Configuration tutorial section updates (#102)

* edit packages config in an environment

* update external specification to new format

* update warning about packages.yaml (since all packages config editing is now done in an environment)

* clarify YAML format intro

* update output examples

* add clarifications related to managing configuration in the environment vs. in other scopes

* more distinctions between configuration managed in the env scope vs. other scopes (as relevent to particular subsections)

outputs/config/0.compiler_flags.out

@@ -5,12 +5,13 @@ json-fortran%clang@6.0.0-gfortran
 
 Concretized
 --------------------------------
-json-fortran@7.1.0%clang@6.0.0-gfortran cppflags="-g"  build_type=RelWithDebInfo arch=linux-ubuntu18.04-x86_64
-    ^cmake@3.17.3%clang@6.0.0-gfortran cppflags="-g" ~doc+ncurses+openssl+ownlibs~qt arch=linux-ubuntu18.04-x86_64
+json-fortran@7.1.0%clang@6.0.0-gfortran cppflags="-g" ~ipo build_type=RelWithDebInfo arch=linux-ubuntu18.04-x86_64
+    ^cmake@3.18.4%clang@6.0.0-gfortran cppflags="-g" ~doc+ncurses+openssl+ownlibs~qt patches=bf695e3febb222da2ed94b3beea600650e4318975da90e4a71d6f31a6d5d8c3d arch=linux-ubuntu18.04-x86_64
         ^ncurses@6.2%clang@6.0.0-gfortran cppflags="-g" ~symlinks+termlib arch=linux-ubuntu18.04-x86_64
             ^pkgconf@1.7.3%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-        ^openssl@1.1.1g%clang@6.0.0-gfortran cppflags="-g" +systemcerts arch=linux-ubuntu18.04-x86_64
-            ^perl@5.30.3%clang@6.0.0-gfortran cppflags="-g" +cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+        ^openssl@1.1.1h%clang@6.0.0-gfortran cppflags="-g" +systemcerts arch=linux-ubuntu18.04-x86_64
+            ^perl@5.32.0%clang@6.0.0-gfortran cppflags="-g" +cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+                ^berkeley-db@18.1.40%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^gdbm@1.18.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                     ^readline@8.0%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-            ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic+shared arch=linux-ubuntu18.04-x86_64
+            ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic+shared arch=linux-ubuntu18.04-x86_64

outputs/config/0.externals.out

@@ -5,6 +5,5 @@ hdf5
 
 Concretized
 --------------------------------
-hdf5@1.10.6%gcc@7.5.0~cxx~debug~fortran~hl~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%gcc@7.5.0~cxx~debug~fortran~hl~java~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
     ^zlib@1.2.8%gcc@7.5.0+optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/0.prefs.out

@@ -5,24 +5,24 @@ hdf5
 
 Concretized
 --------------------------------
-hdf5@1.10.6%gcc@7.5.0~cxx~debug~fortran~hl+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
-    ^openmpi@3.1.6%gcc@7.5.0~atomics~cuda~cxx~cxx_exceptions+gpfs~java~legacylaunchers~memchecker~pmi~sqlite3+static~thread_multiple+vt+wrapper-rpath fabrics=none schedulers=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%gcc@7.5.0~cxx~debug~fortran~hl~java+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+    ^openmpi@3.1.6%gcc@7.5.0~atomics~cuda~cxx~cxx_exceptions+gpfs~java~legacylaunchers~lustre~memchecker~pmi~singularity~sqlite3+static~thread_multiple+vt+wrapper-rpath fabrics=none schedulers=none arch=linux-ubuntu18.04-x86_64
         ^hwloc@1.11.11%gcc@7.5.0~cairo~cuda~gl~libudev+libxml2~netloc~nvml+pci+shared arch=linux-ubuntu18.04-x86_64
-            ^libpciaccess@0.13.5%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
+            ^libpciaccess@0.16%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                 ^libtool@2.4.6%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                     ^m4@1.4.18%gcc@7.5.0+sigsegv patches=3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00,fc9b61654a3ba1a8d6cd78ce087e7c96366c290bc8d2c299f09828d793b853c8 arch=linux-ubuntu18.04-x86_64
                         ^libsigsegv@2.12%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                 ^pkgconf@1.7.3%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                 ^util-macros@1.19.1%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
             ^libxml2@2.9.10%gcc@7.5.0~python arch=linux-ubuntu18.04-x86_64
                 ^libiconv@1.16%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
-                ^xz@5.2.5%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
+                ^xz@5.2.5%gcc@7.5.0~pic arch=linux-ubuntu18.04-x86_64
                 ^zlib@1.2.11%gcc@7.5.0+optimize+pic+shared arch=linux-ubuntu18.04-x86_64
-            ^numactl@2.0.12%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
+            ^numactl@2.0.14%gcc@7.5.0 patches=4e1d78cbbb85de625bad28705e748856033eaafab92a66dffd383a3d7e00cc94 arch=linux-ubuntu18.04-x86_64
                 ^autoconf@2.69%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
-                    ^perl@5.30.3%gcc@7.5.0+cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+                    ^perl@5.32.0%gcc@7.5.0+cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+                        ^berkeley-db@18.1.40%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                         ^gdbm@1.18.1%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                             ^readline@8.0%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
                                 ^ncurses@6.2%gcc@7.5.0~symlinks+termlib arch=linux-ubuntu18.04-x86_64
                 ^automake@1.16.2%gcc@7.5.0 arch=linux-ubuntu18.04-x86_64
-

outputs/config/1.externals.out

@@ -5,6 +5,5 @@ hdf5%clang
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
     ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/1.prefs.out

@@ -5,12 +5,13 @@ hdf5
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
-    ^mpich@3.3.2%clang@6.0.0-gfortran cppflags="-g" +hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+    ^mpich@3.3.2%clang@6.0.0-gfortran cppflags="-g" ~argobots+fortran+hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
         ^autoconf@2.69%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^m4@1.4.18%clang@6.0.0-gfortran cppflags="-g" +sigsegv patches=3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00,fc9b61654a3ba1a8d6cd78ce087e7c96366c290bc8d2c299f09828d793b853c8 arch=linux-ubuntu18.04-x86_64
                 ^libsigsegv@2.12%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-            ^perl@5.30.3%clang@6.0.0-gfortran cppflags="-g" +cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+            ^perl@5.32.0%clang@6.0.0-gfortran cppflags="-g" +cpanm+shared+threads arch=linux-ubuntu18.04-x86_64
+                ^berkeley-db@18.1.40%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^gdbm@1.18.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                     ^readline@8.0%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                         ^ncurses@6.2%clang@6.0.0-gfortran cppflags="-g" ~symlinks+termlib arch=linux-ubuntu18.04-x86_64
@@ -20,10 +21,9 @@ hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic+sha
             ^libtool@2.4.6%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^texinfo@6.5%clang@6.0.0-gfortran cppflags="-g"  patches=12f6edb0c6b270b8c8dba2ce17998c580db01182d871ee32b7b6e4129bd1d23a,1732115f651cff98989cb0215d8f64da5e0f7911ebf0c13b064920f088f2ffe1 arch=linux-ubuntu18.04-x86_64
         ^hwloc@2.2.0%clang@6.0.0-gfortran cppflags="-g" ~cairo~cuda~gl~libudev+libxml2~netloc~nvml+pci+shared arch=linux-ubuntu18.04-x86_64
-            ^libpciaccess@0.13.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+            ^libpciaccess@0.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^util-macros@1.19.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^libxml2@2.9.10%clang@6.0.0-gfortran cppflags="-g" ~python arch=linux-ubuntu18.04-x86_64
                 ^libiconv@1.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g" ~pic arch=linux-ubuntu18.04-x86_64
                 ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic+shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/2.externals.out

@@ -5,6 +5,5 @@ hdf5%clang
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
     ^zlib@1.2.8%gcc@7.5.0+optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/2.prefs.out

@@ -5,12 +5,13 @@ hdf5
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic~shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
-    ^mpich@3.3.2%clang@6.0.0-gfortran cppflags="-g" +hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java+mpi+pic~shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+    ^mpich@3.3.2%clang@6.0.0-gfortran cppflags="-g" ~argobots+fortran+hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
         ^autoconf@2.69%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^m4@1.4.18%clang@6.0.0-gfortran cppflags="-g" +sigsegv patches=3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00,fc9b61654a3ba1a8d6cd78ce087e7c96366c290bc8d2c299f09828d793b853c8 arch=linux-ubuntu18.04-x86_64
                 ^libsigsegv@2.12%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-            ^perl@5.30.3%clang@6.0.0-gfortran cppflags="-g" +cpanm~shared+threads arch=linux-ubuntu18.04-x86_64
+            ^perl@5.32.0%clang@6.0.0-gfortran cppflags="-g" +cpanm~shared+threads arch=linux-ubuntu18.04-x86_64
+                ^berkeley-db@18.1.40%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^gdbm@1.18.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                     ^readline@8.0%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                         ^ncurses@6.2%clang@6.0.0-gfortran cppflags="-g" ~symlinks+termlib arch=linux-ubuntu18.04-x86_64
@@ -20,10 +21,9 @@ hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic~sha
             ^libtool@2.4.6%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^texinfo@6.5%clang@6.0.0-gfortran cppflags="-g"  patches=12f6edb0c6b270b8c8dba2ce17998c580db01182d871ee32b7b6e4129bd1d23a,1732115f651cff98989cb0215d8f64da5e0f7911ebf0c13b064920f088f2ffe1 arch=linux-ubuntu18.04-x86_64
         ^hwloc@2.2.0%clang@6.0.0-gfortran cppflags="-g" ~cairo~cuda~gl~libudev+libxml2~netloc~nvml+pci~shared arch=linux-ubuntu18.04-x86_64
-            ^libpciaccess@0.13.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+            ^libpciaccess@0.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^util-macros@1.19.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^libxml2@2.9.10%clang@6.0.0-gfortran cppflags="-g" ~python arch=linux-ubuntu18.04-x86_64
                 ^libiconv@1.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g" ~pic arch=linux-ubuntu18.04-x86_64
                 ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/3.externals.out

@@ -5,24 +5,24 @@ hdf5%clang+mpi
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
-    ^openmpi@3.1.6%clang@6.0.0-gfortran cppflags="-g" ~atomics~cuda~cxx~cxx_exceptions+gpfs~java~legacylaunchers~memchecker~pmi~sqlite3+static~thread_multiple+vt+wrapper-rpath fabrics=none schedulers=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java+mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+    ^openmpi@3.1.6%clang@6.0.0-gfortran cppflags="-g" ~atomics~cuda~cxx~cxx_exceptions+gpfs~java~legacylaunchers~lustre~memchecker~pmi~singularity~sqlite3+static~thread_multiple+vt+wrapper-rpath fabrics=none schedulers=none arch=linux-ubuntu18.04-x86_64
         ^hwloc@1.11.11%clang@6.0.0-gfortran cppflags="-g" ~cairo~cuda~gl~libudev+libxml2~netloc~nvml+pci~shared arch=linux-ubuntu18.04-x86_64
-            ^libpciaccess@0.13.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+            ^libpciaccess@0.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^libtool@2.4.6%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                     ^m4@1.4.18%clang@6.0.0-gfortran cppflags="-g" +sigsegv patches=3877ab548f88597ab2327a2230ee048d2d07ace1062efe81fc92e91b7f39cd00,fc9b61654a3ba1a8d6cd78ce087e7c96366c290bc8d2c299f09828d793b853c8 arch=linux-ubuntu18.04-x86_64
                         ^libsigsegv@2.12%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^pkgconf@1.7.3%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                 ^util-macros@1.19.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
             ^libxml2@2.9.10%clang@6.0.0-gfortran cppflags="-g" ~python arch=linux-ubuntu18.04-x86_64
                 ^libiconv@1.16%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+                ^xz@5.2.5%clang@6.0.0-gfortran cppflags="-g" ~pic arch=linux-ubuntu18.04-x86_64
                 ^zlib@1.2.8%gcc@7.5.0+optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-            ^numactl@2.0.12%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
+            ^numactl@2.0.14%clang@6.0.0-gfortran cppflags="-g"  patches=4e1d78cbbb85de625bad28705e748856033eaafab92a66dffd383a3d7e00cc94 arch=linux-ubuntu18.04-x86_64
                 ^autoconf@2.69%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-                    ^perl@5.30.3%clang@6.0.0-gfortran cppflags="-g" +cpanm~shared+threads arch=linux-ubuntu18.04-x86_64
+                    ^perl@5.32.0%clang@6.0.0-gfortran cppflags="-g" +cpanm~shared+threads arch=linux-ubuntu18.04-x86_64
+                        ^berkeley-db@18.1.40%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                         ^gdbm@1.18.1%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                             ^readline@8.0%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
                                 ^ncurses@6.2%clang@6.0.0-gfortran cppflags="-g" ~symlinks+termlib arch=linux-ubuntu18.04-x86_64
                 ^automake@1.16.2%clang@6.0.0-gfortran cppflags="-g"  arch=linux-ubuntu18.04-x86_64
-

outputs/config/3.prefs.out

@@ -5,6 +5,5 @@ hdf5
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java~mpi+pic+shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
     ^zlib@1.2.11%clang@6.0.0-gfortran cppflags="-g" +optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-

outputs/config/4.externals.out

@@ -5,7 +5,6 @@ hdf5%clang
 
 Concretized
 --------------------------------
-hdf5@1.10.6%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl+mpi+pic~shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
-    ^mpich@3.3%gcc@7.5.0+hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=c7d4ecf865dccff5b764d9c66b6a470d11b0b1a5b4f7ad1ffa61079ad6b5dede,eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
+hdf5@1.10.7%clang@6.0.0-gfortran cppflags="-g" ~cxx~debug~fortran~hl~java+mpi+pic~shared~szip~threadsafe api=none arch=linux-ubuntu18.04-x86_64
+    ^mpich@3.3%gcc@7.5.0~argobots+fortran+hwloc+hydra+libxml2+pci+romio~slurm~verbs+wrapperrpath device=ch3 netmod=tcp patches=c7d4ecf865dccff5b764d9c66b6a470d11b0b1a5b4f7ad1ffa61079ad6b5dede,eb982de3366d48cbc55eb5e0df43373a45d9f51df208abf0835a72dc6c0b4774 pmi=pmi arch=linux-ubuntu18.04-x86_64
     ^zlib@1.2.8%gcc@7.5.0+optimize+pic~shared arch=linux-ubuntu18.04-x86_64
-