Before starting a build myself I checked your logs. It looks like for ecm the
problem was not new but only gave a warning before:
/bin/sh ../libtool --mode=compile gcc -march=corei7 -mtune=corei7-avx -g -O3
-fPIC -c -o mulredc1.lo mulredc1.s
libtool: compile: gcc -march=corei7
I just updated my command-line tools and Xcode to version 7.0 (released
today, I think). When I tried to build the latest beta of Sage from
scratch, the following packages did not build:
- ecm: log file http://www.math.washington.edu/~palmieri/Sage/ecm-6.4.4.log
- gsl: log file
