Promote aws-ubuntu site to tier1 and update for Ubuntu 26.04

configs/sites/tier1/aws-ubuntu/config.yaml

@@ -0,0 +1,7 @@
+config:
+  build_jobs: 8
+
+  # Build stage and caches use the common defaults under
+  # ${SPACK_STACK_DIR}/cache on the root disk. Don't point them at /tmp: on
+  # Ubuntu 26.04 /tmp is a RAM-backed tmpfs (half of RAM, with per-user quotas),
+  # and a unified-env build fills it ("Disk quota exceeded").

configs/sites/tier1/aws-ubuntu/packages.yaml

@@ -0,0 +1,121 @@
+packages:
+  # Package constraints.
+  ewok-env:
+    require:
+    - +ecflow
+  # Soft preference, as on other tier1 sites. With gcc 14, +lidar2nc and +modis
+  # are dropped: they need hdf-eos2, and common pins hdf-eos2@2.20v1.00, which
+  # conflicts with %gcc@14: (3.0+ is required).
+  met:
+    variants: +python +grib2 +graphics +lidar2nc +modis
+  py-netcdf4:
+    require:
+    - "@1.7.2"
+  jedi-base-env:
+    require: [+fftw, +hdf4]
+  # jedi-ufs-env needs +bufrquery; unconstrained, the root splits in two.
+  jedi-python-env:
+    require: [+bufrquery]
+  # Unconstrained, jedi-tools-env falls back to py-myst-parser@1/py-sphinx@6,
+  # which cap py-attrs@:21 and py-docutils@:0.19 and split py-attrs, py-eccodes,
+  # py-rasterio, jedi-python-env and awscli-v2. common/packages_oneapi.yaml
+  # already requires py-sphinx@9: for the same reason.
+  py-myst-parser:
+    require: ['@5:']
+  py-sphinx:
+    require: ['@9:']
+  fontconfig:
+    variants: +pic
+  pixman:
+    variants: +pic
+  cairo:
+    variants: +pic
+
+  # System packages (Ubuntu 26.04). Derived with `spack external find`
+  # excluding cmake, curl, openssl, openssh, python and zlib (the multiarch
+  # libdir breaks pmix's zlib detection). coreutils (uutils) and binutils
+  # (2.46, no gold) aren't detected and are left for spack to build if needed.
+  autoconf:
+    externals:
+    - spec: autoconf@2.72
+      prefix: /usr
+  automake:
+    externals:
+    - spec: automake@1.18.1
+      prefix: /usr
+  diffutils:
+    externals:
+    - spec: diffutils@3.12
+      prefix: /usr
+  findutils:
+    externals:
+    - spec: findutils@4.10.0
+      prefix: /usr
+  flex:
+    externals:
+    - spec: flex@2.6.4+lex
+      prefix: /usr
+  gawk:
+    externals:
+    - spec: gawk@5.3.2
+      prefix: /usr
+  gettext:
+    externals:
+    - spec: gettext@0.23.2
+      prefix: /usr
+  git:
+    externals:
+    - spec: git@2.53.0~tcltk
+      prefix: /usr
+  git-lfs:
+    externals:
+    - spec: git-lfs@3.7.1
+      prefix: /usr
+  gmake:
+    externals:
+    - spec: gmake@4.4.1
+      prefix: /usr
+  grep:
+    externals:
+    - spec: grep@3.12
+      prefix: /usr
+  groff:
+    externals:
+    - spec: groff@1.23.0
+      prefix: /usr
+  libtool:
+    externals:
+    - spec: libtool@2.5.4
+      prefix: /usr
+  m4:
+    externals:
+    - spec: m4@1.4.21
+      prefix: /usr
+  perl:
+    externals:
+    - spec: perl@5.40.1~cpanm+opcode+open+shared+threads
+      prefix: /usr
+  pkgconf:
+    externals:
+    - spec: pkgconf@2.5.1
+      prefix: /usr
+  sed:
+    externals:
+    - spec: sed@4.9
+      prefix: /usr
+  tar:
+    buildable: false
+    externals:
+    - spec: tar@1.35
+      prefix: /usr
+  wget:
+    buildable: false
+    externals:
+    - spec: wget@1.25.0
+      prefix: /usr
+  # Not auto-detected (qmake is a qtchooser shim); apt qtbase5-dev. common requires qt@5.
+  qt:
+    buildable: false
+    externals:
+    - spec: qt@5.15.18
+      prefix: /usr

configs/sites/tier1/aws-ubuntu/packages_gcc.yaml

@@ -0,0 +1,13 @@
+packages:
+  gcc:
+    buildable: false
+    externals:
+    - spec: gcc@14.3.0 languages:='c,c++,fortran'
+      prefix: /usr
+      extra_attributes:
+        compilers:
+          c: /usr/bin/gcc-14
+          cxx: /usr/bin/g++-14
+          fortran: /usr/bin/gfortran-14
+  mpi:
+    require: ['openmpi@5.0.10']

configs/sites/tier2/aws-ubuntu2404/packages_oneapi.yaml → configs/sites/tier1/aws-ubuntu/packages_oneapi.yaml

@@ -1,9 +1,10 @@
 packages:
 
   # Compilers.
+  # Language preferences for oneAPI come from common/packages_oneapi.yaml. Don't
+  # add "all: prefer: ['%oneapi']": it acts as a dependency constraint and makes
+  # spack rebuild system externals.
   all:
-    prefer:
-    - '%oneapi'
     conflict:
     - '%c=oneapi %fortran=gcc'
     - '%c,cxx=oneapi %fortran=gcc'
@@ -13,8 +14,6 @@ packages:
     - '%fortran=oneapi %c,cxx=gcc'
     - '%fortran=gcc %c,cxx=oneapi'
     - '%fortran=gcc %c=oneapi'
-    providers:
-      mpi:: [intel-oneapi-mpi@2021.18]
 
   intel-oneapi-compilers:
     buildable: false
@@ -33,6 +32,13 @@ packages:
           fortran: /opt/intel/oneapi/compiler/2026.1/bin/ifx
           c: /opt/intel/oneapi/compiler/2026.1/bin/icx
           cxx: /opt/intel/oneapi/compiler/2026.1/bin/icpx
+        # Ubuntu 26.04's default gcc is 15. Left alone, icx/icpx pick the newest
+        # installed GCC for libstdc++ headers and libs, and ifx links its
+        # runtime. Pin them to gcc 14 so they match the gcc env.
+        flags:
+          cflags: --gcc-install-dir=/usr/lib/gcc/x86_64-linux-gnu/14
+          cxxflags: --gcc-install-dir=/usr/lib/gcc/x86_64-linux-gnu/14
+          fflags: -gcc-name=/usr/bin/gcc-14 -gxx-name=/usr/bin/g++-14
   openmpi:
     buildable: false
   mpich:
@@ -43,13 +49,13 @@ packages:
     - intel-oneapi-mpi@2021.18
   gcc:
     externals:
-    - spec: gcc@13.3.0 languages:='c,c++,fortran'
+    - spec: gcc@14.3.0 languages:='c,c++,fortran'
       prefix: /usr
       extra_attributes:
         compilers:
-          c: /usr/bin/gcc
-          cxx: /usr/bin/g++
-          fortran: /usr/bin/gfortran
+          c: /usr/bin/gcc-14
+          cxx: /usr/bin/g++-14
+          fortran: /usr/bin/gfortran-14
     buildable: false
   intel-oneapi-mkl:
     buildable: false
@@ -83,6 +89,15 @@ packages:
       - tbb/2023.1
 
   # Package constraints.
+  # Avoid duplicates. Unpinned, gmao-swell-env and py-pyresample pull two
+  # py-dask versions, which splits py-setuptools-scm (8 vs 9) and cascades into
+  # py-netcdf4, py-xarray, py-zarr and jedi-python-env. The gcc env settles on
+  # 2024.12.1 without a pin.
+  py-dask:
+    require: ['@2024.12.1']
+  # Unconstrained, one met concretizes ~graphics. Keep common's +shared-intel.
+  met:
+    require: ['+graphics +shared-intel']
   jedi-base-env:
     require: [+fftw, +hdf4]
   jedi-python-env: