On Thu, 14 Jan 2021, 00:52 Zachary Scherr, <[email protected]> wrote:
> I've been trying to help out with getting sage to work properly on Mac,
> and I was curious if anyone can explain the purpose of
> SAGE_MACOSX_DEPLOYMENT_TARGET to me.
>
> I don't know autoconf at all, but I find that if I configure with
> --with-system-python3=no
> then SAGE_MACOSX_DEPLOYMENT_TARGET gets set to "legacy". This is
> presumably because of the lines
>
> AS_IF([test x$sage_spkg_install_python3 = xno],
> [PYTHON_FOR_VENV="$ac_cv_path_PYTHON3"],
> [SAGE_MACOSX_DEPLOYMENT_TARGET=legacy])
> AC_SUBST([PYTHON_FOR_VENV])
> AC_SUBST([SAGE_MACOSX_DEPLOYMENT_TARGET])
>
> located in build/pkgs/python3/spkg-configure.m4.
>
> As far as I can tell, this leads to all sorts of warnings when doctesting
> sage.
>
I would treat the very idea of not using an already installed python3 as a
legacy option.
But yes, the issue is related to the correct setting of
MACOSX_DEPLOYMENT_TARGET
- something that only Apple itself understands well :-)
Specifically, I get lots of warnings like:
>
> ld: warning: dylib (/usr/local/lib/libmpfr.dylib) was built for newer
> macOS version (10.15) than being linked (10.9)
> ld: warning: dylib (/usr/local/lib/libgmp.dylib) was built for newer
> macOS version (10.15) than being linked (10.9)
> ld: warning: dylib (/usr/local/lib/libgmpxx.dylib) was built for newer
> macOS version (10.15) than being linked (10.9)
> ld: warning: dylib (/usr/local/lib/libgsl.dylib) was built for newer
> macOS version (10.15) than being linked (10.9)
> ld: warning: dylib (/usr/local/lib/libntl.dylib) was built for newer
> macOS version (10.15) than being linked (10.9)
>
> now I believe that this is caused by src/bin/sage-env which has the
> following code:
>
> if [ "$UNAME" = "Darwin" ]; then
> export MACOSX_VERSION=`uname -r | awk -F. '{print $1}'`
> case "$SAGE_MACOSX_DEPLOYMENT_TARGET" in
> legacy)
> # legacy behavior of the Sage distribution.
> # set MACOSX_DEPLOYMENT_TARGET -- if set incorrectly, this can
> # cause lots of random "Abort trap" issues on OSX. see trac
> # #7095 for an example.
> if [ $MACOSX_VERSION -ge 14 ]; then
> # various packages have still have issues with
> # two digit OS X versions
> MACOSX_DEPLOYMENT_TARGET=10.9
> else
> MACOSX_DEPLOYMENT_TARGET=10.$[$MACOSX_VERSION-4]
> fi
> export MACOSX_DEPLOYMENT_TARGET
> ;;
> "")
> # Do nothing
> ;;
> *)
> # A fixed version set at configure time.
> export MACOSX_DEPLOYMENT_TARGET=$SAGE_MACOSX_DEPLOYMENT_TARGET
> ;;
> esac
>
> and I'm trying to understand where all of this is coming from. The trac
> ticket this references is 11 years old and so I'm not sure it's an issue
> any more.
>
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