I doing something wrong? > > regards > > /Mohammad > > > > David Korn wrote: > > >>-----Original Message----- > >>From: Mohammad Saleem [mailto:[EMAIL PROTECTED]] > >>Sent: 18 November 2001 10:36 > >> > > > > > >>I have a lib mylib.a (20 kb) which I want to link with my application. > >>My application gets 20 kb bigger as soon as I link it with mylib.a > >>without any function being called from mylib.a. > >>It seems to me that I have built mylib.a so that the whole lib > >>is linked > >>during linking process even if no one method is being called. > >>Now my question is which flag should I use to build mylib.a so > >>that only > >>those functions are linked which are being called. > >>If no function is called then linking mylib.a shouldn't affect > >>the size > >>of my application. > >> > > > > Alas, the linker is fairly dumb, and can only include or exclude parts > >of a lib file on the basis of the section name (.text, .data or .bss). > > > > Fortunately the compiler is fairly smart, and has an option > >-ffunction-sections that puts every function in a different section. This > >should supposedly do the job you wish. > > > > DaveK > > > > > > > ------ > Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ > Want to unsubscribe? Send a note to [EMAIL PROTECTED] > -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
