[MacPorts] #62727: OpenBLAS fails to build on Apple M1

[MacPorts]

#62727: OpenBLAS fails to build on Apple M1
------------------------------+--------------------
  Reporter:  Gregory-Gelfond  |      Owner:  (none)
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.6.4
Resolution:                   |   Keywords:
      Port:  OpenBLAS         |
------------------------------+--------------------

Comment (by NicosPavlov):

 It seems to be another error. The version of python should not have any
 influence, but while #61700 fails to compile some code, this is the linker
 which here fails after having compiled everything:

 {{{
 ...
 :info:build perl ./gensymbol osx arm64 _ 0 0  0 0 0 0 "" "" 0 0 1 1 1 1 >
 osx.def
 :info:build /opt/local/bin/gfortran-mp-devel -O3 -Wall -frecursive -fno-
 optimize-sibling-calls -fPIC -march=armv8-a  -all_load
 -headerpad_max_install_names -install_name
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_math_OpenBLAS/OpenBLAS/work
 /xianyi-OpenBLAS-2f6d35c/exports/../libopenblas.1.dylib" -dynamiclib -o
 ../libopenblas-r1.dylib ../libopenblas-r1.a
 -Wl,-exported_symbols_list,osx.def  -L/opt/local/lib -L/opt/local/lib/gcc-
 devel/gcc/aarch64-apple-darwin20/11.0.1 -L/opt/local/lib/gcc-
 devel/gcc/aarch64-apple-darwin20/11.0.1/../../.. -Wl,-rpath,,loader_path
 -Wl,-rpath,/opt/local/lib -Wl,-rpath,/opt/local/lib/gcc-devel/gcc/aarch64
 -apple-darwin20/11.0.1 -Wl,-rpath,/opt/local/lib/gcc-devel/gcc/aarch64
 -apple-darwin20/11.0.1/../../.. -L/opt/local/lib -L/opt/local/lib/gcc-
 devel/gcc/aarch64-apple-darwin20/11.0.1 -L/opt/local/lib/gcc-
 devel/gcc/aarch64-apple-darwin20/11.0.1/../../.. -Wl,-rpath,,loader_path
 -Wl,-rpath,/opt/local/lib -Wl,-rpath,/opt/local/lib/gcc-devel/gcc/aarch64
 -apple-darwin20/11.0.1 -Wl,-rpath,/opt/local/lib/gcc-devel/gcc/aarch64
 -apple-darwin20/11.0.1/../../..  -lgfortran -lm -lSystem -lgfortran -lm
 -lSystem
 :info:build ld: file not found: loader_path
 :info:build collect2: error: ld returned 1 exit status
 ...
 }}}

 I indeed do not see what this "loader_path" is doing here. I checked in my
 case (x86 CPU), all linkage is done through direct reference to path (i.e.
 "-L/opt/local/lib -L/opt/local/lib/gcc10/gcc/x86_64-apple-darwin19/10.3.0
 ...").

-- 
Ticket URL: <https://trac.macports.org/ticket/62727#comment:4>
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