On 03/12/2020 21:24, Enrico Tabanelli wrote: > Hi Richard, > > Do you know how to hack the build system properly to exclude the > optimized routines? Sorry, not in detail. Most of the changes will probably be in libgcc/config/arm; but you may also need to make changes to gcc/config/arm/arm.c to handle the function names that are used when calling the soft-float C code. R. > > Enrico > ------------------------------------------------------------------------ > *From:* Richard Earnshaw <Richard.Earnshaw@xxxxxxxxxxxx> > *Sent:* Thursday, December 3, 2020 12:59 PM > *To:* Enrico Tabanelli <enrico.tabanelli3@xxxxxxxx>; > gcc-help@xxxxxxxxxxx <gcc-help@xxxxxxxxxxx> > *Subject:* Re: Builiding not optimized Libgcc for ARM Cortex-M4 target > > On 24/11/2020 20:47, Enrico Tabanelli via Gcc-help wrote: >> Good morning, >> >> I am trying to compile Libgcc for the ARM Cortex-M4 target from scratch since I need to compare Floating Point SW emulation on an ARM Cortex-M4 and Risc-V based processors. By default, GCC includes an optimized version of the FP SW emulation routines, ieee754-sf.S, which is included in the ARM back-end of Libgcc. For my work, I would > like to use the basic routines included in libgcc/softfp. >> Does anyone know how to exclude ieee754-sf.S in the libgcc building process? In particular, how to configure GCC and if there is something to change inside the ARM back-end? >> >> Thanks, >> Enrico Tabanelli >> > > I think you'd need to hack the build system. I'm not aware of any > standard configuration hooks to do this. > > R.
