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Many thanks to cnlohr for the nosdk8266 project:
https://github.com/cnlohr/nosdk8266
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This is only very minimal support. More support (such as tinygo flash,
or peripheral access) should be added in later commits, to keep this one
focused.
Importantly, this commit changes the LLVM repo from llvm/llvm-project to
tinygo-org/llvm-project. This provides a little bit of versioning in
case something changes in the Espressif fork. If we want to upgrade to
LLVM 11 it's easy to switch back to llvm/llvm-project until Espressif
has updated their fork.
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Several updates are necessary for LLVM 11 support, so simply update to
the latest commit.
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This is necessary for better CGo support on bare metal. Existing
libraries expect to be able to include parts of libc and expect to be
able to link to those symbols.
Because with this all targets have a working libc, it is now possible to
add tests to check that a libc in fact works basically.
Not all parts of picolibc are included, such as the math or stdio parts.
These should be added later, when needed.
This commit also avoids the need for the custom memcpy/memset/memcmp
symbols that are sometimes emitted by LLVM. The C library will take care
of that.
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This reverts back to the upstream repository which has merged all
necessary updates.
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This allows CGo code to call some libc functions. Additionally, by
putting memset/memmove/memcpy in an archive they're not included anymore
when not necessary, reducing code size for small programs.
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This reverts commit acdaaa17d8232989d310292a512e70fccdb288a5.
See https://github.com/tinygo-org/tinygo/issues/734 for details.
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We don't need the separate submodule: compiler-rt is already included in
the llvm-project repository.
This should hopefully make CI slightly faster too.
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Signed-off-by: Ron Evans <[email protected]>
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This page has been a big help in adding support for this new chip:
https://wiki.osdev.org/HiFive-1_Bare_Bones
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Signed-off-by: Ron Evans <[email protected]>
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These files don't really belong in this repository. It's better to
generate them automatically from a source, like the one provided by the
avr-rust project. So a new command `make gen-device-avr` has been
provided for this purpose.
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