autotools: remove FORCE_UNSAFE_CONFIGURE from docs, commands, code (#16145)

Since #16132, we've consolidated the setting of FORCE_UNSAFE_CONFIGURE to
`autotools.py`, so we don't need to use it in packages like `coreutils`,
in our commands, or in our container recipes.

- [x] Remove FORCE_UNSAFE_CONFIGURE from packages
- [x] Remove FORCE_UNSAFE_CONFIGURE from container recipes
- [x] Remove FORCE_UNSAFE_CONFIGURE from `spack ci` command

lib/spack/docs/workflows.rst

@@ -1432,10 +1432,6 @@ The following functionality is prepared:
 
 #. Base image: the example starts from a minimal ubuntu.
 
-#. Installing as root: docker images are usually set up as root.
-   Since some autotools scripts might complain about this being unsafe, we set
-   ``FORCE_UNSAFE_CONFIGURE=1`` to avoid configure errors.
-
 #. Pre-install the spack dependencies, including modules from the packages.
    This avoids needing to build those from scratch via ``spack bootstrap``.
    Package installs are followed by a clean-up of the system package index,
@@ -1466,8 +1462,7 @@ In order to build and run the image, execute:
 
    # general environment for docker
    ENV        DEBIAN_FRONTEND=noninteractive \
-              SPACK_ROOT=/usr/local \
-              FORCE_UNSAFE_CONFIGURE=1
+              SPACK_ROOT=/usr/local
 
    # install minimal spack dependencies
    RUN        apt-get update \

lib/spack/spack/cmd/ci.py

@@ -283,8 +283,6 @@ def ci_rebuild(args):
 
     spack_cmd = exe.which('spack')
 
-    os.environ['FORCE_UNSAFE_CONFIGURE'] = '1'
-
     cdash_report_dir = os.path.join(ci_artifact_dir, 'cdash_report')
     temp_dir = os.path.join(ci_artifact_dir, 'jobs_scratch_dir')
     job_log_dir = os.path.join(temp_dir, 'logs')

share/spack/docker/centos-6.dockerfile

@@ -5,7 +5,6 @@ ENV DOCKERFILE_BASE=centos            \
     DOCKERFILE_DISTRO=centos          \
     DOCKERFILE_DISTRO_VERSION=6       \
     SPACK_ROOT=/opt/spack             \
-    FORCE_UNSAFE_CONFIGURE=1          \
     DEBIAN_FRONTEND=noninteractive    \
     CURRENTLY_BUILDING_DOCKER_IMAGE=1 \
     container=docker

share/spack/docker/centos-7.dockerfile

@@ -5,7 +5,6 @@ ENV DOCKERFILE_BASE=centos            \
     DOCKERFILE_DISTRO=centos          \
     DOCKERFILE_DISTRO_VERSION=7       \
     SPACK_ROOT=/opt/spack             \
-    FORCE_UNSAFE_CONFIGURE=1          \
     DEBIAN_FRONTEND=noninteractive    \
     CURRENTLY_BUILDING_DOCKER_IMAGE=1 \
     container=docker

share/spack/docker/ubuntu-1604.dockerfile

@@ -5,7 +5,6 @@ ENV DOCKERFILE_BASE=ubuntu:16.04      \
     DOCKERFILE_DISTRO=ubuntu          \
     DOCKERFILE_DISTRO_VERSION=16.04   \
     SPACK_ROOT=/opt/spack             \
-    FORCE_UNSAFE_CONFIGURE=1          \
     DEBIAN_FRONTEND=noninteractive    \
     CURRENTLY_BUILDING_DOCKER_IMAGE=1 \
     container=docker
@@ -90,4 +89,3 @@ RUN spack spec hdf5+mpi
 
 ENTRYPOINT ["/bin/bash", "/opt/spack/share/spack/docker/entrypoint.bash"]
 CMD ["docker-shell"]
-

share/spack/docker/ubuntu-1804.dockerfile

@@ -5,7 +5,6 @@ ENV DOCKERFILE_BASE=ubuntu            \
     DOCKERFILE_DISTRO=ubuntu          \
     DOCKERFILE_DISTRO_VERSION=18.04   \
     SPACK_ROOT=/opt/spack             \
-    FORCE_UNSAFE_CONFIGURE=1          \
     DEBIAN_FRONTEND=noninteractive    \
     CURRENTLY_BUILDING_DOCKER_IMAGE=1 \
     container=docker

share/spack/docs/docker/module-file-tutorial/Dockerfile

@@ -2,8 +2,7 @@ FROM ubuntu:16.04
 
 # General environment for docker
 ENV DEBIAN_FRONTEND=noninteractive \
-    SPACK_ROOT=/usr/local \
-    FORCE_UNSAFE_CONFIGURE=1
+    SPACK_ROOT=/usr/local
 
 # Install system packages
 RUN apt-get update \
@@ -48,4 +47,3 @@ RUN spack install netlib-scalapack ^openmpi ^openblas %gcc@7.2.0 \
 
 # image run hook: the -l will make sure /etc/profile environments are loaded
 CMD /bin/bash -l
-

var/spack/repos/builtin/packages/coreutils/package.py

@@ -34,6 +34,5 @@ def configure_args(self):
                 configure_args.append('--program-prefix=g')
             configure_args.append('--without-gmp')
             configure_args.append('gl_cv_func_ftello_works=yes')
-            configure_args.append('FORCE_UNSAFE_CONFIGURE=1')
 
             return configure_args