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Use a relative bindir for rustdoc to find rustc #66317
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    In bootstrap, we set `RUSTC_INSTALL_BINDIR` to `config.bindir`, so rustdoc can find rustc relative to the toolchain sysroot. However, if a distro script like Fedora's `%configure` sets an absolute path, then rustdoc's `sysroot.join(bin_path)` ignores that sysroot altogether. That would be OK once the toolchain is actually installed, but it breaks the in-tree doc tests during the build, since `/usr/bin/rustc` is still the old version. So now we try to make `RUSTC_INSTALL_BINDIR` relative to the sysroot prefix in the first place.
              
                    Mark-Simulacrum
  
              
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r=me with nit (unless you disagree, of course)
| @bors r+ | 
| 📌 Commit bfa5e5f has been approved by  | 
    
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…ulacrum Use a relative bindir for rustdoc to find rustc In bootstrap, we set `RUSTC_INSTALL_BINDIR` to `config.bindir`, so rustdoc can find rustc relative to the toolchain sysroot. However, if a distro script like Fedora's `%configure` sets an absolute path, then rustdoc's `sysroot.join(bin_path)` ignores that sysroot altogether. That would be OK once the toolchain is actually installed, but it breaks the in-tree doc tests during the build, since `/usr/bin/rustc` is still the old version. So now we try to make `RUSTC_INSTALL_BINDIR` relative to the sysroot prefix in the first place. r? @Mark-Simulacrum
    
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Rollup of 13 pull requests Successful merges: - #65932 (download .tar.xz if python3 is used) - #66074 ([mir-opt] Turn on the `ConstProp` pass by default) - #66094 (Fix documentation for `Iterator::count()`.) - #66166 (rename cfg(rustdoc) into cfg(doc)) - #66227 (docs: Fix link to BufWriter::flush) - #66292 (add Result::map_or) - #66297 (Add a callback that allows compiler consumers to override queries.) - #66317 (Use a relative bindir for rustdoc to find rustc) - #66330 (Improve non-exhaustiveness handling in usefulness checking) - #66331 (Add some tests for fixed ICEs) - #66334 (Move Session fields to CrateStore) - #66335 (Move self-profile infrastructure to data structures) - #66337 (Remove dead code for encoding/decoding lint IDs) Failed merges: r? @ghost
    
  JohnTitor 
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      Nov 13, 2019 
    
    
      
  
    
      
    
  
…ulacrum Use a relative bindir for rustdoc to find rustc In bootstrap, we set `RUSTC_INSTALL_BINDIR` to `config.bindir`, so rustdoc can find rustc relative to the toolchain sysroot. However, if a distro script like Fedora's `%configure` sets an absolute path, then rustdoc's `sysroot.join(bin_path)` ignores that sysroot altogether. That would be OK once the toolchain is actually installed, but it breaks the in-tree doc tests during the build, since `/usr/bin/rustc` is still the old version. So now we try to make `RUSTC_INSTALL_BINDIR` relative to the sysroot prefix in the first place. r? @Mark-Simulacrum
    
  JohnTitor 
      added a commit
        to JohnTitor/rust
      that referenced
      this pull request
    
      Nov 13, 2019 
    
    
      
  
    
      
    
  
…ulacrum Use a relative bindir for rustdoc to find rustc In bootstrap, we set `RUSTC_INSTALL_BINDIR` to `config.bindir`, so rustdoc can find rustc relative to the toolchain sysroot. However, if a distro script like Fedora's `%configure` sets an absolute path, then rustdoc's `sysroot.join(bin_path)` ignores that sysroot altogether. That would be OK once the toolchain is actually installed, but it breaks the in-tree doc tests during the build, since `/usr/bin/rustc` is still the old version. So now we try to make `RUSTC_INSTALL_BINDIR` relative to the sysroot prefix in the first place. r? @Mark-Simulacrum
    
  bors 
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      that referenced
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      Nov 13, 2019 
    
    
      
  
    
      
    
  
Rollup of 14 pull requests Successful merges: - #65932 (download .tar.xz if python3 is used) - #66094 (Fix documentation for `Iterator::count()`.) - #66166 (rename cfg(rustdoc) into cfg(doc)) - #66186 (Add long error explanation for E0623) - #66227 (docs: Fix link to BufWriter::flush) - #66248 (add raw ptr variant of UnsafeCell::get) - #66292 (add Result::map_or) - #66297 (Add a callback that allows compiler consumers to override queries.) - #66317 (Use a relative bindir for rustdoc to find rustc) - #66330 (Improve non-exhaustiveness handling in usefulness checking) - #66331 (Add some tests for fixed ICEs) - #66334 (Move Session fields to CrateStore) - #66335 (Move self-profile infrastructure to data structures) - #66337 (Remove dead code for encoding/decoding lint IDs) Failed merges: r? @ghost
  
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In bootstrap, we set
RUSTC_INSTALL_BINDIRtoconfig.bindir, sorustdoc can find rustc relative to the toolchain sysroot. However, if a
distro script like Fedora's
%configuresets an absolute path, thenrustdoc's
sysroot.join(bin_path)ignores that sysroot altogether.That would be OK once the toolchain is actually installed, but it breaks
the in-tree doc tests during the build, since
/usr/bin/rustcis stillthe old version. So now we try to make
RUSTC_INSTALL_BINDIRrelativeto the sysroot prefix in the first place.
r? @Mark-Simulacrum