Re: compiling gpc on Mac OS 10.10.5 Yosemite

Jonas:

> Xcode 7 and later have replaced the system assembler with Clang, which
> doesn't support stabs debug information. If there are any places where you
> can specify options to be used while compiling libgcc.a, try adding the
> -gdwarf-2 flag.

Thanks for the suggestion.

libgcc.a is not mentioned in build-gpc.command.  I guessed:

#               setenv GPC_MAKE_FLAGS 'CC="gcc -arch i386"'
# TDS:
                setenv GPC_MAKE_FLAGS 'CC="gcc -arch i386 -gdwarf-2"'

but it failed as above.  However the code does say:
# build and install a dynamic libgpc

I was not clear where to inject your suggestion.

Maybe one could force the use of an open source gcc instead of Clang?

> You could also try downgrading to Xcode 6.4, which still shipped with the
> old assembler. You can get it from https://developer.apple.com/downloads/

I wouldn't want to do that because it would put us in a bad position
later when Xcode 6.4 is no longer around.  Better to move forward if possible.

Tom

  Thomas D. Schneider, Ph.D.
  Senior Investigator
  National Institutes of Health
  National Cancer Institute
  Center for Cancer Research
  Gene Regulation and Chromosome Biology Laboratory
  Molecular Information Theory Group
  Frederick, Maryland  21702-1201
  https://schneider.ncifcrf.gov (current link)
  https://alum.mit.edu/www/toms (permanent link)

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