SuiteSparse +universal and build_arch support

[takeshi@…]

Modified Portfile to enable universal. It builds universal libs but port installed SuiteSparse does not give +universal. I don't see why.

[jmr@…]

You haven't actually defined a universal variant (the default one isn't added because of use_configure no).

[takeshi@…]

I attached a modified to enable build for ppc64 by adding configure.cc_archflags. I hope you have a chance to look at it this time.

[daniva@…]

If it helps, this patch also solved the following problem when compiling with i386 (no universal flag)

ld: warning: in /opt/local/lib/libmetis.a, file is not of required architecture
Undefined symbols for architecture i386:
  "_METIS_NodeND", referenced from:
      _cholmod_metis in libcholmod.a(cholmod_metis.o)
  "_METIS_NodeComputeSeparator", referenced from:
      _cholmod_metis_bisector in libcholmod.a(cholmod_metis.o)

[daniva@…]

Cc Me!

[ryandesign@…]

A different proposal for suitesparse universal is in #19455.

[jmr@…]

r75415