And what if I don't want quad precision? I mean, when I try to print a float, vfprintf casts the float to a double (and that's ok), but it seems like musl uses double as long double, so it tries to cast the double to long double. Is it true? Can I use a double (or float) as a double precision instead of quad precision? Il giorno mer 16 feb 2022 alle ore 15:57 Rich Felker ha scritto: > On Wed, Feb 16, 2022 at 12:59:13PM +0100, SIMONE MIONE wrote: > > Thank you all for your reply. > > I meant when I add musl's lib*.a into my makefile, the compiler complains > > about "undefined reference to __addtf3" (and others). Isn't that > > soft-float? Or emulation float? > > It's the implementation of long double which is IEEE quad in the > aarch64 ABI. > > > My supervisor told me "we already have float implementation so we don't > > need those functions". So I was wondering if I need to disable it in some > > way. > > No, you need them because there is no fpu implementation of quad. > > > > Il giorno mer 16 feb 2022 alle ore 12:32 Jeffrey Walton < > noloader@gmail.com> > > ha scritto: > > > > > On Wed, Feb 16, 2022 at 6:29 AM Szabolcs Nagy wrote: > > > > > > > > * Jeffrey Walton [2022-02-16 05:24:48 -0500]: > > > > > On Wed, Feb 16, 2022 at 4:51 AM SIMONE MIONE < > > > 205212@studenti.unimore.it> wrote: > > > > > > > > > > > > I am trying to integrate musl in a baremetal environment. I > already > > > have float support but I can't manage to disable soft-float by musl. > > > > > > > > > > > > I configure with: > > > > > > ./configure --target=aarch64-none-elf --enable-debug > --disable-shared > > > > > > And simple compile with: > > > > > > make > > > > > > > > > > > > Does anyone know how to use hardfloat instead of soft float? Is > > > there any option or flag? Thank you > > > > > > > > > > The GCC options for hard-floats are -mfpu=neon -mfloat-abi=hard. In > > > > > later versions of GCC, you can also use -mfpu=auto (sometimes). > > > > > > > > that's for 32bit arm > > > > > > > > there is no soft float abi for aarch64, so i'm not sure what's going > on. > > > > > > Oh, you're right My bad. I did not notice it was Aarch64. > > > > > > Jeff > > > >