Re: error "This header is not available in freestand ing mode.”

Hi Dave,

You'll need to contact the folks behind circle-stdlib and circle-newlib.
I have no idea what circle-newlib is compared to newlib and whether the
steps you have taken are correct to build it.  I do
know that requires_hosted.h is not part of newlib so this is circle-newlib
specific.

If the maintainers there can pin-point some issue with sourceware newlib,
we'll be happy to look at it.

Regards,

-- Jeff J.

On Wed, Jul 24, 2024 at 3:27 PM David Filip <[email protected]> wrote:

> Hi newlib community!
>
> I have successfully built and are using Circle (46) on Linux (Rocky/CentOS
> 8) using the toolchain 3.2:
>
> $ aarch64-none-elf-g++ --version
>
> aarch64-none-elf-g++ (Arm GNU Toolchain 13.2.rel1 (Build arm-13.7)) 13.2.1
> 20231009
>
> Copyright (C) 2023 Free Software Foundation, Inc.
>
>
> However, I am having problems building any of the samples, and receive the
> error:
>
>
> *requires_hosted.h:34:4:* *error: *#error "This header is not available
> in freestanding mode.”
>
>
> To build my environment, I have downloaded stdlib from:
>
>
> https://github.com/smuehlst/circle-stdlib.git
>
>
> I then I installed and built Circle under:
>
>
> circle-stdlib/libs/circle
>
>
> And then newlib under circle-stdlib/libs/std-newlib:
>
>
> $ git clone https://github.com/smuehlst/circle-newlib.git
>
>
> And under mbedtls under circle-stdlib/libs/mbedtls:
>
>
> $ git clone https://github.com/Mbed-TLS/mbedtls.git
>
>
> And then finally, under circle-stdlib:
>
>
> $ ./configure --raspberrypi e3 --prefix aarch64-none-elf- --opt-tls
>
> $ make
>
>
> Which seems to successfully build everything with no errors.  However, if
> I try to build any of the samples under:
>
>
> circle-stdlib/samples:
>
> I receive a ton of errors, starting with a bunch of:
>
> * requires_hosted.h:34:4:* *error: *#error "This header is not available
> in freestanding mode.”
>
>
> So my questions re:
>
>
> 1) Did I build the environment correctly, based on the steps I’ve
> outlined, or am I off base?
>
>
> 2) Any idea why I am getting these errors, and how to fix them?
>
>
> I’ve included my build steps because it wasn’t initially clear (at least
> to me) how Circle + StdLib + NewLib all fit together, so let me know if
> I’ve made any bad assumptions, or if there is an easier way to integrate
> and build these components.
>
>
> However, doing ‘make’ does seem to build the libraries correctly, and it
> did build:
>
>
> $ find circle-stdlib/install
>
> install
>
> install/.gitignore
>
> install/aarch64-none-circle
>
> install/aarch64-none-circle/lib
>
> install/aarch64-none-circle/lib/libm.a
>
> install/aarch64-none-circle/lib/libc.a
>
> install/aarch64-none-circle/lib/libg.a
>
> install/aarch64-none-circle/lib/libcirclenewlib.a
>
> install/aarch64-none-circle/lib/libnosys.a
>
> install/aarch64-none-circle/lib/nosys.specs
>
> install/aarch64-none-circle/include => Lots of Include Files
>
>
> But none of the samples will build correctly.  The compiler seems to be
> complaining that I am building with —freestanding while still referencing
> the C/C++ standard libraries, although those libraries are now provided by
> newlib?
>
>
> Thanks in advance for any ideas or suggestions, and/or for clarifying any
> of my misconceptions about how all these pieces fit together.
>
>
> Regards,
>
>
> Dave Filip
>
>
>
>
>
>
>
>