Commits on Jan 15, 2023

1. stdenv/linux/default.nix: add gcc rebuild during bootstrap …

   Before the change our rebuild chain was the followin:
   
   - `bootstrapTools` install
   - `binutils` built by `bootstrapTools`
   - `glibc` built by `bootstrapTools`
   - `gcc` built by `bootstrapTools`
   
   As a result `glibc` contained code generated by `bootstrapTools`'s
   `gcc`. And (what worse) copied `libgcc_s.so.1` as is from
   `bootstrapTools`'s `gcc`.
   
   Such `libgcc_s.so.1` was not compatible with `nixpkgs` `gcc` at
   least on `aarch64` where newer `libgcc` is expected to have new symbols.
   As a result linking failed as:
   
       ld: /build/test.o: in function `foo(int)':
       test.cpp:(.text+0x2c): undefined reference to `__aarch64_ldadd4_acq_rel'
       collect2: error: ld returned 1 exit status
   
   The change rejigs rebuild sequence as:
   
   - `bootstrapTools` install
   - `binutils` built by `bootstrapTools`
   - `gcc` built by `bootstrapTools`
   - `glibc` built by `gcc`
   - `gcc` built by `gcc`
   
   As a result `glibc` gets built by fresher `gcc` and embeds a copy
   of `libgcc_s.so.1`.
   
   Co-authored-by: Rick van Schijndel <Mindavi@users.noreply.github.com>

   

   trofi and Mindavi committed Jan 15, 2023
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