convert a static library to a dynamic one?

[Mark Brethen]

With the ‘-r’ option on ld I ended up with an object, not dylib:

brethen-air:~ marbre$ otool -hv /opt/local/lib/libspooles.1.dylib
Mach header
      magic cputype cpusubtype  caps    filetype ncmds sizeofcmds      flags
MH_MAGIC_64  X86_64        ALL  0x00      OBJECT     4        688 SUBSECTIONS_VIA_SYMBOLS

Removing that, however, causes it to fail: symbol(s) not found for architecture x86_64

This builds the archive file:

:debug:build system -W /opt/local/var/macports/build/_Users_marbre_ports_math_spooles/spooles/work/spooles.2.2_SHARED/MPI/src: /usr/bin/make -f makeGlobalLib
:info:build /opt/local/bin/mpicc-mpich-mp -c -Os -fPIC -I/opt/local/include/mpich-mp aggListMPI.c -o MPI_aggListMPI.o
.
.
.
:info:build /opt/local/bin/mpicc-mpich-mp -c -Os -fPIC -I/opt/local/include/mpich-mp utilities.c -o MPI_utilities.o
:info:build ar rv ../../spooles.a MPI_*.o
:info:build ar: creating archive ../../spooles.a
.
.
.
:info:build rm -f MPI_*.o
:info:build ranlib ../../spooles.a

Then use linker to convert static library to dylib:

:debug:build system -W /opt/local/var/macports/build/_Users_marbre_ports_math_spooles/spooles/work/spooles.2.2_SHARED: ld -dylib -arch x86_64 -all_load spooles.a -x -install_name /opt/local/lib/libspooles.1.dylib -o libspooles.1.dylib

Why doesn’t this work?
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Mark Brethen
mark.brethen at gmail.com



> On Nov 18, 2018, at 5:54 PM, Joshua Root <jmr at macports.org> wrote:
> 
> The default value of configure.ld_archflags is '-arch
> ${configure.build_arch}' provided the selected compiler supports -arch.
> So ‘-arch ${configure.ld_archflags}’ expands to e.g. ‘-arch -arch
> x86_64’. Don't do that. :)
> 
> You can easily find out the value of any variable in a portfile by
> adding a line like:
> 
> puts "somevar = ${somevar}"
> 
> (Just run something like 'port info' to trigger it.)
> 
> - Josh
> 
> On 2018-11-19 09:34 , Mark Brethen wrote:
>> This port does not have a configure phase and I set 'universal no’ It
>> errors with ‘-arch ${configure.ld_archflags}’. How is this variable set? 
>> 
>> 
>> Mark Brethen
>> mark.brethen at gmail.com <mailto:mark.brethen at gmail.com>
>> 
>> 
>> 
>>> On Nov 18, 2018, at 4:16 PM, Joshua Root <jmr at macports.org
>>> <mailto:jmr at macports.org>> wrote:
>>> 
>>> configure.ld_archflags
>>