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Merge commit '39683d8eb7' into sync_cg_gcc-2022-03-26

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bjorn3 2022-03-26 18:29:37 +01:00
commit bbff48e094
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10
compiler/rustc_codegen_gcc/Readme.md
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@ -21,6 +21,8 @@ You can also use my [fork of gcc](https://github.com/antoyo/gcc) which already i
```bash
$ git clone https://github.com/rust-lang/rustc_codegen_gcc.git
$ cd rustc_codegen_gcc
$ git clone https://github.com/llvm/llvm-project llvm --depth 1 --single-branch
$ export RUST_COMPILER_RT_ROOT="$PWD/llvm/compiler-rt"
$ ./prepare_build.sh # download and patch sysroot src
$ ./build.sh --release
```
@ -109,6 +111,13 @@ Or add a breakpoint to `add_error` in gdb and print the line number using:
```
p loc->m_line
p loc->m_filename->m_buffer
```
To print a debug representation of a tree:
```c
debug_tree(expr);
```
To get the `rustc` command to run in `gdb`, add the `--verbose` flag to `cargo build`.
@ -134,4 +143,5 @@ To get the `rustc` command to run in `gdb`, add the `--verbose` flag to `cargo b
* Set `linker='-Clinker=m68k-linux-gcc'`.
* Set the path to the cross-compiling libgccjit in `gcc_path`.
* Disable the 128-bit integer types if the target doesn't support them by using `let i128_type = context.new_type::<i64>();` in `context.rs` (same for u128_type).
* Comment the line: `context.add_command_line_option("-masm=intel");` in src/base.rs.
* (might not be necessary) Disable the compilation of libstd.so (and possibly libcore.so?).