[netCDF #HQJ-659259]: Error running ./configure when trying to install netCDF 3.6.3

Hi,

If you've already solved your problem building netCDF on MacOS X, you can 
ignore this,
but I just ran across some relevant information while investigating another 
similar problem.

According to a post at http://www.macresearch.org/problems-gfortran-snow-leopard

  [On MacOS X] There is a problem building many open source packages
  containing Fortran code on 10.5 and 10.6.

  As mentioned above recent Apple compilers will default to building
  X86_64 code on 64 bit processor machines. The various Fortran
  compilers all seem to default to 32bit i386 code.

  As a result when trying to do a standard configure/make build there
  will be failures in both the configure and make steps with 'wrong
  architecture' messages.

  The appropriate cure depends on the desired outcome. If you want
  64bit code add -m64 to FFLAGS. If you want 32bit code add --arch
  i386 to CFLAGS and CXXFLAGS.

  Also don't use -O3 'optimisation'. It is very suboptimal on modern
  processors as well being bug ridden. Modern CPUs are not limited by
  core speed. The problem is feeding in instructions fast enough to
  keep the pipelines full. Hence Apple recommends using -Os which is
  like -O2 with the omission of 'optimisations' that increase code
  size.  ...
  Bill Northcott

--Russ

Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: HQJ-659259
Department: Support netCDF
Priority: Normal
Status: Closed