Unify PPM CORE location interface and check whether the library is really available in the configure script.

Unify YAXT location interface and check whether the library is really available in the configure script.

See https://github.com/Unidata/netcdf-c/blob/cd39b9d2d83fed40a45e8a8dd748a6bceae5ddfa/include/netcdf_par.h#L13-L18

Also, get rid of ac_fn_c_check_header_mongrel in the configure script.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* This also allows for overrides at make invocation.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* When CXX=CC and FC=ftn are used simultaneously on a CCE 8.7 system,
  ftn inherits the output_verbose_link_cmd as postdeps from the C++
  tests and everything goes wrong afterwards even for non-shared
  archives.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 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 5 years ago and Sergey Kosukhin committed 2 years ago

* Apparently craycc also makes some optimistic assumptions about the effect
  of comparing -0.0 to 0.0.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* For some reason gcc 9.1 does not detect that status is never used
  uninitialized.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* Given how many lines documenting the confusing pattern and how many
  compiler warnings are eliminated by this change...

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* There is no caller for the newly removed function stubs anyway.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* GCC 8.x and newer warn about the previously used "void (*)()", use
  "void (*)(void)" instead.

Thomas Jahns authored 5 years ago and Sergey Kosukhin committed 2 years ago

* collSpec is meant to be a dumb data collection, none of its member should
  be subject to change.