docs: remove leftover references to compiler: entries (#49824)

Signed-off-by: Massimiliano Culpo <massimiliano.culpo@gmail.com>

lib/spack/docs/basic_usage.rst

@@ -1409,27 +1409,29 @@ that executables will run without the need to set ``LD_LIBRARY_PATH``.
 
 .. code-block:: yaml
 
-  compilers:
+  packages:
-    - compiler:
+    gcc:
-        spec: gcc@4.9.3
+      externals:
-        paths:
+      - spec: gcc@4.9.3
-          cc: /opt/gcc/bin/gcc
+        prefix: /opt/gcc
-          c++: /opt/gcc/bin/g++
+        extra_attributes:
-          f77: /opt/gcc/bin/gfortran
+          compilers:
-          fc: /opt/gcc/bin/gfortran
+            c: /opt/gcc/bin/gcc
-        environment:
+            cxx: /opt/gcc/bin/g++
-          unset:
+            fortran: /opt/gcc/bin/gfortran
-            - BAD_VARIABLE
+          environment:
-          set:
+            unset:
-            GOOD_VARIABLE_NUM: 1
+              - BAD_VARIABLE
-            GOOD_VARIABLE_STR: good
+            set:
-          prepend_path:
+              GOOD_VARIABLE_NUM: 1
-            PATH: /path/to/binutils
+              GOOD_VARIABLE_STR: good
-          append_path:
+            prepend_path:
-            LD_LIBRARY_PATH: /opt/gcc/lib
+              PATH: /path/to/binutils
-        extra_rpaths:
+            append_path:
-        - /path/to/some/compiler/runtime/directory
+              LD_LIBRARY_PATH: /opt/gcc/lib
-        - /path/to/some/other/compiler/runtime/directory
+          extra_rpaths:
+          - /path/to/some/compiler/runtime/directory
+          - /path/to/some/other/compiler/runtime/directory
 
 
 ^^^^^^^^^^^^^^^^^^^^^^^

lib/spack/docs/environments.rst

@@ -667,11 +667,11 @@ a ``packages.yaml`` file) could contain:
      # ...
      packages:
        all:
-         compiler: [intel]
+         providers:
+           mpi: [openmpi]
      # ...
 
-This configuration sets the default compiler for all packages to
+This configuration sets the default mpi provider to be openmpi.
-``intel``.
 
 ^^^^^^^^^^^^^^^^^^^^^^^
 Included configurations

lib/spack/docs/example_files/spack.yaml

@@ -1,161 +0,0 @@
-spack:
-  definitions:
-  - compiler-pkgs:
-    - 'llvm+clang@6.0.1 os=centos7'
-    - 'gcc@6.5.0 os=centos7'
-    - 'llvm+clang@6.0.1 os=ubuntu18.04'
-    - 'gcc@6.5.0 os=ubuntu18.04'
-  - pkgs:
-    - readline@7.0
-    # - xsdk@0.4.0
-  - compilers:
-    - '%gcc@5.5.0'
-    - '%gcc@6.5.0'
-    - '%gcc@7.3.0'
-    - '%clang@6.0.0'
-    - '%clang@6.0.1'
-  - oses:
-    - os=ubuntu18.04
-    - os=centos7
-
-  specs:
-  - matrix:
-    - [$pkgs]
-    - [$compilers]
-    - [$oses]
-    exclude:
-      - '%gcc@7.3.0 os=centos7'
-      - '%gcc@5.5.0 os=ubuntu18.04'
-
-  mirrors:
-    cloud_gitlab: https://mirror.spack.io
-
-  compilers:
-    # The .gitlab-ci.yml for this project picks a Docker container which does
-    # not have any compilers pre-built and ready to use, so we need to fake the
-    # existence of those here.
-    - compiler:
-        operating_system: centos7
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: gcc@5.5.0
-        target: x86_64
-    - compiler:
-        operating_system: centos7
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: gcc@6.5.0
-        target: x86_64
-    - compiler:
-        operating_system: centos7
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: clang@6.0.0
-        target: x86_64
-    - compiler:
-        operating_system: centos7
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: clang@6.0.1
-        target: x86_64
-
-    - compiler:
-        operating_system: ubuntu18.04
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: clang@6.0.0
-        target: x86_64
-    - compiler:
-        operating_system: ubuntu18.04
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: clang@6.0.1
-        target: x86_64
-    - compiler:
-        operating_system: ubuntu18.04
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: gcc@6.5.0
-        target: x86_64
-    - compiler:
-        operating_system: ubuntu18.04
-        modules: []
-        paths:
-          cc: /not/used
-          cxx: /not/used
-          f77: /not/used
-          fc: /not/used
-        spec: gcc@7.3.0
-        target: x86_64
-
-  gitlab-ci:
-    bootstrap:
-      - name: compiler-pkgs
-        compiler-agnostic: true
-    mappings:
-      - # spack-cloud-ubuntu
-        match:
-          # these are specs, if *any* match the spec under consideration, this
-          # 'mapping' will be used to generate the CI job
-          - os=ubuntu18.04
-        runner-attributes:
-          # 'tags' and 'image' go directly onto the job, 'variables' will
-          # be added to what we already necessarily create for the job as
-          # a part of the CI workflow
-          tags:
-            - spack-k8s
-          image:
-            name: scottwittenburg/spack_builder_ubuntu_18.04
-            entrypoint: [""]
-      - # spack-cloud-centos
-        match:
-          # these are specs, if *any* match the spec under consideration, this
-          # 'mapping' will be used to generate the CI job
-          - 'os=centos7'
-        runner-attributes:
-          tags:
-            - spack-k8s
-          image:
-            name: scottwittenburg/spack_builder_centos_7
-            entrypoint: [""]
-
-  cdash:
-    build-group: Release Testing
-    url: http://cdash
-    project: Spack Testing
-    site: Spack Docker-Compose Workflow
-
-  repos: []
-  upstreams: {}
-  modules:
-    enable: []
-  packages: {}
-  config: {}

lib/spack/docs/gpu_configuration.rst

@@ -23,7 +23,6 @@ components for use by dependent packages:
 
    packages:
      all:
-       compiler: [rocmcc@=5.3.0]
        variants: amdgpu_target=gfx90a
      hip:
        buildable: false
@@ -70,16 +69,15 @@ This is in combination with the following compiler definition:
 
 .. code-block:: yaml
 
-   compilers:
+   packages:
-   - compiler:
+     llvm-amdgpu:
-       spec: rocmcc@=5.3.0
+       externals:
-       paths:
+       - spec: llvm-amdgpu@=5.3.0
-         cc: /opt/rocm-5.3.0/bin/amdclang
+         prefix: /opt/rocm-5.3.0
-         cxx: /opt/rocm-5.3.0/bin/amdclang++
+         compilers:
-         f77: null
+           c: /opt/rocm-5.3.0/bin/amdclang
-         fc: /opt/rocm-5.3.0/bin/amdflang
+           cxx: /opt/rocm-5.3.0/bin/amdclang++
-       operating_system: rhel8
+           fortran: null
-       target: x86_64
 
 This includes the following considerations:
 

lib/spack/docs/packages_yaml.rst

@@ -557,14 +557,13 @@ preferences.
    FAQ: :ref:`Why does Spack pick particular versions and variants? <faq-concretizer-precedence>`
 
 
-Most package preferences (``compilers``, ``target`` and ``providers``)
+The ``target`` and ``providers`` preferences
 can only be set globally under the ``all`` section of ``packages.yaml``:
 
 .. code-block:: yaml
 
    packages:
      all:
-       compiler: [gcc@12.2.0, clang@12:, oneapi@2023:]
        target: [x86_64_v3]
        providers:
          mpi: [mvapich2, mpich, openmpi]