* These variables are checked via the JSON files in PIO control setups
  and should not change type unless necessary. Consistency is not a
  necessity.

This reverts commit 4c120cc6.

This makes the branch identical to 2a4af8e6.

This reverts commit c4fade36.

This makes the branch identical to 5ebb81ec.

The configure options enabling the interfaces are named consistently with the
options enabling Fortran interfaces.

This is supposed to be mainly reformatting with a couple of refactoring
touches. No functional changes are intended.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 3 years ago

* This also allows for overrides at make invocation.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 3 years ago

* This was needed to get working builds on Piz Daint, libtool 2.4.2 generated
  bogus dependencies on libquadmath.so.

Thomas Jahns authored 7 years ago and Sergey Kosukhin committed 3 years ago

* The approach with cpp relies on GNU tools, i.e. is not portable.

Thomas Jahns authored 7 years ago and Sergey Kosukhin committed 3 years ago

* To the F77 and F2003 interface generators that is.

* Since write, mmap and a number of other functions are not part of
  ISO C (i.e. strictly conforming programs must not use those), we need
  to ensure the build environment provides POSIX conformance.
* This mostly prevents unrelated bug reports later on.
* From POSIX 2008, CDI unconditionally only uses getline and has a
  work-around in case that is missing.

* Do not create unnecessary temporaries.