I don't have anything like MACOSX_DEPLOYMENT_TARGET or CPLUS_INCLUDE_PATH set and I'll paste the list of filenames contain cmath below.
I wonder if this is part of the problem. According to gcc--version: Configured with: --prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-include-dir=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1 Apple clang version 11.0.0 (clang-1100.0.33.8) Target: x86_64-apple-darwin19.0.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin however, the gxx-include directory /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1 does not exist. I tried adding a link from here to /Library/Developer/CommandLineTools/usr/include/c++/v1/ and setting CXXFLAGS="-isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk" but this didn't help. Thanks again for your help! Andrew ---- /Applications/GIMP.app/Contents/Resources/lib/python2.7/lib-dynload/cmath.so /Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/lib-dynload/cmath.cpython-37m-darwin.so /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/cmath.rb /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/lib-dynload/cmath.cpython-37m-darwin.so /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/cmath.rb /Library/Developer/CommandLineTools/usr/include/c++/v1/cmath /Library/Ruby/Gems/2.6.0/specifications/default/cmath-1.0.0.gemspec /System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/cmath.so /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/cmath.rb /System/Library/Templates/Data/Library/Ruby/Gems/2.6.0/specifications/default/cmath-1.0.0.gemspec /opt/metasploit-framework/embedded/lib/ruby/2.4.0/cmath.rb /usr/local/Cellar/boost/1.71.0/include/boost/compatibility/cpp_c_headers/cmath /usr/local/Cellar/boost/1.71.0/include/boost/config/no_tr1/cmath.hpp /usr/local/Cellar/boost/1.71.0/include/boost/phoenix/stl/cmath.hpp /usr/local/Cellar/boost/1.71.0/include/boost/units/cmath.hpp /usr/local/Cellar/ipython/7.8.0/libexec/vendor/lib/python3.7/site-packages/jedi/third_party/typeshed/stdlib/2and3/cmath.pyi /usr/local/Cellar/python/3.7.4_1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/lib-dynload/cmath.cpython-37m-darwin.so /usr/local/Cellar/python@2/2.7.16_1/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/cmath.so /usr/local/Cellar/ruby/2.6.5/lib/ruby/2.6.0/cmath.rb /usr/local/Cellar/ruby/2.6.5/lib/ruby/gems/2.6.0/specifications/default/cmath-1.0.0.gemspec /usr/local/src/sage/local/include/boost/compatibility/cpp_c_headers/cmath /usr/local/src/sage/local/include/boost/config/no_tr1/cmath.hpp /usr/local/src/sage/local/include/boost/phoenix/stl/cmath.hpp /usr/local/src/sage/local/include/boost/units/cmath.hpp On Wednesday, 30 October 2019 17:41:33 UTC+11, Dima Pasechnik wrote: > > it seems to be related to Apple removing support for libstdc++. > > Could it be that you have something related to "deployment target" > (MACOSX_DEPLOYMENT_TARGET ?) in your default environment variables, or > similar settings in Xcode? > Or perhaps CPLUS_INCLUDE_PATH is set somewhere? > > Perhaps your "XcodeDefault.xctoolchain" - that's where that wretched > C++ cmath header comes from - is pointing to a wrong toolchain? > Can you search for the files named "cmath" on the machine? > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/518a5813-7c1d-4d5d-85df-bf43398aef7c%40googlegroups.com.
