N.B. Using a Sierra 10.12.6 environment with Xcode 9.2 and the `~/.jhbuildrc-custom' parameters:
setup_sdk(target='10.6')
or
setup_sdk(target='10.7')
This causes `jhbuild bootstrap' to fail when bootstrapping `cmake 3.10.0':
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 [-Wdeprecated]
cmake_bootstrap_24961_test.cxx:6:2: error: "Compiler is not in a mode aware of C++11."
The approach I am taking now is to roll back to gtk-osx `Last-Lion', and create a custom local branch to fold in subsequent commits necessary to update pango/cairo/freetype versions.
I may need to set up a custom environment to improve build compatibility.
