nosys.specs in newlib 2.2.0

[lange@chello.at]

> ---------- Ursprüngliche Nachricht ----------
> Von: "Bin.Cheng" <amker.cheng@gmail.com>
> An: "lange@chello.at" <lange@chello.at>
> Cc: "newlib@sourceware.org" <newlib@sourceware.org>
> Datum: 29. Januar 2015 um 03:13
> Betreff: Re: nosys.specs in newlib 2.2.0
>
> On Wed, Jan 28, 2015 at 2:46 AM, lange@chello.at <lange@chello.at> wrote:
> > Hello,
> >
> > I am trying to use the nosys.specs, but they appear to be adding a library
> > group
> > instead of replacing the default. This apparently means that some symbols
> > arent
> > resolved (_kill could not be resolved in one of my projects), I really cant
> > follow why.
> >
> > The target "link_gcc_c_sequence" is nothing gcc understands and it should be
> > lib
> > instead. I suppose the simple solution of renaming it wouldnt work together
> > with
> > nano.specs.
> >
> > I get the following output for these commands (test.c consists of an empty
> > main
> > function):
> >
> > arm-none-eabi-gcc -O2 -v test.c
> > /prefix/libexec/gcc/arm-none-eabi/4.8.4/collect2 -X
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crti.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtbegin.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib/crt0.o
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib
> > /tmp/cclh9vw4.o
> > --start-group -lgcc -lc --end-group
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtend.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtn.o
> >
> > arm-none-eabi-gcc -O2 -v --specs=nosys.specs test.c
> > /prefix/libexec/gcc/arm-none-eabi/4.8.4/collect2 -X
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crti.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtbegin.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib/crt0.o
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib
> > /tmp/ccmPSRKU.o
> > --start-group -lgcc -lc --end-group --start-group -lgcc -lc -lnosys
> > --end-group
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtend.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtn.o
> >
> > arm-none-eabi-gcc -O2 -g -v --specs=nosys.specs test.c
> > /prefix/libexec/gcc/arm-none-eabi/4.8.4/collect2 -X
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crti.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtbegin.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib/crt0.o
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4
> > -L/prefix/lib/gcc/arm-none-eabi/4.8.4/../../../../arm-none-eabi/lib
> > /tmp/ccVjsYCn.o
> > --start-group -lgcc -lg -lc --end-group --start-group -lgcc -lc -lnosys
> > --end-group
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtend.o
> > /prefix/lib/gcc/arm-none-eabi/4.8.4/crtn.o
> >
> >
> Hi lange,
> Sorry for the inconvenience, indeed I made that change for nano.specs.
> It's been sometime since I touched specs, so I don't yet understand
> the problem here. Do you mean the "-lg" added in the last command?
> It would be very helpful if I can have a simple case for this.
> I will find some time to play with nano.specs later.
>
> Thanks,
> bin

Hello,

the problem is, and I will refer to the output just as Example 1, 2, 3 for
better readability:

Example 1 is the reference

Example 2 should add -lnosys to the existing group.
Should: --start-group -lgcc -lc -lnosys --end-group
Is    : --start-group -lgcc -lc --end-group --start-group -lgcc -lc -lnosys
--end-group

Example 3 should do the same as Example 2, its just slightly more wrong by
linking 2 different c libraries
Should: --start-group -lgcc -lg -lnosys --end-group
Is    : --start-group -lgcc -lg -lc --end-group --start-group -lgcc -lc -lnosys
--end-group

You can easily reproduce this, just create test.c with
echo -> test.c "int main() {}"
If you fixed this, please also test if combination of "nano" and "nosys" works
correctly

The other thing might be something thats messed up by me, but the specs
certainly aint working as it should.

Kind Regards,
Norbert Lange