chunks:
- build-depends: []
  build-mode: bootstrap
  name: stage1-binutils
  prefix: /tools
  ref: c95c6c25ca35e70d2c21daf138daff8371a8c8d9
  repo: upstream:binutils-redhat
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  build-mode: bootstrap
  name: stage1-gcc
  prefix: /tools
  ref: 86eee3c35c3f43b3769a5bd810a45228dcc54343
  repo: upstream:gcc-tarball
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  build-mode: bootstrap
  name: stage2-linux-api-headers
  prefix: /tools
  ref: f9755c0c4d5274bbb4a34ca147690ec3bba02d94
  repo: upstream:linux
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-linux-api-headers
  build-mode: bootstrap
  name: stage2-eglibc
  prefix: /tools
  ref: e51d56cdcf2d9a4372c89a1e88ab78bf7c329df7
  repo: upstream:eglibc2
  unpetrify-ref: baserock/2.15-build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-binutils
  prefix: /tools
  ref: c95c6c25ca35e70d2c21daf138daff8371a8c8d9
  repo: upstream:binutils-redhat
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-gcc-fixed-headers
  prefix: /tools
  ref: 86eee3c35c3f43b3769a5bd810a45228dcc54343
  repo: upstream:gcc-tarball
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  - stage2-gcc-fixed-headers
  build-mode: bootstrap
  name: stage2-gcc
  prefix: /tools
  ref: 86eee3c35c3f43b3769a5bd810a45228dcc54343
  repo: upstream:gcc-tarball
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-busybox
  prefix: /tools
  ref: eeb9014f28e3aa00673a0fad127e7420da4392db
  repo: upstream:busybox
  unpetrify-ref: baserock/build-essential
- build-depends: []
  build-mode: bootstrap
  name: stage2-fhs-dirs
  prefix: /tools
  ref: 442e2a6453ec380bf9d64f6be50e57d54ddf93d3
  repo: baserock:baserock/fhs-dirs
  unpetrify-ref: master
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-gawk
  prefix: /tools
  ref: 6a0eb04c3d2ac24d80d505b42a8f67799487d133
  repo: upstream:gawk
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-make
  prefix: /tools
  ref: 56968f58301e6e5157cf4c8b6deefbaff2955eba
  repo: upstream:make
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage1-binutils
  - stage1-gcc
  - stage2-linux-api-headers
  - stage2-eglibc
  build-mode: bootstrap
  name: stage2-reset-specs
  prefix: /tools
  ref: e51d56cdcf2d9a4372c89a1e88ab78bf7c329df7
  repo: upstream:eglibc2
  unpetrify-ref: baserock/2.15-build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  build-mode: staging
  name: fhs-dirs
  prefix: /usr
  ref: 442e2a6453ec380bf9d64f6be50e57d54ddf93d3
  repo: baserock:baserock/fhs-dirs
  unpetrify-ref: master
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  build-mode: staging
  name: linux-api-headers
  prefix: /usr
  ref: f9755c0c4d5274bbb4a34ca147690ec3bba02d94
  repo: upstream:linux
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - linux-api-headers
  build-mode: staging
  name: eglibc
  prefix: /usr
  ref: e51d56cdcf2d9a4372c89a1e88ab78bf7c329df7
  repo: upstream:eglibc2
  unpetrify-ref: baserock/2.15-build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  build-mode: staging
  name: zlib
  prefix: /usr
  ref: db3aed6856d7a23186844fdf93105cad2fcf2f2f
  repo: upstream:zlib
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  - zlib
  build-mode: staging
  name: binutils
  prefix: /usr
  ref: c95c6c25ca35e70d2c21daf138daff8371a8c8d9
  repo: upstream:binutils-redhat
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  build-mode: staging
  name: busybox
  prefix: /usr
  ref: eeb9014f28e3aa00673a0fad127e7420da4392db
  repo: upstream:busybox
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  build-mode: staging
  name: gawk
  prefix: /usr
  ref: 6a0eb04c3d2ac24d80d505b42a8f67799487d133
  repo: upstream:gawk
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  - zlib
  build-mode: staging
  name: gcc
  prefix: /usr
  ref: 86eee3c35c3f43b3769a5bd810a45228dcc54343
  repo: upstream:gcc-tarball
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  build-mode: staging
  name: make
  prefix: /usr
  ref: 56968f58301e6e5157cf4c8b6deefbaff2955eba
  repo: upstream:make
  unpetrify-ref: baserock/build-essential
- build-depends:
  - stage2-binutils
  - stage2-busybox
  - stage2-eglibc
  - stage2-fhs-dirs
  - stage2-gawk
  - stage2-gcc
  - stage2-linux-api-headers
  - stage2-make
  - stage2-reset-specs
  - eglibc
  - zlib
  build-mode: staging
  name: ccache
  prefix: /usr
  ref: 0827e0b0f9c401b3aac87bb66fdeb81d6bdd6139
  repo: upstream:ccache
  unpetrify-ref: baserock/build-essential
description: 'Toolchain stratum


  Stage 1: build a minimal cross compiler with the host''s tools.


  Starting with a cross compiler ensures that (a) nothing from the host

  can leak into the build-essential artifacts, and (b) cross-compiling

  build-essential is fully tested and supported, since we always use the

  cross code paths.


  Stage 2: cross-build the whole of build-essential, using the host''s tools

  but the cross-compiler toolchain.


  Stage 2 GCC outputs code for the same ''bootstrap'' machine as stage 1 GCC,

  but because stage 2 GCC is also built to *run* on the bootstrap machine

  it can only execute inside the stage 3 chroot (due to being built against

  a libc with a non-standard prefix).


  Stage 3: build the whole of build-essential again, this time using a

  staging area containing only the output of stage 2. The result of this

  build is fully reproducible.


  We do a switch-a-roo between stage 2 and 3: stages 2 chunks are all built

  to run on a host *-bootstrap-* while stage 3 chunks are native-built for

  a *-baserock-* machine. This works, because the cross build was all for

  show (and cleanliness) and the binaries actually still run on the host.


  After build-essential is built we do another trick. See

  stage2-fhs-dirs.morph for details. Basically, /bin is a symlink to

  /tools/bin during stage 2 but in stage 3 it becomes a real directory

  again.

  '
kind: stratum
name: build-essential