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Do I need to rebuild the compiler with those options, or just use them when building my project? Thanks Chris Jonathan Larmour wrote: > Christopher Bahns wrote: > > > > Do you suppose this is why I'm having my size problems? I had some posts a few days ago about the 14% increase in my program's size when going from > > Microtec Research's (MRI) M68K compiler to GNU's. This increase put me over the limit in my flash memory and now we may have to do something funky to get > > the program to work under GNU. Maybe in the end the size increase with GNU will actually prevent us from converting over to it, which would be a bit > > unfortunate. > > > > I don't know if I'm pulling in unused functions from object files that have at least one function that I am using, but now I suspect I might be (perhaps > > MRI's engineers just did a better job of optimizing their code.....). > > GNU does support removal of unused functions. Compile with > -ffunction-sections -fdata-sections (and with g++ also -fvtable-gc). And > then invoke GNU ld with --gc-sections. If using gcc to invoke the linker > (as you should be) this is done by using -Wl,--gc-sections on the link > line. > > This only works for statically linked executables, but the size saving can > be considerable. > > Jifl > -- > Red Hat, 35 Cambridge Place, Cambridge, UK. CB2 1NS Tel: +44 (1223) 728762 > "Plan to be spontaneous tomorrow." || These opinions are all my own fault > > ------ > Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ > Want to unsubscribe? Send a note to crossgcc-unsubscribe@sourceware.cygnus.com
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