Draft: Drop Autotools

This removes the Autotools build system.

.gitlab-ci.yml

@@ -134,7 +134,7 @@ include:
     CC: gcc
     CFLAGS: -g -O2
     FC: gfortran
-    FCFLAGS: -g -O2
+    FFLAGS: -g -O2
     LIBCHECK_ROOT: ${CI_GITIGNORE_DIR}/libcheck
     LIBCHECK_URL: https://github.com/libcheck/check/releases/download/0.15.2/check-0.15.2.tar.gz
     LIBCHECK_SHA256: a8de4e0bacfb4d76dd1c618ded263523b53b85d92a146d8835eb1a52932fa20a
@@ -204,41 +204,10 @@ include:
     paths:
       - ${LIBCHECK_ROOT}
 
-.common_autotools:
-  extends: .common
-  variables:
-    CONFIG_EXTRA_ARGS:
-    MAKEFLAGS: --jobs=${JOB_COUNT} V=1
-    AM_COLOR_TESTS: always
-  script:
-    - >
-      test -f ./configure || ./autogen.sh
-    - mkdir build && cd build
-    - >
-      ../configure
-      --enable-check
-      --with-check-root="${LIBCHECK_ROOT}"
-      --enable-python
-      --disable-maintainer-mode
-      --prefix="${INSTALL_PREFIX}"
-      ${CONFIG_EXTRA_ARGS}
-    - make --output-sync=target check AM_COLOR_TESTS=no TESTS= 2>&1 | tee "${BUILD_LOG}"
-    - make --silent --keep-going check
-    - make install
-    - make installcheck
-    - !reference [.common, script]
-  artifacts:
-    when: on_failure
-    paths:
-      - "**/config.log"
-      - "**/test-suite.log"
-
 .common_cmake:
   extends: .common
   variables:
     CMAKE_EXTRA_ARGS:
-    # Cmake initializes Fortran compiler flags from FFLAGS:
-    FFLAGS: ${FCFLAGS}
   script:
     - mkdir build && cd build
     - >
@@ -279,7 +248,7 @@ include:
 .check_gcc:
   variables:
     CFLAGS: -g -O2 -Wall -Wextra -pedantic
-    FCFLAGS: -g -O2 -Wall -Wextra -pedantic -fbounds-check
+    FFLAGS: -g -O2 -Wall -Wextra -pedantic -fbounds-check
   before_script: []
 
 .check_intel:
@@ -299,42 +268,23 @@ include:
 .check_nag:
   variables:
     FC: nagfor
-    FCFLAGS: -g -O2 -C=all
+    FFLAGS: -g -O2 -C=all
     # Ignore Questionable warnings:
     WARNINGS_AWK_SCRIPT: '!/^\[NAG Fortran Compiler normal termination/ && (/warning/ || /WARNING/ || /Warning/)'
   before_script:
     - module load nag/7.1-gcc-11.2.0
 
-Check with GCC 11.2.0 (Autotools):
-  extends:
-    - .common_autotools
-    - .check_gcc
-  before_script:
-    - !reference [.common_autotools, before_script]
-    - !reference [.check_gcc, before_script]
-  cache:
-    policy: pull-push
-
-Check with GCC 11.2.0 (CMake, Ninja):
+Check with GCC 11.2.0 (Ninja):
   extends:
     - .common_cmake_ninja
     - .check_gcc
   before_script:
     - !reference [.common_cmake_ninja, before_script]
     - !reference [.check_gcc, before_script]
+  cache:
+    policy: pull-push
 
-Check with Intel 2021.5.0 (Autotools):
-  extends:
-    - .common_autotools
-    - .check_intel
-  variables:
-    # Ignore the warning on a deprecated flag injected by libtool:
-    WARNINGS_AWK_SCRIPT: '!/-nofor_main/ && (/warning/ || /WARNING/ || /Warning/)'
-  before_script:
-    - !reference [.common_autotools, before_script]
-    - !reference [.check_intel, before_script]
-
-Check with Intel 2021.5.0 (CMake, Unix Makefiles):
+Check with Intel 2021.5.0 (Unix Makefiles):
   extends:
     - .common_cmake_makefiles
     - .check_intel
@@ -342,17 +292,7 @@ Check with Intel 2021.5.0 (CMake, Unix Makefiles):
     - !reference [.common_cmake_makefiles, before_script]
     - !reference [.check_intel, before_script]
 
-Check with NVHPC 24.7 (Autotools):
-  extends:
-    - .common_autotools
-    - .check_nvhpc
-  before_script:
-    - !reference [.common_autotools, before_script]
-    - !reference [.check_nvhpc, before_script]
-    # Libtool does not know about NVHPC and its PIC flag:
-    - export FCFLAGS="$FCFLAGS -fpic"
-
-Check with NVHPC 24.7 (CMake, Ninja):
+Check with NVHPC 24.7 (Ninja):
   extends:
     - .common_cmake_ninja
     - .check_nvhpc
@@ -360,17 +300,7 @@ Check with NVHPC 24.7 (CMake, Ninja):
     - !reference [.common_cmake_ninja, before_script]
     - !reference [.check_nvhpc, before_script]
 
-Check with NAG 7.1.7114 (Autotools):
-  extends:
-    - .common_autotools
-    - .check_nag
-  before_script:
-    - !reference [.common_autotools, before_script]
-    - !reference [.check_nag, before_script]
-    # nagfor is supposed to use non-default gcc:
-    - export FCFLAGS="-Wc=`which gcc` $FCFLAGS"
-
-Check with NAG 7.1.7114 (CMake, Unix Makefiles):
+Check with NAG 7.1.7114 (Unix Makefiles):
   extends:
     - .common_cmake_makefiles
     - .check_nag